Please note that Cypress is an Infineon Technologies Company.
The document following this cover page is marked as “Cypress” document as this is the
company that originally developed the product. Please note that Infineon will continue
to offer the product to new and existing customers as part of the Infineon product
portfolio.
Continuity of document content
The fact that Infineon offers the following product as part of the Infineon product
portfolio does not lead to any changes to this document. Future revisions will occur
when appropriate, and any changes will be set out on the document history page.
Continuity of ordering part numbers
Infineon continues to support existing part numbers. Please continue to use the
ordering part numbers listed in the datasheet for ordering.
www.infineon.com
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
EZ-USB AT2LP™ USB 2.0 to
ATA/ATAPI Bridge
EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge
Features
■
Supports Board-level Manufacturing Test using the USB I/F
■
Fixed Function Mass Storage Device - Requires no Firmware
■
■
Two Power Modes: Self Powered and USB Bus Powered to
enable Bus Powered CF (CompactFlash) Readers and Truly
Portable USB Hard Drives
Places the ATA Interface in High Impedance (High Z) to enable
Sharing of the ATA Bus with another Controller such as an
IEEE-1394 to ATA Bridge Chip or MP3 Decoder)
■
Low Power 3.3 V Operation
■
Fully Compatible with Native USB Mass Storage Class Drivers
■
Cypress Mass Storage Class Drivers available for Windows®
(98SE, ME, 2000, XP) and Mac OS X operating systems
■
Certified Compliant for USB 2.0 (TID# 40490119), the USB
Mass Storage Class, and the USB Mass Storage Class
Bulk-Only Transport (BOT) Specification
■
Operates at High-Speed (480 Mbps) or Full-Speed (12 Mbps)
USB
Features (CY7C68320C/CY7C68321C only)
■
Complies with ATA/ATAPI-6 Specification
■
■
Supports 48-bit Addressing for Large Hard Drives
Supports HID Interface or Custom GPIOs to enable features
such as Single Button Backup, Power Off, and LED-based
Notification
■
Supports ATA Security Features
■
56-pin QFN and 100-pin TQFP Pb-free Packages
■
Supports any ATA Command with the ATACB Function
■
CY7C68321C is Ideal for Battery Powered Designs
■
Supports Mode for BIOS Boot Support
■
CY7C68320C is Ideal for Self and Bus Powered Designs
■
Supports ATAPI Serial Number VPD Page Retrieval for Digital
Rights Management (DRM) Compatibility
■
Automotive AEC Grade Option (–40 °C to 85 °C)
■
Supports PIO Modes 0, 3, and 4, Multiword DMA Mode 2, and
UDMA Modes 2, 3, and 4
■
Pin Compatible with
Compatibility Mode)
■
Uses One Small External Serial EEPROM for Storage of USB
Descriptors and Device Configuration Data
■
56-pin SSOP and 56-pin QFN Pb-free Packages
■
ATA Interface IRQ Signal Support
■
CY7C68301C is Ideal for Battery Powered Designs
■
Supports one or two ATA/ATAPI Devices
■
CY7C68300C is Ideal for Self and Bus Powered Designs
■
Supports CompactFlash and one ATA/ATAPI Device
Features (CY7C68300C/CY7C68301C only)
CY7C68300A
(using
Backward
Errata: For information on silicon errata, see “Errata” on page 44. Details include trigger conditions, devices affected, and proposed workaround.
Cypress Semiconductor Corporation
Document Number: 001-05809 Rev. *Q
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised May 2, 2019
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Logic Block Diagram
SDA
24
MHz
XTAL
I2C Bus Master
Reset
SCL
Misc control signals and GPIO
PLL
ATA 3-state Control
Internal Control Logic
ATA Interface
Control Signals
Control
ATA
Interface
Logic
USB
VBUS
D+
D-
USB 2.0
Tranceiver
CY Smart USB
FS/HS Engine
4 kByte FIFO
Data
16 Bit ATA Data
Applications
■
ATA/ATAPI master only
The CY7C68300C/301C and CY7C68320C/321C implement a
USB 2.0 bridge for all ATA/ATAPI-6 compliant mass storage
devices, such as the following:
■
ATA/ATAPI slave only
■
ATA/ATAPI master and ATA/ATAPI slave
■
CompactFlash only
■
ATA/ATAPI slave and CompactFlash or other removable IDE
master
■
Hard Drives
■
CD-ROM, CD-R/W
■
DVD-ROM, DVD-RAM, DVD±R/W
■
MP3 Players
■
Personal Media Players
■
CY4615B EZ-USB AT2LP Reference Design Kit
■
CompactFlash
■
USB Specification Version 2.0
■
ATA Specification T13/1410D Revision 3B
■
USB Mass Storage Class Bulk-Only Transport Specification
http://www.usb.org/developers/devclass_docs/usbmassbulk_10.pdf
■
Microdrives
■
Tape Drives
■
Personal Video Recorders
■
Automotive Applications
Additional Resources
The CY7C68300C/301C and CY7C68320C/321A support one
or two devices in the following configurations:
Document Number: 001-05809 Rev. *Q
Page 2 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Contents
Introduction ....................................................................... 4
CY7C68300A Compatibility .............................................. 4
Pin Diagrams ..................................................................... 5
Pin Descriptions ............................................................... 9
Additional Pin Descriptions ........................................ 13
HID Functions for Button Controls ............................... 16
Functional Overview ...................................................... 16
USB Signaling Speed ................................................ 16
ATA Interface ............................................................ 16
Operating Modes ............................................................ 19
Operational Mode Selection Flow ............................. 19
Fused Memory Data .................................................. 20
Normal Mass Storage Mode ...................................... 20
Board Manufacturing Test Mode ............................... 20
EEPROM Organization ............................................. 22
Programming the EEPROM ...................................... 35
Absolute Maximum Ratings .......................................... 36
Operating Conditions ..................................................... 36
DC Characteristics ......................................................... 36
AC Electrical Characteristics ........................................ 37
ATA Timing Characteristics ....................................... 37
USB Transceiver Characteristics .............................. 37
Ordering Information ...................................................... 37
Ordering Code Definitions ......................................... 37
Document Number: 001-05809 Rev. *Q
Package Diagrams .......................................................... 38
General PCB Layout Recommendations
for USB Mass Storage Designs ..................................... 41
Quad Flat Package No Leads (QFN) Package
Design Notes ................................................................... 41
Other Design Considerations ........................................ 42
Proper Power-Up Sequence ..................................... 42
IDE Removable Media Devices ................................. 42
Devices With Small Buffers ....................................... 42
Acronyms ........................................................................ 43
Document Conventions ................................................. 43
Units of Measure ....................................................... 43
Errata ............................................................................... 44
Part Numbers Affected .............................................. 44
AT2LP Qualification Status ....................................... 44
AT2LP Errata Summary ............................................ 44
Document History Page ................................................. 45
Sales, Solutions, and Legal Information ...................... 47
Worldwide Sales and Design Support ....................... 47
Products .................................................................... 47
PSoC® Solutions ...................................................... 47
Cypress Developer Community ................................. 47
Technical Support ..................................................... 47
Page 3 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Introduction
The EZ-USB AT2LP (CY7C68300C/CY7C68301C and
CY7C68320C/CY7C68321C) implements a fixed-function
bridge between one USB port and one or two ATA- or
ATAPI-based mass storage device ports. This bridge adheres to
the Mass Storage Class Bulk-Only Transport Specification (BOT)
and is intended for bus and self powered devices.
The AT2LP is the latest addition to the Cypress USB mass
storage portfolio, and is an ideal cost- and power-reduction path
for designs that previously used Cypress’s ISD-300A1,
ISD-300LP, or EZ-USB AT2.
Specifically, the CY7C68300C/CY7C68301C includes a mode
that makes it pin-for-pin compatible with the EZ-USB AT2
(CY7C68300A).
The USB port of CY7C68300C/301C and CY7C68320C/321C
(AT2LP) is connected to a host computer directly or with the
downstream port of a USB hub. Software on the USB host
system issues commands and sends data to the AT2LP and
receives status and data from the AT2LP using standard USB
protocol.
The ATA/ATAPI port of the AT2LP is connected to one or two
mass storage devices. A 4 kbyte buffer maximizes ATA/ATAPI
data transfer rates by minimizing losses due to device seek
times. The ATA interface supports ATA PIO modes 0, 3 [1], and
4, multiword DMA mode 2, and Ultra DMA modes 2, 3, and 4.
The device initialization process is configurable, enabling the
AT2LP to initialize ATA/ATAPI devices without software
intervention.
CY7C68300A Compatibility
As mentioned in the previous section, the CY7C68300C/301C
contains a backward compatibility mode that enables it to be
used in existing EZ-USB AT2 (CY7C68300A) designs. The
backward compatibility mode is enabled by programming the
EEPROM with the CY7C68300A signature.
During startup, the AT2LP checks the I2C bus for an EEPROM
with a valid signature in the first two bytes. If the signature is
0x4D4D, the AT2LP configures itself for pin-to-pin compatibility
with the AT2 and begins normal mass storage operation. If the
signature is 0x534B, the AT2LP configures itself with the AT2LP
pinout and begins normal mass storage operation.
Refer to the logic flow in Figure 1 for more information on the
pinout selection process.
Most designs that use the AT2 can migrate to the AT2LP with no
changes to either the board layout or EEPROM data. Cypress
has published an application note focused on migrating from the
AT2 to the AT2LP to help expedite the process. It can be
downloaded from the Cypress website (http://www.cypress.com)
or obtained through a Cypress representative.
Figure 1. Simplified Pinout Selection Flowchart
Read EEPROM
EEPROM
Signature
0x4D4D?
No
Yes
Set
EZ-USB AT2
(CY7C68300A)
Pinout
Set
EZ-USB AT2LP
(CY7C68300B)
Pinout
Normal Operation
Note
1. Errata: The ATA/ATAPI-6 standard specifies the data recovery timings for each of the Read (DIOR)/Write (DIOW) data transfer modes such as PIO mode-0, 1, 2, 3,
4. As per the standard for PIO mode-3 this timing value is 70 ns. In AT2LP the actual value measured is out of spec limits. Please refer to “Errata” on page 44 for
details and workaround.
Document Number: 001-05809 Rev. *Q
Page 4 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Pin Diagrams
The AT2LP is available in different package types to meet a variety of design needs. The CY7C68320C/321C is available in 56-pin
QFN and 100-pin TQFP packages to provide the greatest flexibility for new designs. The CY7C68300C is available in 56-pin SSOP
and QFN package types and CY7C68301C is available in QFN package to ensure backward compatibility with CY7C68300A
designs.
Figure 2. 56-pin SSOP Pinout (CY7C68300C only)
1
DD13
DD12
56
2
DD14
DD11
55
3
DD15
DD10
54
4
GND
DD9
53
5
ATAPUEN (GND)
DD8
52
6
VCC
( ATA_EN ) VBUS_ ATA_ENABLE
51
7
GND
VCC
50
8
IORDY
RESET#
49
GND
48
ARESET#
47
( VBUS_ PWR_ VALID ) DA2
46
CS1#
45
9
DMARQ
10
AVCC
11
XTALOUT
12
XTALIN
13
AGND
14
VCC
15
16
CS0#
44
(DA2 ) DRVPWRVLD
43
DPLUS
DA1
42
DMINUS
DA0
41
17
GND
INTRQ
40
18
VCC
VCC
39
19
GND
DMACK #
38
20
PWR500 # ( PU 10K)
DIOR #
37
21
GND (Reserved )
DIOW #
36
22
SCL
GND
35
23
SDA
VCC
34
24
VCC
GND
33
25
DD0
DD7
32
26
DD1
DD6
31
27
DD2
DD5
30
28
DD3
DD4
29
Note Labels in italics denote pin functionality during CY7C68300A compatibility mode.
Document Number: 001-05809 Rev. *Q
Page 5 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Pin Diagrams (continued)
DD13
DD12
DD11
DD10
DD9
50
49
48
47
46
VCC
DD14
51
43
DD15
52
DD8
GND
53
VBUS_ATA_ENABLE (ATA_EN)
ATAPUEN (NC)
54
44
VCC
55
45
GND
56
Figure 3. 56-pin QFN Pinout (CY7C68300C/CY7C68301C)
IORDY
1
42
RESET#
DMARQ
2
41
GND
DIOR#
14
29
DIOW#
GND
28
DMACK#
30
GND
31
13
27
12
VCC
GND
(PU10K) PWR500#
26
VCC
GND
32
25
11
DD7
INTRQ
VCC
24
33
DD6
10
23
DA0
GND
DD5
DA1
34
22
35
9
DD4
8
21
DPLUS
DMINUS
DD3
DRVPWRVLD (DA2)
20
36
DD2
7
19
CS0#
VCC
DD1
CS1#
37
18
38
6
DD0
5
AGND
17
XTALIN
VCC
DA2 (VBUS_PWR_VALID)
16
ARESET#
39
15
40
4
SCL
3
SDA
AVCC
XTALOUT
Note Italic labels denote pin functionality during CY7C68300A compatibility mode.
Document Number: 001-05809 Rev. *Q
Page 6 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Pin Diagrams (continued)
GND
VCC
GPIO2
GND
DD15
DD14
DD13
DD12
DD11
DD10
DD9
DD8
VBUS_ATA_ENABLE
VCC
56
55
54
53
52
51
50
49
48
47
46
45
44
43
Figure 4. 56-pin QFN Pinout (CY7C68320C/CY7C68321C)
IORDY
1
42
RESET#
DMARQ
2
41
GND
AVCC
3
40
ARESET#
XTALOUT
4
39
DA2
XTALIN
5
38
CS1#
AGND
6
37
CS0#
VCC
7
36
GPIO0
DPLUS
8
35
DA1
DMINUS
9
34
DA0
GND
10
33
INTRQ
VCC
11
32
VCC
18
19
20
21
22
23
24
25
26
27
28
DD1
DD2
DD3
DD4
DD5
DD6
DD7
GND
VCC
GND
DIOW#
DD0
29
17
14
VCC
DIOR#
GND
16
DMACK#
30
15
31
13
SCL
12
SDA
GND
GPIO1
Document Number: 001-05809 Rev. *Q
Page 7 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Pin Diagrams (continued)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
DD8
VBUS_ATA_ENABLE
VCC
RESET#
NC
GND
ARESET#
DA2
CS1#
CS0#
DRVPWRVLD
DA1
DA0
INTRQ
VCC
GND
NC
NC
VBUSPWRD
NC
NC
NC
LOWPWR#
NC
DMACK#
DIOR#
DIOW#
VCC
NC
NC
VCC
GND
IORDY
DMARQ
GND
GND
GND
GND
AVCC
XTALOUT
XTALIN
AGND
NC
NC
NC
VCC
DPLUS
DMINUS
GND
VCC
GND
SYSIRQ
GND
GND
GND
PWR500#
GND
NC
SCL
SDA
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
Document Number: 001-05809 Rev. *Q
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
NC
NC
VCC
DD0
DD1
DD2
DD3
VCC
GND
NC
GND
NC
GND
DD4
DD5
DD6
DD7
GND
VCC
GND
30
ATAPUEN
GND
DD15
DD14
DD13
DD12
GND
GPIO5
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
NC
NC
VCC
GND
DD11
DD10
DD9
100
Figure 5. 100-pin TQFP Pinout (CY7C68320C only)
Page 8 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Pin Descriptions
The following table lists the pinouts for the 56-pin SSOP, 56-pin QFN, and 100-pin TQFP package options for the AT2LP. Refer to the
Pin Diagrams on page 5 for differences between the 68300C/01C and 68320C/321C pinouts for the 56-pin packages.
Table 1. AT2LP Pin Descriptions
Note Italic pin names denote pin functionality during CY7C68300A compatibility mode
100
56
56
TQFP QFN SSOP
1
55
6
2
56
3
1
Pin Name
Pin Default State
Type at Startup
Pin Description
VCC
PWR
7
GND
GND
8
IORDY
I[2]
Input
ATA control. Apply a 1k pull up to 3.3 V.
[2]
Input
ATA control.
I
VCC. Connect to 3.3 V power source.
Ground.
4
2
9
DMARQ
5
6
7
8
N/A
N/A
GND
9
3
10
AVCC
PWR
10
4
11
XTALOUT
Xtal
Xtal
24 MHz crystal output. (See XTALIN, XTALOUT on page 13).
Xtal
24 MHz crystal input. (See XTALIN, XTALOUT on page 13).
Ground.
Analog VCC. Connect to VCC through the shortest path possible.
11
5
12
XTALIN
Xtal
12
6
13
AGND
GND
13
14
15
N/A
N/A
NC
16
7
14
VCC
PWR
17
8
15
DPLUS
I/O
High Z
USB D+ signal (See DPLUS, DMINUS on page 13).
18
9
16
DMINUS
I/O
High Z
USB D– signal (See DPLUS, DMINUS on page 13).
19
10
17
GND
GND
Ground.
20
11
18
VCC
PWR
VCC. Connect to 3.3 V power source.
21
12
19
GND
GND
Ground.
22
N/A
N/A
SYSIRQ
I
23
24
25
N/A
N/A
GND
GND
26[3]
13[3]
20
PWR500#[4]
(PU 10K)
O
27
14
21
GND (RESERVED)
28
N/A
N/A
NC
29
15
22
SCL
O
30
16
23
SDA
I/O
Analog ground. Connect to ground with as short a path as
possible.
No connect.
VCC. Connect to 3.3 V power source.
Input
USB interrupt request. (See SYSIRQ on page 13). Active
HIGH. Connect to GND if functionality is not used.
Ground.
bMaxPower request granted indicator.
(See PWR500# on page 15). Active LOW.
N/A for CY7C68320C/CY7C68321C 56-pin packages.
Reserved. Tie to GND.
No connect.
Active for Clock signal for I2C interface. (See SCL, SDA on page 13).
several ms at Apply a 2.2k pull up resistor.
startup.
Data signal for I2C interface. (See SCL, SDA on page 13).
Apply a 2.2k pull up resistor.
Notes
2. If byte 8, bit 4 of the EEPROM is set to ‘0’, the ATA interface pins are only active when VBUS_ATA_EN is asserted. See VBUS_ATA_ENABLE on page 15.
3. The General Purpose inputs can be enabled on ATAPUEN, PWR500#, and DRVPWRVLD via EEPROM byte 8, bit 7 on CY7C68320C/CY7C68321C.
4. A ‘#’ sign after the pin name indicates that it is active LOW.
Document Number: 001-05809 Rev. *Q
Page 9 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 1. AT2LP Pin Descriptions (continued)
Note Italic pin names denote pin functionality during CY7C68300A compatibility mode
100
56
56
TQFP QFN SSOP
Pin Name
Pin Default State
Type at Startup
Pin Description
31
32
N/A
N/A
NC
33
17
24
VCC
PWR
DD0
I/O
[5]
High Z
ATA data bit 0.
[5]
34
18
25
No connect.
VCC. Connect to 3.3 V power source.
35
19
26
DD1
I/O
High Z
ATA data bit 1.
36
20
27
DD2
I/O[5]
High Z
ATA data bit 2.
[5]
High Z
ATA data bit 3.
37
21
28
DD3
I/O
38
N/A
N/A
VCC
PWR
VCC. Connect to 3.3 V power source.
39
N/A
N/A
GND
GND
Ground.
40
N/A
N/A
NC
NC
41
N/A
N/A
GND
42
N/A
N/A
NC
43
N/A
N/A
GND
44
22
29
DD4
I/O[5]
High Z
ATA data bit 4.
DD5
I/O[5]
High Z
ATA data bit 5.
DD6
I/O[5]
High Z
ATA data bit 6.
High Z
ATA data bit 7. Apply a 1k pull down to GND.
45
46
23
24
30
31
No connect.
Ground.
NC
No connect.
Ground.
47
25
32
DD7
I/O[5]
48
26
33
GND
GND
Ground.
49
27
34
VCC
PWR
VCC. Connect to 3.3 V power source.
50
28
35
GND
GND
Ground.
51
52
N/A
N/A
NC
NC
53
N/A
N/A
VCC
PWR
O/Z[5]
No connect.
VCC. Connect to 3.3 V power source.
54
29
36
DIOW#[6]
55
30
37
DIOR#
O/Z[5] Driven HIGH ATA control.
(CMOS)
56
31
38
DMACK#
O/Z[5] Driven HIGH ATA control.
(CMOS)
57
N/A
N/A
NC
NC
58
N/A
N/A
LOWPWR#
O
59
60
61
N/A
N/A
NC
NC
62
N/A
N/A
VBUSPWRD
I
63
64
N/A
N/A
NC
NC
65
N/A
N/A
GND
GND
Ground.
66
32
39
VCC
PWR
VCC. Connect to 3.3 V power source.
Driven HIGH ATA control.
(CMOS)
No connect.
USB suspend indicator. (See LOWPWR# on page 14).
No connect.
Input
Bus powered mode selector. (See VBUSPWRD on page 15).
No connect.
Notes
5. If byte 8, bit 4 of the EEPROM is set to ‘0’, the ATA interface pins are only active when VBUS_ATA_EN is asserted. See VBUS_ATA_ENABLE on page 15.
6. A ‘#’ sign after the pin name indicates that it is active LOW.
Document Number: 001-05809 Rev. *Q
Page 10 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 1. AT2LP Pin Descriptions (continued)
Note Italic pin names denote pin functionality during CY7C68300A compatibility mode
100
56
56
TQFP QFN SSOP
67
33
40
Pin Name
INTRQ
Pin Default State
Type at Startup
I[7]
[7]
Input
Pin Description
ATA interrupt request.
68
34
41
DA0
O/Z
69
35
42
DA1
O/Z[7] Driven HIGH ATA address.
after 2 ms
delay
70[8]
36[8]
43
DRVPWRVLD
(DA2)
71
37
44
CS0#
O/Z[7] Driven HIGH ATA chip select.
after 2 ms
delay
72
38
45
CS1#
O/Z[7] Driven HIGH ATA chip select.
after 2 ms
delay
73
39
46
74
40
47
ARESET#
O/Z[7]
ATA reset.
75
41
48
GND
GND
Ground.
76
N/A
N/A
NC
NC
77
42
49
RESET#
I
78
43
50
VCC
PWR
79
44
51
VBUS_ATA_ENABLE
(ATA_EN)
I
80
45
52
DD8
I/O[7]
High Z
ATA data bit 8.
DD9
I/O
[7]
High Z
ATA data bit 9.
DD10
I/O[7]
High Z
ATA data bit 10.
I/O[7]
High Z
ATA data bit 11.
81
82
46
47
53
54
I
Driven HIGH ATA address.
after 2 ms
delay
Input
Device presence detect. (See DRVPWRVLD on page 14).
Configurable logical polarity is controlled by EEPROM address
0x08. This pin must be pulled HIGH if functionality is not used.
Alternate function. Input when the EEPROM configuration byte
8 has bit 7 set to ‘1’. The input value is reported through EP1IN
(byte 0, bit 0).
DA2
O/Z[7] Driven HIGH ATA address.
(VBUS_PWR_VALID)
after 2 ms
delay
No connect.
Input
Chip reset (See RESET# on page 15).
VCC. Connect to 3.3 V power source.
Input
VBUS detection (See VBUS_ATA_ENABLE on page 15).
83
48
55
DD11
84
N/A
N/A
GND
85
N/A
N/A
VCC
PWR
86
87
N/A
N/A
NC
NC
88
89
90
91
92
93
36[8]
13[8]
54[8]
N/A
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
I/O[8]
General Purpose I/O pins (See GPIO Pins on page 14). The
GPIO pins must be tied to GND if functionality is not used.
94
N/A
N/A
GND
GND
Ground.
Ground.
VCC. Connect to 3.3 V power source.
No connect.
Notes
7. If byte 8, bit 4 of the EEPROM is set to ‘0’, the ATA interface pins are only active when VBUS_ATA_EN is asserted. See VBUS_ATA_ENABLE on page 15.
8. The General Purpose inputs can be enabled on ATAPUEN, PWR500#, and DRVPWRVLD via EEPROM byte 8, bit 7 on CY7C68320C/CY7C68321C.
Document Number: 001-05809 Rev. *Q
Page 11 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 1. AT2LP Pin Descriptions (continued)
Note Italic pin names denote pin functionality during CY7C68300A compatibility mode
100
56
56
TQFP QFN SSOP
95
49
56
Pin Name
Pin Default State
Type at Startup
Pin Description
DD12
I/O[9]
High Z
ATA data bit 12.
[9]
96
50
1
DD13
I/O
High Z
ATA data bit 13.
97
51
2
DD14
I/O[9]
High Z
ATA data bit 14.
[9]
High Z
ATA data bit 15.
98
52
3
DD15
I/O
99
53
4
GND
GND
5
ATAPUEN
(NC)
I/O
[10]
100
54
[10]
Ground.
Bus powered ATA pull up voltage source (see ATAPUEN on
page 15).
Alternate function: General purpose input when the EEPROM
configuration byte 8 has bit 7 set to ‘1’. The input value is reported
through EP1IN (byte 0, bit 2).
Notes
9. If byte 8, bit 4 of the EEPROM is set to ‘0’, the ATA interface pins are only active when VBUS_ATA_EN is asserted. See VBUS_ATA_ENABLE on page 15.
10. The General Purpose inputs can be enabled on ATAPUEN, PWR500#, and DRVPWRVLD via EEPROM byte 8, bit 7 on CY7C68320C/CY7C68321C.
Document Number: 001-05809 Rev. *Q
Page 12 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Additional Pin Descriptions
GND as shown in Figure 6. If an alternate clock source is used,
apply it to XTALIN and leave XTALOUT unconnected.
The following sections provide additional pin information.
Figure 6. XTALIN/XTALOUT Diagram
DPLUS, DMINUS
DPLUS and DMINUS are the USB signaling pins; they must be
tied to the D+ and D– pins of the USB connector. Because they
operate at high frequencies, the USB signals require special
consideration when designing the layout of the PCB. See
General PCB Layout Recommendations for USB Mass Storage
Designs on page 41 for PCB layout recommendations.
24MHz Xtal
12pF
12pF
When RESET# is released, the assertion of the internal pull up
on D+ is gated by a combination of the state of the
VBUS_ATA_ENABLE pin, the value of configuration address
0x08 bit 0 (DRVPWRVLD Enable), and the detection of a
non-removable ATA/ATAPI drive on the IDE bus. See Table 2 for
a description of this relationship.
Table 2. D+ Pull Up Assertion Dependencies
VBUS_ATA_EN
1
DRVPWRVLD Enable Bit
ATA/ATAPI Drive Detected
1
1
1
0
1
1
0
0
1
1
Yes
No
Yes
No
Yes
No
1
1
1
0
0
0
State of D+ pull up
XTALIN
0
SCL, SDA
The clock and data pins for the I2C port must be connected to
the configuration EEPROM and to 2.2K pull up resistors tied to
VCC. If no EEPROM is used in the design, the SCL and SDA pins
must still be connected to pull up resistors. The SCL and SDA
pins are active for several milliseconds at startup.
XTALIN, XTALOUT
The AT2LP requires a 24 MHz (100 ppm) signal to derive
internal timing. Typically, a 24 MHz (12 pF, 500 W,
parallel-resonant, fundamental mode) crystal is used, but a
24 MHz square wave (3.3 V, 50/50 duty cycle) from another
source can also be used. If a crystal is used, connect its pins to
XTALIN and XTALOUT, and also through 12 pF capacitors to
XTALOUT
SYSIRQ
The SYSIRQ pin provides a way for systems to request service
from host software by using the USB interrupt pipe on endpoint
1 (EP1). If the AT2LP has no pending interrupt data to return,
USB interrupt pipe data requests are NAK’ed. If pending data is
available, the AT2LP returns 16 bits of data. This data indicates
whether AT2LP is operating in high speed or full speed, whether
the AT2LP is reporting self powered or bus powered operation,
and the states of any GPIO pins that are configured as inputs.
GPIO pins can be individually set as inputs or outputs, with byte
0x09 of the configuration data. The state of any GPIO pin that is
not set as an input is reported as ‘0’ in the EP1 data.
Table 3 gives the bitmap for the data returned on the interrupt
pipe and Figure 7 on page 14 depicts the latching algorithm
incorporated by the AT2LP.
The SYSIRQ pin must be pulled LOW if HID functionality is used.
Refer to HID Functions for Button Controls on page 16 for more
details on HID functionality.
Table 3. Interrupt Data Bitmap
5
4
3
2
1
0
7
6
5
4
3
2
RESERVED
RESERVED
RESERVED
RESERVED
USB High Speed
VBUS Powered
RESERVED
RESERVED
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
Document Number: 001-05809 Rev. *Q
1
0
GPIO[0]
6
GPIO[1]
7
RESERVED
EP1 Data Byte 0
RESERVED
EP1 Data Byte 1
Page 13 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Figure 7. SYSIRQ Latching Algorithm
No
No
USB Interrupt
Pipe Polled?
SYSIRQ=1?
Yes
Yes
Yes
Int_Data = 1?
Latch State of IO Pins
Set Int_Data = 1
No
No
NAK Request
Yes
Int_Data = 0
and
SYSIRQ=0?
Return Interrupt Data
Set Int_Data = 0
DRVPWRVLD
GPIO Pins
When this pin is enabled with bit 0 of configuration address 0x08
(DRVPWRVLD Enable), the AT2LP informs the host that a
removable device, such as a CF card, is present. The AT2LP
uses DRVPWRVLD to detect that the removable device is
present. Pin polarity is controlled by bit 1 of configuration
address 0x08. When DRVPWRVLD is deasserted, the AT2LP
reports a “no media present” status (ASC = 0x3A, ASQ = 0x00)
when queried by the host. When the media is detected again, the
AT2LP reports a “media changed” status to the host
(ASC = 0x28, ASQ = 0x00) when queried.
The GPIO pins enable a general purpose input and output
interface. There are several different interfaces to the GPIO pins:
When a removable device is used, it is always considered by the
AT2LP to be the IDE master device. Only one removable device
may be attached to the AT2LP. If the system only contains a
removable device, bit 6 of configuration address 0x08 (Search
ATA Bus) must be set to ‘0’ to disable ATA device detection at
startup. If a non-removable device is connected in addition to a
removable media device, the non removable device must be
configured as IDE slave (device address 1).
Document Number: 001-05809 Rev. *Q
■
Configuration bytes 0x09 and 0x0A contain the default settings
for the GPIO pins upon initial AT2LP configuration.
■
The host can modify the settings of the GPIO pins during
operation. This is done with vendor-specific commands
described in Programming the EEPROM on page 35.
■
The status of the GPIO pins is returned on the interrupt endpoint
(EP1) in response to a SYSIRQ. See SYSIRQ on page 13 for
SYSIRQ details.
LOWPWR#
LOWPWR# is an output pin that is driven to ‘0’ when the AT2LP
is not in suspend. LOWPWR# is placed in High Z when the
AT2LP is in a suspend state. This pin only indicates the state of
the AT2LP and must not be used to determine the status of the
USB host because of variations in the behavior of different hosts.
Page 14 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
ATA Interface Pins
VBUSPWRD
The ATA Interface pins must be connected to the corresponding
pins on an IDE connector or mass storage device. To enable
sharing of the IDE bus with other master devices, the AT2LP can
place all ATA Interface Pins in a High Z state whenever
VBUS_ATA_ENABLE is not asserted. Enabling this feature is
done by setting bit 4 of configuration address 0x08 to ‘1’.
Otherwise, the ATA bus is driven by the AT2LP to a default
inactive state whenever VBUS_ATA_ENABLE is not asserted.
VBUSPWRD is used to indicate self or bus powered operation.
Some designs require the ability to operate in either self- or bus
powered modes. The VBUSPWRD input pin enables these
devices to switch between self powered and bus powered modes
by changing the contents of the bMaxPower field and the self
powered bit in the reported configuration descriptors (see
Table 4).
Design practices for signal integrity as outlined in the
ATA/ATAPI-6 specification must be followed with systems that
use a ribbon cable interconnect between the AT2LP’s ATA
interface and the attached mass storage device, especially if
Ultra DMA Mode is used.
VBUS_ATA_ENABLE
VBUS_ATA_ENABLE is typically used to indicate to the AT2LP
that power is present on VBUS. This pin is polled by the AT2LP
at startup and then every 20 ms thereafter. If this pin is ‘0’, the
AT2LP releases the pull up on D+ as required by the USB
specification.
Also, if bit 4 of configuration address 0x08 is ‘1’, the ATA interface
pins are placed in a High Z state when VBUS_ATA_ENABLE is
‘0’. If bit 4 of configuration address 0x08 is ‘0’, the ATA interface
pins are still driven when VBUS_ATA_ENABLE is ‘0’.
ATAPUEN
This output can be used to control the required host pull up
resistors on the ATA interface in a bus powered design to
minimize unnecessary power consumption when the AT2LP is in
suspend. ATAPUEN is driven to ‘0’ when the ATA bus is inactive.
ATAPUEN is driven to ‘1’ when the ATA bus is active. ATAPUEN
is set to a High Z state along with all other ATA interface pins if
VBUS_ATA_ENABLE is deasserted and the ATA_EN
functionality (bit 4 of configuration address 0x08) is enabled (0).
ATAPUEN can also be configured as a GPIO input. See
HID Functions for Button Controls on page 16 for more
information on HID functionality.
PWR500#
The AT2LP asserts PWR500# to indicate that VBUS current may
be drawn up to the limit specified by the bMaxPower field of the
USB configuration descriptors. If the AT2LP enters a low-power
state, PWR500# is deasserted. When normal operation is
resumed, PWR500# is restored. The PWR500# pin must never
be used to control power sources for the AT2LP. In the 56-pin
package, PWR500# only functions during bus powered
operation.
PWR500# can also be configured as a GPIO input. See
HID Functions for Button Controls on page 16 for more
information on HID functionality.
Document Number: 001-05809 Rev. *Q
Note that current USB host drivers do not poll the device for this
information, so the effect of this pin is only seen on a USB or
power on reset.
Table 4. Behavior of Descriptor Data that is Dependent Upon
VBUSPWRD State
VBUSPWRD
VBUSPWRD = ‘0’ N/A (56-pin)
Pin
VBUSPWRD = ‘1’
bMaxPower
Reported
Value
0xFA
(500 mA)
0x01
(2 mA)
The value
from
configuration
address 0x34
is used.
bmAttributes
Bit 6
Reported
Value
‘0’
(bus powered)
‘1’
(self powered)
‘0’ if
bMaxPower
0x01
‘1’ if
bMaxPower
0x01
RESET#
Asserting RESET# for 10 ms resets the entire AT2LP. In self
powered designs, this pin is normally tied to VCC through a 100k
resistor, and to GND through a 0.1 F capacitor, as shown in
Figure 8.
Cypress does not recommend an RC reset circuit for bus
powered devices because of the potential for VBUS voltage
drop, which may result in a startup time that exceeds the USB
limit. Refer to the application note titled EZ-USB
FX2/AT2/SX2 Reset and Power Considerations, at
www.cypress.com, for more information.
While the AT2LP is in reset, all pins are held at their default
startup state.
Figure 8. R/C Reset Circuit for Self Powered Designs
100K
RESET#
0.1F
Page 15 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
HID Functions for Button Controls
Cypress’s CY7C68320C/CY7C68321C has the capability of
supporting Human Interface Device (HID) signaling to the host.
If there is an HID descriptor in the configuration data, the GPIO
pins that are set as inputs are polled by the AT2LP logic
approximately every 17 ms (depending on other internal interrupt
routines). If a change is detected in the state of any HID-enabled
GPIO, an HID report is sent through EP1 to the host. The report
format for byte 0 and byte 1 is shown in Table 5.
The ability to add buttons to a mass storage solution opens new
applications for data backup and other device-side notification to
the host. The AT2LP Blaster software, found in the CY4615B
files, provides an easy way to enable and modify the HID
features of the AT2LP.
GPIO pins can be individually set as inputs or outputs, with byte
0x09 of the configuration data, enabling a mix of HID and general
purpose outputs. GPIOs that are not configured as inputs are
reported with a value of ‘0’ in the HID data. The RESERVED bits’
values must be ignored, and Cypress recommends using a
bitmask in software to filter out unused HID data.
Note that if using the 56-pin package, the reported GPIO[5:3]
values must be ignored because the pins are not actually
present.
Table 5. HID Data Bitmap
1
0
7
6
RESERVED
RESERVED
RESERVED
RESERVED
USB High Speed
VBUS Powered
RESERVED
RESERVED
Functional Overview
Chip functionally is described in the subsequent sections.
USB Signaling Speed
5
4
3
2
1
0
GPIO[0]
2
GPIO[1]
3
GPIO[2]
4
GPIO[3]
5
GPIO[4]
6
GPIO[5]
7
RESERVED
USB Interrupt Data Byte 0
RESERVED
USB Interrupt Data Byte 1
Specification for information on Command Block formatting.
Additionally, the AT2LP translates ATAPI SFF-8070i commands
to ATA commands for seamless integration of ATA devices with
generic Mass Storage Class BOT drivers.
ATA Command Block (ATACB)
AT2LP operates at the following two rates defined in the USB 2.0
Specification dated April 27, 2000:
■
Full-speed, with a signaling bit rate of 12 Mbits/sec.
■
High-speed, with a signaling bit rate of 480 Mbits/sec.
AT2LP does not operate at the low-speed signaling rate of
1.5 Mbits/sec.
ATA Interface
The ATA/ATAPI port on the AT2LP is compatible with the
Information Technology–AT Attachment with Packet Interface–6
(ATA/ATAPI-6) Specification, T13/1410D Revision 2A. The
AT2LP supports both ATAPI packet commands and ATA
commands (by use of ATA Command Blocks), as outlined in
ATA Command Block (ATACB) on page 16. Refer to the USB
Mass Storage Class (MSC) Bulk-Only Transport (BOT)
The ATA Command Block (ATACB) functionality provides a
means of passing ATA commands and ATA register accesses to
the attached device for execution. ATACB commands are
transferred in the Command Block Wrapper Command Block
(CBWCB) portion of the Command Block Wrapper (CBW). The
ATACB is distinguished from other command blocks by having
the first two bytes of the command block match the
bVSCBSignature and bVSCBSubCommand values that are
defined in Table 6. Only command blocks that have a valid
bVSCBSignature and bVSCBSubCommand are interpreted as
ATA Command Blocks. All other fields of the CBW and
restrictions on the CBWCB remain as defined in the USB Mass
Storage Class Bulk-Only Transport Specification. The ATACB
must be 16 bytes in length. The following table and text defines
the fields of the ATACB.
Table 6. ATACB Field Descriptions
Byte
Field Name
Field Description
0
bVSCBSignature
This field indicates to the CY7C68300C/CY7C68301C that the ATACB contains
a vendor-specific command block. The value of this field must match the value
in EEPROM address 0x04 for the command to be recognized as a vendor-specific
ATACB command.
1
bVSCBSubCommand
This field must be set to 0x24 for ATACB commands.
Document Number: 001-05809 Rev. *Q
Page 16 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 6. ATACB Field Descriptions (continued)
Byte
2
Field Name
bmATACBActionSelect
Field Description
This field controls the execution of the ATACB according to the bitfield values:
Bit 7 IdentifyPacketDevice – This bit indicates that the data phase of the
command contains ATAPI (0xA1) or ATA (0xEC) IDENTIFY device data. Setting
IdentifyPacketDevice when the data phase does not contain IDENTIFY device
data results in unspecified device behavior.
0 = Data phase does not contain IDENTIFY device data
1 = Data phase contains ATAPI or ATA IDENTIFY device data
Bit 6 UDMACommand – This bit enables supported UDMA device transfers.
Setting this bit when a non-UDMA capable device is attached results in undetermined behavior.
0 = Do not use UDMA device transfers (only use PIO mode)
1 = Use UDMA device transfers
Bit 5 DEVOverride – This bit determines whether the DEV bit value is taken from
the value assigned to the LUN during startup or from the ATACB.
0 = The DEV bit is taken from the value assigned to the LUN during startup
1 = The DEV bit is taken from the ATACB field 0x0B, bit 4
Bit 4 DErrorOverride – This bit controls the device error override feature. This bit
must not be set during a bmATACBActionSelect TaskFileRead.
0 = Data accesses are halted if a device error is detected
1 = Data accesses are not halted if a device error is detected
Bit 3 PErrorOverride – This bit controls the phase error override feature. This bit
must not be set during a bmATACBActionSelect TaskFileRead.
0 = Data accesses are halted if a phase error is detected
1 = Data accesses are not halted if a phase error is detected
Bit 2 PollAltStatOverride – This bit determines whether or not the Alternate Status
register is polled and the BSY bit is used to qualify the ATACB operation.
0 = The AltStat register is polled until BSY=0 before proceeding with the ATACB
operation
1 = The ATACB operation is executed without polling the AltStat register.
Bit 1 DeviceSelectionOverride – This bit determines when the device selection is
performed in relation to the command register write accesses.
0 = Device selection is performed before command register write accesses
1 = Device selection is performed following command register write accesses
Bit 0 TaskFileRead – This bit determines whether or not the TaskFile register data
selected in bmATACBRegisterSelect is returned. If this bit is set, the dCBWDataTransferLength field must be set to 8.
0 = Execute ATACB command and data transfer (if any)
1 = Only read TaskFile registers selected in bmATACBRegisterSelect and return
0x00h for all others. The format of the 8 bytes of returned data is as follows:
❐ Address offset 0x00 (0x3F6) – Alternate Status
❐ Address offset 0x01 (0x1F1) – Features/Error
❐ Address offset 0x02 (0x1F2) – Sector Count
❐ Address offset 0x03 (0x1F3) – Sector Number
❐ Address offset 0x04 (0x1F4) – Cylinder Low
❐ Address offset 0x05 (0x1F5) – Cylinder High
❐ Address offset 0x06 (0x1F6) – Device/Head
❐ Address offset 0x07 (0x1F7) – Command/Status
Document Number: 001-05809 Rev. *Q
Page 17 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 6. ATACB Field Descriptions (continued)
Byte
3
Field Name
bmATACBRegisterSelect
Field Description
This field controls which of the TaskFile register read or write accesses occur.
TaskFile read data is always 8 bytes in length, and unselected register data are
returned as 0x00. Register accesses occur in sequential order as outlined here
(0 to 7):
Bit 0 (0x3F6) Device Control/Alternate Status
Bit 1 (0x1F1) Features/Error
Bit 2 (0x1F2) Sector Count
Bit 3 (0x1F3) Sector Number
Bit 4 (0x1F4) Cylinder Low
Bit 5 (0x1F5) Cylinder High
Bit 6 (0x1F6) Device/Head
Bit 7 (0x1F7) Command/Status
4
5–12
bATACBTransferBlockCount
This value indicates the maximum requested block size be in 512-byte
increments. This value must be set to the last value used for the ’Sectors per
block’ in the SET_MULTIPLE_MODE command. Legal values are 0, 1, 2, 4, 8,
16, 32, 64, and 128 where ‘0’ indicates 256 sectors per block. A command failed
status is returned if an illegal value is used in the ATACB.
bATACBTaskFileWriteData
These bytes contain ATA register data used with ATA command or PIO write
operations. Only registers selected in bmATACBRegisterSelect are required to
hold valid data when accessed. The registers are as follows.
ATACB Address Offset 0x05 (0x3F6) – Device Control
ATACB Address Offset 0x06 (0x1F1) – Features
ATACB Address Offset 0x07 (0x1F2) – Sector Count
ATACB Address Offset 0x08 (0x1F3) – Sector Number
ATACB Address Offset 0x09 (0x1F4) – Cylinder Low
ATACB Address Offset 0x0A (0x1F5) – Cylinder High
ATACB Address Offset 0x0B (0x1F6) – Device
ATACB Address Offset 0x0C (0x1F7) – Command
13–15
Reserved
Document Number: 001-05809 Rev. *Q
These bytes must be set to 0x00 for ATACB commands.
Page 18 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Operating Modes
The different modes of operation and EEPROM information are presented in the following sections.
Operational Mode Selection Flow
During the power up sequence, the AT2LP queries the I2C bus for an EEPROM. The AT2LP then selects a pinout configuration as
shown here, and checks to see if ARESET# is configured for Board Manufacturing Test Mode.
■
If no EEPROM is detected, the AT2LP uses the values in the factory-programmable (fused) memory space. See Fused Memory
Data on page 20 for more information. This is not a valid mode of operation if no factory programming has been done.
■
If an EEPROM signature of 0x4D4D is found, the CY7C68300C/CY7C68301C uses the same pinout and EEPROM format as the
CY7C68300A (EZ-USB AT2+).
■
If an EEPROM signature of 0x534B is found, the AT2LP uses the values stored in the EEPROM to configure the USB descriptors
for normal operation.
■
If an EEPROM is detected, but an invalid signature is read, the AT2LP defaults into Board Manufacturing Test Mode.
Figure 9. Operational Mode Selection Flow
Check I2C Bus
No
EEPROM
Found?
Yes
No
Signature
0x534B?
Signature
0x4D4D?
Yes
Yes
Set
EZ-USB AT2+
(CY7C68300A)
Pinout
Set
EZ-USB AT2LP
Pinout
VBUS_ATA_ENABLE
Load Fused
Memory Data
(AT2LP Pinout)
No
Pin HIGH?
Yes
ARESET#
Pin LOW?
No
Yes
DD7 Pin Set
HIGH
ARESET#
Pin HIGH?
No
Yes
Board Manufacturing
Test Mode
Document Number: 001-05809 Rev. *Q
Normal Mass
Storage Mode
Page 19 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Fused Memory Data
command for EEPROM accesses (CfgCB) and one for board
level testing (MfgCB), as described in the following sections.
When no EEPROM is detected at startup, the AT2LP
enumerates with the VID/PID/DID values that are stored in the
fused memory space. These values can be programmed into the
AT2LP during chip manufacturing for high volume applications to
avoid the need for an external EEPROM in some designs.
Contact your local Cypress Semiconductor sales office for more
information on this feature.
There is a convenient method available for starting the AT2LP in
Board Manufacturing Test Mode to enable reprogramming of
EEPROMs without a mass storage device attached. If the ATA
Reset (ARESET#) line is LOW on power up, the AT2LP enters
Board Manufacturing Test Mode. It is recommended that a
10k resistor be used to pull ARESET# to LOW. An easy way to
pull the ARESET# line LOW is to short pins 1 and 3 on the 40-pin
ATA connector with a 10k resistor, that ties the ARESET# line to
the required pull down on DD7.
If no factory programming has been done, the values returned
from the fused memory space would all be 0x00, which is not a
valid mode of operation. In this case the chip uses the
manufacturing mode and return the default descriptors (VID/PID
of 0x4B4/0x6830). An EEPROM must be used with designs that
do not use factory-programmed chips to identify the device as
your company’s product.
CfgCB
The cfg_load and cfg_read vendor-specific commands are
passed down through the bulk pipe in the CBWCB portion of the
CBW. The format of this CfgCB is shown as follows. Byte 0 is a
vendor-specific command designator whose value is
configurable and set in the configuration data (address 0x04).
Byte 1 must be set to 0x26 to identify it as a CfgCB command.
Byte2 is reserved and must be set to zero. Byte 3 is used to
determine the memory source to write/read. For the AT2LP, this
byte must be set to 0x02, indicating the EEPROM is present.
Bytes 4 and 5 are used to determine the start address, which
must always be 0x0000. Bytes 6 through 15 are reserved and
must be set to zero.
Normal Mass Storage Mode
In Normal Mass Storage Mode, the chip behaves as a USB 2.0
to ATA/ATAPI Bridge. This includes all typical USB device states
such as powered and configured. The USB descriptors are
returned according to the values stored in the external EEPROM
or fused memory space. A unique serial number is required for
Mass Storage Class Bulk-Only Transport compliance, which is
one reason why an EEPROM or factory-programmed part is
needed.
The data transferred to the EEPROM must be in the format
specified in Table 11 on page 23 of this data sheet. Maximum
data transfer size is 255 bytes.
Board Manufacturing Test Mode
In Board Manufacturing Test Mode the AT2LP behaves as a
USB 2.0 device but the ATA/ATAPI interface is not fully active.
This mode must not be used for mass storage operation in a
finished design. In this mode, the AT2LP enable reading from
and writing to the EEPROM, and for board level testing, through
vendor- specific ATAPI commands utilizing the CBW Command
Block as described in the USB Mass Storage Class Bulk-Only
Transport Specification. There is a vendor-specific ATAPI
The data transfer length is determined by the CBW Data Transfer
Length
specified
in
bytes
8
through
11
(dCBWDataTransferLength) of the CBW (refer to Table 7). The
type/direction of the command is determined by the direction bit
specified in byte 12, bit 7 (bmCBWFlags) of the CBW (refer to
Table 7).
Table 7. Command Block Wrapper
Bits
Offset
7
6
5
4
3
0–3
DCBWSignature
4–7
dCBWTag
8–11 (08h–0Bh)
0
bwCBWFLAGS
Dir
14 (0Eh)
1
dCBWDataTransferLength
12 (0Ch)
13 (0Dh)
2
Obsolete
Reserved (0)
Reserved (0)
Reserved (0)
15–30 (0Fh1Eh)
Document Number: 001-05809 Rev. *Q
bCBWLUN
bCBWCBLength
CBWCB (CfgCB or MfgCB)
Page 20 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 8. Example CfgCB
Offset
CfgCB Byte Description
Bits
7
6
5
4
3
2
1
0
0
bVSCBSignature (set in configuration bytes)
0
0
1
0
0
1
0
0
1
bVSCBSubCommand (must be 0x26)
0
0
1
0
0
1
1
0
2
Reserved (must be set to zero)
0
0
0
0
0
0
0
0
3
Data Source (must be set to 0x02)
0
0
0
0
0
0
1
0
4
Start Address (LSB) (must be set to zero)
0
0
0
0
0
0
0
0
5
Start Address (MSB) (must be set to zero)
0
0
0
0
0
0
0
0
6–15
Reserved (must be set to zero)
0
0
0
0
0
0
0
0
MfgCB
Mfg_read
The mfg_load and mfg_read vendor-specific commands are
passed down through the bulk pipe in the CBWCB portion of the
CBW. The format of this MfgCB is shown as follows. Byte0 is a
vendor-specific command designator whose value is
configurable and set in the AT2LP configuration data. Byte 1
must be 0x27 to identify a MfgCB. Bytes 2 through 15 are
reserved and must be set to zero.
This USB request returns a ’snapshot’ of select AT2LP input
pins. AT2LP input pins not directly associated with USB
operation can be sampled at any time during Manufacturing Test
Mode operation. See Table 10 for an explanation of the
Mfg_read data format. Any data length can be specified, but only
bytes 0 through 3 contain usable information, so a length of
4 bytes is recommended.
The data transfer length is determined by the CBW Data Transfer
Length
specified
in
bytes
8
through
11
(dCBWDataTransferLength) of the CBW. The type and direction
of the command is determined by the direction bit specified in
byte 12, bit 7 (bmCBWFlags) of the CBW.
Table 10. Mfg_read and Mfg_load Data Format
Byte
Bits
Read/Load
0
7
R/L
Table 9. Example MfgCB
Offset
MfgCB Byte Description
Bits
7 6 5 4 3 2 1 0
0
1
0 bVSCBSignature
(set in configuration bytes)
0 0 1 0 0 1 0 0
1 bVSCBSubCommand
(hardcoded 0x27)
0 0 1 0 0 1 1 1
1
2–15 2–15 Reserved (must be zero) 0 0 0 0 0 0 0 0
6
R
5:4
R/L
Document Number: 001-05809 Rev. *Q
DA2
CS#[1:0]
3
R/L
DRVPWRVLD
2:1
R/L
DA[1:0]
0
R
INTRQ
7
L
DD[15:0] High Z Status
0 = High Z all DD pins
1 = Drive DD pins
6
R
MFG_SEL
0 = Mass Storage Mode
1 = Manufacturing Mode
5
R
VBUS_ATA_ENABLE
4
R
DMARQ
3
R
IORDY
2
R/L
DMACK#
1
R/L
DIOR#
Mfg_load
During a Mfg_load, the AT2LP enters into Manufacturing Test
Mode. Manufacturing Test Mode is provided as a means to
implement board or system level interconnect tests. During
Manufacturing Test Mode operation, all outputs not directly
associated with USB operation are controllable. Normal control
of the output pins are disabled. Control of the select AT2LP I/O
pins and their tri-state controls are mapped to the ATAPI data
packet associated with this request. (See Table 10 for an
explanation of the required Mfg_load data format.) Any data
length can be specified, but only bytes 0 through 3 are mapped
to pins, so a length of 4 bytes is recommended. To exit
Manufacturing Test Mode, a hard reset (toggle RESET#) is
required.
Function
ARESET#
0
R/L
DIOW#
2
7:0
R/L
DD[7:0]
3
7:0
R/L
DD[15:8]
Page 21 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
EEPROM Organization
2
The contents of the recommended 256-byte (2048-bit) I C
EEPROM are arranged as follows. In Table 11, the column
labeled ‘Required Contents’ contains the values that must be
used for proper operation of the AT2LP. The column labeled
‘Variable Contents’ contains suggested entries and values that
may vary (such as string lengths) according to the EEPROM
data. Some values, such as the Vendor ID, Product ID and
device serial number, must be customized to meet USB
compliance. The 'AT2LP Blaster' tool in the CY4615B kit can be
used to edit and program these values into an AT2LP-based
product (refer to Figure 10). The ‘AT2LP Primer’ tool can be used
to program AT2LP-based products in a manufacturing
environment and provides for serial number randomization. See
Board Manufacturing Test Mode on page 20 for details on how
to use vendor-specific ATAPI commands to read and program
the EEPROM.
The address pins on the serial EEPROM must be set such that
the EEPROM is at physical address 2 (A0 = 0, A1 = 1, A2 = 0)
or address 4 (A0 = 0, A1 = 0, A2 = 1) for EEPROM devices that
are internally byte-addressed memories. It is recommended that
the address pins be set this way even on EEPROMs that may
indicate that the address pins are internal no-connects.
Figure 10. Snapshot of ‘AT2LP Blaster’ Utility
Document Number: 001-05809 Rev. *Q
Page 22 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
Note Devices running in Backward Compatibility (CY7C68300A) Mode must use the CY7C68300A EEPROM organization, and not
the format shown in this document. Refer to the CY7C68300A data sheet for the CY7C68300A EEPROM format.
AT2LP Configuration
0x00
EEPROM signature byte 0
I2C EEPROM signature byte 0. This byte must be 0x53 for
proper AT2LP pin configuration.
0x53
0x01
EEPROM signature byte 1
I2C EEPROM signature byte 1. This byte must be 0x4B for
proper AT2LP pin configuration.
0x4B
0x02
APM Value
ATA Device Automatic Power Management Value. If an
attached ATA device supports APM and this field contains
other than 0x00, the AT2LP issues a SET_FEATURES
command to enable APM with this value during the drive initialization process. Setting APM value to 0x00 disables this
functionality. This value is ignored with ATAPI devices.
0x00
0x03
Reserved
Must be set to 0x00.
0x00
0x04
bVSCBSignature Value
Value in the first byte of the CBW CB field that designates that
the CB is to be decoded as vendor-specific ATA commands
instead of the ATAPI command block. See Functional
Overview on page 16 for more detail on how this byte is used.
0x24
0x07
0x05
Reserved
Bits 7:6
Enable mode page 8
Bit 5
Enable the write caching mode page (page 8). If this page is
enabled, Windows disables write caching by default, which
limits write performance.
0 = Disable mode page 8.
1 = Enable mode page 8.
Disable wait for INTRQ
Bit 4
Poll status register rather than waiting for INTRQ. Setting this
bit to ‘1’ improves USB BOT test results but may introduce
compatibility problems with some devices.
0 = Wait for INTRQ.
1 = Poll status register instead of using INTRQ.
BUSY Bit Delay
Bit 3
Enable a delay of up to 120 ms at each read of the DRQ bit
where the device data length does not match the host data
length. This enables the CY7C68300C/CY7C68301C to work
with most devices that incorrectly clear the BUSY bit before a
valid status is present.
0 = No BUSY bit delay.
1 = Use BUSY bit delay.
Short Packet Before Stall
Bit 2
Determines if a short packet is sent before the STALL of an IN
endpoint. The USB Mass Storage Class Bulk-Only
Specification enables a device to send a short or zero-length
IN packet before returning a STALL handshake for certain
cases. Certain host controller drivers may require a short
packet before STALL.
0 = Do not force a short packet before STALL.
1 = Force a short packet before STALL.
Document Number: 001-05809 Rev. *Q
Page 23 of 47
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CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
0x06
0x07
Configuration
Item Name
Configuration
Item Description
SRST Enable
Bit 1
Determines if the AT2LP is to do an SRST reset during drive
initialization. At least one reset must be enabled. Do not set
SRST to ‘0’ and Skip Pin Reset to ‘1’ at the same time.
0 = Do not perform SRST during initialization.
1 = Perform SRST during initialization.
Skip Pin Reset
Bit 0
Skip ARESET# assertion. When this bit is set, the AT2LP
bypasses ARESET# during any initialization other than power
up. Do not set SRST Enable to ‘0’ and Skip Pin Reset to ‘1’ at
the same time.
0 = Allow ARESET# assertion for all device resets.
1 = Disable ARESET# assertion except for chip reset cycles.
ATA UDMA Enable
Bit 7
Enable Ultra DMA data transfer support for ATA devices. If
enabled, and if the ATA device reports UDMA support for the
indicated modes, the AT2LP uses UDMA data transfers at the
highest negotiated rate possible.
0 = Disable ATA device UDMA support.
1 = Enable ATA device UDMA support.
ATAPI UDMA Enable
Bit 6
Enable Ultra DMA data transfer support for ATAPI devices. If
enabled, and if the ATAPI device reports UDMA support for
the indicated modes, the AT2LP uses UDMA data transfers at
the highest negotiated rate possible.
0 = Disable ATAPI device UDMA support.
1 = Enable ATAPI device UDMA support.
UDMA Modes
Bits 5:0
These bits select which UDMA modes are enabled. The
AT2LP operates in the highest enabled UDMA mode
supported by the device. The AT2LP supports UDMA modes
2, 3, and 4 only.
Bit 5 = Reserved. Must be set to ‘0’.
Bit 4 = Enable UDMA mode 4.
Bit 3 = Enable UDMA mode 3.
Bit 2 = Enable UDMA mode 2.
Bit 1 = Reserved. Must be set to ‘0’.
Bit 0 = Reserved. Must be set to ‘0’.
Reserved
Bits 7:3
Must be set to ‘0’.
Multiword DMA mode
Bit 2
This bit enables multiword DMA support. If this bit is set and
the drive supports it, multiword DMA is used.
PIO Modes
Bits 1:0
These bits select which PIO modes are enabled. Setting to ‘1’
enables use of that mode with the attached drive, if the drive
supports it. Multiple bits may be set. The AT2LP operates in
the highest enabled PIO mode supported by the device. The
AT2LP supports PIO modes 0, 3, and 4 only. PIO mode 0 is
always enabled and has no corresponding configuration bit.
Bit 1 = Enable PIO mode 4.
Bit 0 = Enable PIO mode 3.
Document Number: 001-05809 Rev. *Q
Required
Contents
Variable
Contents
0xD4
0x07
Page 24 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
0x08
Configuration
Item Name
Configuration
Item Description
BUTTON_MODE
Bit 7
Button mode (100-pin package only). Sets ATAPUEN,
PWR500# and DRVPWRVLD to become button inputs
returned on bits 2, 1, and 0 of EP1IN. This bit must be set to
‘0’ if the 56-pin packages are used.
0 = Disable button mode.
1 = Enable button mode.
SEARCH_ATA_BUS
Bit 6
Search ATA bus after RESET to detect non-removable ATA
and ATAPI devices. Systems with only a removable device
(such as CF readers) must set this bit to ‘0’. Systems with at
least one non-removable device must set this bit to ‘1’.
0 = Do not search for ATA devices.
1 = Search for ATA devices.
BIG_PACKAGE
Bit 5
Selects the 100- or 56-pin package pinout configuration. Using
the wrong pinout may result in unpredictable behavior.
0 = Use 56-pin package pinout.
1 = Use 100-pin package pinout.
ATA_EN
Bit 4
Drive ATA bus when AT2LP is in suspend. For designs in
which the ATA bus is shared between the AT2LP and another
ATA master (such as an MP3 player), the AT2LP can place the
ATA interface pins in a High Z state when it enters suspend.
For designs that do not share the ATA bus, the ATA signals
must be driven while the AT2LP is in suspend to avoid floating
signals.
0 = Drive ATA signals when AT2LP is in suspend.
1 = Set ATA signals to High Z when AT2LP is in suspend.
Reserved
Bit 3
Reserved. This bit must be set to ‘0’.
Reserved
Bit 2
Reserved. This bit must be set to ‘0’
Drive Power Valid Polarity
Bit 1
Configure the logical polarity of the DRVPWRVLD input pin.
0 = Active LOW (‘connector ground’ indication)
1 = Active HIGH (power indication from device)
Drive Power Valid Enable
Bit 0
Enable the DRVPWRVLD pin. When this pin is enabled, the
AT2LP enumerates a removable ATA device, such as
CompactFlash or MicroDrive, as the IDE master device.
Enabling this pin also affects other pins related to removable
device operation.
0 = Disable removable ATA device support.
1 = Enable removable ATA device support.
Document Number: 001-05809 Rev. *Q
Required
Contents
Variable
Contents
0x78
Page 25 of 47
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Table 11. Configuration Data Organization (continued)
Byte
Address
0x09
Configuration
Item Name
Reserved
General Purpose I/O Pin
Output Enable
0x0A
Reserved
GPIO Output Pin State
Configuration
Item Description
Required
Contents
Variable
Contents
Bits 7:6
Reserved. Must be set to zero.
Bits 5:0
GPIO[5:0] Input and output control. GPIOs can be individually
set as inputs or outputs using these bits.
0 = High Z (pin is an input). The state of the signal connected
to GPIO input pins is reported in the SYSIRQ or HID data.
1 = Output enabled (pin is an output). The state of GPIO output
pins is controlled by the value in address 0x0A.
0x00
Bits 7:6
Reserved. Must be set to zero.
Bits 5:0
These bits select the value driven on the GPIO pins that are
configured as outputs in configuration address 0x09.
0 = Drive the GPIO pin LOW
1 = Drive the GPIO pin HIGH
0x00
0x0B
LUN0 Identify String
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the LUN0
device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
0x00
0x0C
LUN1 Identify String
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the LUN1
device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
0x00
0x0D
Delay After Reset
Number of 20 ms ticks to wait between AT2LP startup or reset,
and the first attempt to access any drives.
0x00
0x0E
Reserved
Bits 7:5
Must be set to zero.
0x00
Bus Powered Flag
Bit 4
Enable bus powered HDD support. This bit enables the use of
DRVPWRVLD features without reporting the LUN0 device as
removable media.
0 = LUN0 is removable media or DRVPWRVLD is disabled
1 = LUN0 device is bus powered and non-removable
Enable CF UDMA
Bit 3
Enable UDMA transfers for removable devices. Some CF
devices interfere with UDMA transfers when more than one
drive is connected to the ATA bus.
0 = Do not use UDMA transfers with removable devices
(UDMA signals are not connected to the CF pins).
1 = Allow UDMA transfers to be used with removable devices
(UDMA signals are connected to the CF pins).
Fixed Number of Logical
Bits 2:1
Assume the presence of devices and do not perform a search
of the ATA bus to discover the number of LUNs.
00 = Search ATA bus and determine number of LUNs
01 = Assume only LUN0 present; no ATA bus search
10 = Assume LUN0 and LUN1 present; no ATA bus search
11 = Assume LUN0 and LUN1 present; no ATA bus search
Document Number: 001-05809 Rev. *Q
Page 26 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
0x0F
Configuration
Item Name
Configuration
Item Description
Required
Contents
Search ATA on VBUS
Bit 0
Search for ATA devices when VBUS returns. If this bit is set,
the ATA bus is searched for ATA devices every time
VBUS_ATA_ENABLE is asserted. This feature enables the
AT2LP to be used in designs where the drive may be physically
removed (such as docking stations or port replicators).
0 = Search ATA bus on VBUS_ATA_ENABLE assertion
1 = No ATA bus search on VBUS_ATA_ENABLE assertion
Reserved
Must be set to 0x00
0x00
Variable
Contents
Device Descriptor
0x10
bLength
Length of device descriptor in bytes
0x12
0x11
bDescriptor Type
Descriptor type.
0x01
0x12
bcdUSB (LSB)
USB Specification release number in BCD
0x00
0x13
bcdUSB (MSB)
0x02
0x14
bDeviceClass
Device class
0x00
0x15
bDeviceSubClass
Device subclass
0x00
0x16
bDeviceProtocol
Device protocol
0x00
0x17
bMaxPacketSize0
USB packet size supported for default pipe
0x40
0x18
idVendor (LSB)
0x19
idVendor (MSB)
Vendor ID. Cypress’ Vendor ID may only be used for
evaluation purposes, and not in released products.
Your
Vendor ID
0x1A
idProduct (LSB)
Product ID
0x1B
idProduct (MSB)
Your
Product ID
0x1C
bcdDevice (LSB)
Device release number in BCD LSB (product release number)
0x1D
bcdDevice (MSB)
Device release number in BCD MSB (silicon release number)
Your
release
number
0x1E
iManufacturer
Index to manufacturer string. This entry must equal half of the
address value where the string starts or 0x00 if the string does
not exist.
0x53
0x1F
iProduct
Index to product string. This entry must equal half of the
address value where the string starts or 0x00 if the string does
not exist.
0x69
0x20
iSerialNumber
Index to serial number string. This entry must equal half of the
address value where the string starts or 0x00 if the string does
not exist. The USB Mass Storage Class Bulk-Only Transport
Specification requires a unique serial number (in upper case,
hexadecimal characters) for each device.
0x75
0x21
bNumConfigurations
Number of configurations supported
1 for mass storage: 2 for HID: 3 for CSM
0x03
Device Qualifier
0x22
bLength
Length of device descriptor in bytes
0x0A
0x23
bDescriptor
Type Descriptor type
0x06
0x24
bcdUSB (LSB)
USB Specification release number in BCD
0x00
0x25
bcdUSB (MSB)
USB Specification release number in BCD
0x02
0x26
bDeviceClass
Device class
0x00
0x27
bDeviceSubClass
Device subclass
0x00
0x28
bDeviceProtocol
Device protocol
0x00
0x29
bMaxPacketSize0
USB packet size supported for default pipe
0x40
Document Number: 001-05809 Rev. *Q
Page 27 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
0x2A
bNumConfigurations
Number of configurations supported
0x01
0x2B
bReserved
Reserved for future use. Must be set to zero
0x00
Variable
Contents
Configuration Descriptor
0x2C
bLength
Length of configuration descriptor in bytes
0x09
0x2D
bDescriptorType
Descriptor type
0x02
0x2E
bTotalLength (LSB)
bTotalLength (MSB)
Number of bytes returned in this configuration. This includes
the configuration descriptor plus all the interface and endpoint
descriptors.
0x20
0x2F
0x30
bNumInterfaces
Number of interfaces supported
0x01
0x31
bConfiguration Value
The value to use as an argument to Set Configuration to select
the configuration. This value must be set to 0x01.
0x32
iConfiguration
Index to the configuration string. This entry must equal half of
the address value where the string starts, or 0x00 if the string
does not exist.
0x00
0x33
bmAttributes
Device attributes for this configuration
Bit 7 Reserved. Must be set to ‘1’
Bit 6 Self powered. See Table 4 on page 15 for reported value
Bit 5 Remote wakeup. Must be set to ‘0’
Bits 4–0 Reserved. Must be set to ‘0’
0xC0
0x34
bMaxPower
Maximum power consumption for this configuration. Units
used are mA*2 (i.e., 0x31 = 98 mA, 0xF9 = 498 mA). The value
entered here is only used by the 56-pin packages and affect
the reported value of bit 6 of address 0x33 in that case. See
Table 4 on page 15 for a description of what value is reported
to the host by the AT2LP.
0x01
0x00
0x01
Interface and Endpoint Descriptors
Interface Descriptor
0x35
bLength
Length of interface descriptor in bytes
0x36
bDescriptorType
Descriptor type
0x04
0x37
bInterfaceNumber
Interface number
0x00
0x38
bAlternateSetting
Alternate setting
0x00
0x39
bNumEndpoints
Number of endpoints
0x3A
bInterfaceClass
Interface class
0x3B
bInterfaceSubClass
Interface subclass
0x3C
bInterfaceProtocol
Interface protocol
0x3D
iInterface
Index to first interface string. This entry must equal half of the
address value where the string starts or 0x00 if the string does
not exist.
0x09
0x02
0x08
0x06
0x50
0x00
USB Bulk-Out Endpoint
0x3E
bLength
Length of this descriptor in bytes
0x07
0x3F
bDescriptorType
Endpoint descriptor type
0x05
0x40
bEndpointAddress
This is an out endpoint, endpoint number 2.
0x02
0x02
0x41
bmAttributes
This is a bulk endpoint.
0x42
wMaxPacketSize (LSB)
0x43
wMaxPacketSize (MSB)
Maximum data transfer size. To be set by speed (Full speed
0x0040; high-speed 0x0200)
0x44
bInterval
High speed interval for polling (maximum NAK rate)
Document Number: 001-05809 Rev. *Q
0x00
0x02
0x00
Page 28 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
USB Bulk In Endpoint
0x45
bLength
Length of this descriptor in bytes
0x07
0x46
bDescriptorType
Endpoint descriptor type
0x05
0x47
bEndpointAddress
This is an in endpoint, endpoint number 6
0x86
0x48
bmAttributes
This is a bulk endpoint
0x02
0x49
wMaxPacketSize (LSB)
0x4A
wMaxPacketSize (MSB)
Maximum data transfer size. Automatically set by AT2 (Full
speed 0x0040; high-speed 0x0200)
0x4B
bInterval
High speed interval for polling (maximum NAK rate)
0x00
0x02
0x00
(Optional) HID Interface Descriptor
0x4C
bLength
Length of HID interface descriptor
0x09
0x4D
bDescriptorTypes
Interface descriptor type
0x04
0x4E
bInterfaceNumber
Number of interfaces (2)
0x02
0x4F
bAlternateSetting
Alternate setting
0x00
0x50
bNumEndpoints
Number of endpoints used by this interface
0x01
0x51
bInterfaceClass
Class code
0x03
0x52
bInterfaceSubClass
Sub class
0x00
0x53
bInterfaceSubSubClass
Sub Sub class
0x00
0x54
iInterface
Index of string descriptor
0x00
USB Interrupt In Endpoint
0x5E
bLength
Length of this descriptor in bytes
0x07
0x5F
bDescriptorType
Endpoint descriptor type
0x05
0x60
bEndpointAddress
This is an In endpoint, endpoint number 1
0x81
0x61
bmAttributes
This is an interrupt endpoint
0x03
0x62
wMaxPacketSize (LSB)
Max data transfer size
0x02
0x63
wMaxPacketSize (MSB)
0x64
bInterval
0x00
Interval for polling (max NAK rate)
0x10
(Optional) HID Descriptor
0x55
bLength
Length of HID descriptor
0x09
0x56
bDescriptorType
Descriptor Type HID
0x21
HID Class Specification release number (1.10)
0x10
0x57
bcdHID (LSB)
0x58
bcdHID (MSB)
0x59
bCountryCode
Country Code
0x00
0x5A
bNumDescriptors
Number of class descriptors (1 report descriptor)
0x01
0x01
0x5B
bDescriptorType
Descriptor Type
0x22
0x5C
wDescriptorLength (LSB)
Length of HID report descriptor
0x22
0x5D
wDescriptorLength (MSB)
0x00
Terminator Descriptors
0x65
Terminator
Document Number: 001-05809 Rev. *Q
0x00
Page 29 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
(Optional) HID Report Descriptor
0x66
Usage_Page
Vendor defined
0x67
0x68
0x69
0xFF
Usage
Vendor defined
0x09
Collection
Application
0xA1
Usage
Vendor defined
0x09
0x6A
0x6B
0xA5
0x6C
0x6D
0x06
0xA0
0x01
0x6E
0xA6
Input Report
0x6F
Usage
Vendor defined
0x70
0x71
Logical_Minimum
–128
0x72
0x73
Logical_Maximum
127
Report_Size
8 bits
0x75
0x08
Report_Count
2 fields
0x78
0x79
0x25
0x7F
0x76
0x77
0x15
0x80
0x74
0x75
0x09
0xA7
0x95
0x02
Input
Input (Data, Variable, Absolute)
0x7A
0x81
0x02
Output Report
0x7B
Usage
Usage - vendor defined
Logical_Minimum
Logical Minimum (–128)
0x15
Logical_Maximum
Logical Maximum (127)
0x25
Report_Size
Report Size 8 bits
0x75
Report_Count
Report Count 2 fields
0x95
Output
Output (Data, Variable, Absolute)
0x91
End Collection
0xC0
0x7C
0x7D
0xA9
0x7E
0x7F
0x80
0x80
0x81
0x7F
0x82
0x83
0x08
0x84
0x85
0x09
0x02
0x86
0x02
0x87
Standard Content Security Interface Descriptor (optional)
0x88
bLength
Byte length of this descriptor
0x09
0x89
bDescriptorType
Interface Descriptor type
0x0D
0x8A
bInterfaceNumber
Number of interface
0x02
Document Number: 001-05809 Rev. *Q
Page 30 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
0x8B
bAlternateSetting
Value used to select an alternate setting for the interface
identified in prior field
0x00
0x8C
bNumEndpoints
0x02
0x8D
bInterfaceClass
Number of endpoints used by this interface (excluding
endpoint 0) that are CSM dependent
0x0D
0x8E
bInterfaceSubClass
Must be set to zero
0x00
0x8F
bInterfaceProtocol
Must be set to zero
0x00
0x90
iInterface
Index of a string descriptor that describes this Interface
0x00
Channel Descriptor
0x91
bLength
Length of this descriptor in bytes
0x09
0x92
bDescriptorType
Channel descriptor type
0x22
0x93
bChannelID
Number of the channel must be a zero-based value that is
unique across the device
0x00
0x94
bmAttributes
Bits7:5
Reserved. Must be set to zero
0x01
Bits 4:0
0x95
bRecipient
Identifier of the target recipient
If Recipient type field of bmAttributes = 1 then
bRecipient field is the bInterfaceNumber
If Recipient type field of bmAttributes = 2 then
bRecipient field is an endpoint address, where:
D7: Direction (0 = Out, 1 = IN)
D6...D4: Reserved and set to zero
D3...D0: Endpoint number
0x00
0x96
bRecipientAlt
Alternate setting for the interface to which this channel applies
0x00
0x97
bRecipientLogicalUnit
Recipient Logical Unit
0x00
0x98
bMethod
Index of a class-specific CSM descriptor that describes one of
the Content Security Methods (CSM) offered by the device
0x01
0x99
bMethodVariant
CSM variant descriptor
0x00
CSM Descriptor
0x9A
bLength
Byte length of this descriptor
0x06
0x9B
bDescriptorType
CSM descriptor type
0x23
0x9C
bMethodID
Index of a class-specific CSM descriptor that describes on of
the Content Security Methods offered by the device
0x01
0x9D
iCSMDescriptor
Index of string descriptor that describes the Content Security
Method
0x00
0x9E
bcdVersion (LSB)
CSM descriptor version number
0x10
0x9F
bcsVersion (MSB)
0xA0
Terminator
0x02
0x00
USB String Descriptor–Index 0 (LANGID)
0xA1
bLength
LANGID string descriptor length in bytes
0x04
0x03
0xA2
bDescriptorType
Descriptor type
0xA3
LANGID (LSB)
0xA4
LANGID (MSB)
Language supported. The CY7C68300B supports one
LANGID value.
Document Number: 001-05809 Rev. *Q
0x09
0x04
Page 31 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
USB String Descriptor–Manufacturer
0xA5
bLength
String descriptor length in bytes (including bLength)
0xA6
bDescriptorType
Descriptor type
0x2C
0xA7
bString
Unicode character LSB
’C’ 0x43
0xA8
bString
Unicode character MSB
0x00
0x03
0xA9
bString
Unicode character LSB
’y’ 0x79
0xAA
bString
Unicode character MSB
0x00
0xAB
bString
Unicode character LSB
’p’ 0x70
0xAC
bString
Unicode character MSB
0x00
0xAD
bString
Unicode character LSB
’r’ 0x72
0xAE
bString
Unicode character MSB
0x00
0xAF
bString
Unicode character LSB
’e’ 0x65
0xB0
bString
Unicode character MSB
0x00
0xB1
bString
Unicode character LSB
’s’ 0x73
0xB2
bString
Unicode character MSB
0x00
0xB3
bString
Unicode character LSB
’s’ 0x73
0xB4
bString
Unicode character MSB
0x00
0xB5
bString
Unicode character LSB
’ ’ 0x20
0xB6
bString
Unicode character MSB
0x00
0xB7
bString
Unicode character LSB
’S’ 0x53
0xB8
bString
Unicode character MSB
0x00
0xB9
bString
Unicode character LSB
’e’ 0x65
0xBA
bString
Unicode character MSB
0x00
0xBB
bString
Unicode character LSB
’m’ 0x6D
0xBC
bString
Unicode character MSB
0x00
0xBD
bString
Unicode character LSB
’i’ 0x69
0xBE
bString
Unicode character MSB
0x00
0xBF
bString
Unicode character LSB
’c’ 0x63
0xC0
bString
Unicode character MSB
0x00
0xC1
bString
Unicode character LSB
’o’ 0x6F
0xC2
bString
Unicode character MSB
0x00
0xC3
bString
Unicode character LSB
’n’ 0x6E
0xC4
bString
Unicode character MSB
0x00
0xC5
bString
Unicode character LSB
’d’ 0x64
0xC6
bString
Unicode character MSB
0x00
0xC7
bString
Unicode character LSB
’u’ 0x75
0xC8
bString
Unicode character MSB
0x00
0xC9
bString
Unicode character LSB
’c’ 0x63
0xCA
bString
Unicode character MSB
0x00
0xCB
bString
Unicode character LSB
’t’ 0x74
0xCC
bString
Unicode character MSB
0x00
0xCD
bString
Unicode character LSB
’o’ 0x6F
Document Number: 001-05809 Rev. *Q
Page 32 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
0xCE
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
bString
Unicode character MSB
0x00
0xCF
bString
Unicode character LSB
’r’ 0x72
0xD0
bString
Unicode character MSB
0x00
String descriptor length in bytes (including bLength)
0x2C
USB String Descriptor–Product
0xD1
bLength
0xD2
bDescriptorType
Descriptor type.
0xD3
bString
Unicode character LSB
0x03
0xD4
bString
Unicode character MSB
0x00
0xD5
bString
Unicode character LSB
’S’ 0x53
0xD6
bString
Unicode character MSB
0x00
0xD7
bString
Unicode character LSB
’B’ 0x42
’U’ 0x55
0xD8
bString
Unicode character MSB
0x00
0xD9
bString
Unicode character LSB
’2’ 0x32
0xDA
bString
Unicode character MSB
0x00
0xDB
bString
Unicode character LSB
’.’ 0x2E
0xDC
bString
Unicode character MSB
0x00
0xDD
bString
Unicode character LSB
’0’ 0x30
0xDE
bString
Unicode character MSB
0x00
0xDF
bString
Unicode character LSB
’ ’ 0x20
0xE0
bString
Unicode character MSB
0x00
0xE1
bString
Unicode character LSB
’D’ 0x53
0xE2
bString
Unicode character MSB
0x00
0xE3
bString
Unicode character LSB
’i’ 0x74
0xE4
bString
Unicode character MSB
0x00
0xE5
bString
Unicode character LSB
’s’ 0x6F
0xE6
bString
Unicode character MSB
0x00
0xE7
bString
Unicode character LSB
’k’ 0x72
0xE8
bString
Unicode character MSB
0x00
USB String Descriptor–Serial Number (Note The USB Mass Storage Class Specification requires a unique serial number in each
device. If you do not provide a unique serial number, the operating system may crash. The serial number must be at least 12
characters, but some USB hosts only use the least significant 12 characters of the serial number as a unique identifier.
0xE9
bLength
String descriptor length in bytes (including bLength).
0xEA
bDescriptor Type
Descriptor type.
0x22
0x03
0XEB
bString
Unicode character LSB
’1’ 0x31
0XEC
bString
Unicode character MSB
0x00
0XED
bString
Unicode character LSB
’2’ 0x32
0XEE
bString
Unicode character MSB
0x00
0XEF
bString
Unicode character LSB
’3’ 0x33
0XF0
bString
Unicode character MSB
0x00
0xF1
bString
Unicode character LSB
’4’ 0x34
0xF2
bString
Unicode character MSB
0x00
0xF3
bString
Unicode character LSB
’5’ 0x35
0xF4
bString
Unicode character MSB
0x00
Document Number: 001-05809 Rev. *Q
Page 33 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
0xF5
bString
Unicode character LSB
’6’ 0x36
0xF6
bString
Unicode character MSB
0x00
0xF7
bString
Unicode character LSB
’7’ 0x37
0xF8
bString
Unicode character MSB
0x00
0xF9
bString
Unicode character LSB
’8’ 0x38
0xFA
bString
Unicode character MSB
0x00
0xFB
bString
Unicode character LSB
’9’ 0x39
0xFC
bString
Unicode character MSB
0x00
0xFD
bString
Unicode character LSB
’0’ 0x30
0xFE
bString
Unicode character MSB
0x00
0xFF
bString
Unicode character LSB
’A’ 0x41
0Xxx
bString
Unicode character MSB
0x00
0Xxx
bString
Unicode character LSB
’B’ 0x42
0Xxx
bString
Unicode character MSB
0x00
Identify Device String (Note This is not a Unicode string. It is the ASCII string returned by the device in the Identify Device
information. It is a fixed length (24 bytes). Changing this string may cause CD authoring software to incorrectly identify the device.)
0Xxx
Device name byte 1
ASCII Character
’C’ 0x43
0Xxx
Device name byte 2
ASCII Character
’y’ 0x79
0Xxx
Device name byte 3
ASCII Character
’p’ 0x70
0Xxx
Device name byte 4
ASCII Character
’r’ 0x72
0Xxx
Device name byte 5
ASCII Character
’e’ 0x65
0Xxx
Device name byte 6
ASCII Character
’s’ 0x73
0Xxx
Device name byte 7
ASCII Character
’s’ 0x73
0Xxx
Device name byte 8
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 9
ASCII Character
’C’ 0x43
0Xxx
Device name byte 10
ASCII Character
’u’ 0x75
0Xxx
Device name byte 11
ASCII Character
’s’ 0x73
0Xxx
Device name byte 12
ASCII Character
’t’ 0x74
0Xxx
Device name byte 13
ASCII Character
’o’ 0x6f
0Xxx
Device name byte 14
ASCII Character
’m’ 0x6d
0Xxx
Device name byte 15
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 16
ASCII Character
’N’ 0x4e
0Xxx
Device name byte 17
ASCII Character
’a’ 0x61
0Xxx
Device name byte 18
ASCII Character
’m’ 0x6d
0Xxx
Device name byte 19
ASCII Character
’e’ 0x65
0Xxx
Device name byte 20
ASCII Character
’ ’ 0x20
0Xxx
Device name byte 21
ASCII Character
’L’ 0x4c
0Xxx
Device name byte 22
ASCII Character
’U’ 0x55
0Xxx
Device name byte 23
ASCII Character
’N’ 0x4e
0Xxx
Device name byte 24
ASCII Character
’0’ 0x30
0Xxx
Unused ROM Space
Amount of unused ROM space varies depending on strings.
0xFF
Note More than 0X100 bytes of configuration are shown for example only. The AT2LP only supports addresses up to 0xFF.
Document Number: 001-05809 Rev. *Q
Page 34 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Programming the EEPROM
LOAD_CONFIG_DATA
There are three methods of programming the EEPROM:
■
Stand-alone EEPROM programmer
This request enables writes to the AT2LP’s configuration data
space. The wIndex field specifies the starting address and the
wLength field denotes the data length in bytes.
■
Vendor-specific USB commands, listed in Table 12
Legal values for wValue are as follows:
■
In-system programming (for example, bed-of-nails tester)
■
0x0000 Internal Config bytes, address range 0x2 – 0xF
■
0x0002 External I2C memory device
Any vendor-specific USB write request to the serial ROM device
configuration space simultaneously update internal configuration
register values as well. If the I2C device is programmed without
vendor specific USB commands, the AT2LP must be
synchronously reset (toggle RESET#) before configuration data
is reloaded.
The AT2LP supports a subset of the ‘slow mode’ specification
(100 kHz) required for 24LCXXB EEPROM family device
support.
Features
such
as
‘Multi-Master’,
‘Clock
Synchronization’ (the SCL pin is output only), ‘10-bit addressing’,
and ‘CBUS device support’ are not supported. Vendor-specific
USB commands enable the AT2LP to address up to 256 bytes
of EEPROM data.
Internal Config byte writes must be constrained to addresses 0x2
through 0xF, as shown in Table 12. Attempts to write outside this
address space result in undefined operation. Internal Config byte
writes only overwrite AT2LP Configuration Byte registers, the
original data source (I2C memory device) remains unchanged.
Table 12. EEPROM-related Vendor-Specific Commands
Label
bmRequestType bRequest
LOAD_CONFIG_DATA
0x40
0x01
READ_CONFIG_DATA
0xC0
0x02
wValue
0x0000
Data Source
wIndex
30x02 – 0x0F
wLength
Data Length
Starting Address Data Length
Data
Configuration
Data
Configuration
Data
READ_CONFIG_DATA
This USB request enables data retrieval from the data source specified by the wValue field. Data is retrieved beginning at the address
specified by the wIndex field (see Table 12). The wLength field denotes the length in bytes of data requested from the data source.
Legal values for wValue are as follows:
■
0x0000
Configuration bytes, addresses 0x0 – 0xF only
■
0x0002
External I2C memory device
Illegal values for wValue result in an undefined operation. Attempted reads from an I2C memory device when none is connected result
in an undefined operation. Attempts to read configuration bytes with starting addresses greater than 0xF also, result in an undefined
operation.
Document Number: 001-05809 Rev. *Q
Page 35 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Absolute Maximum Ratings
Operating Conditions
Exceeding maximum ratings may impair the useful life of the
device. These user guidelines are not tested.
TA (Ambient Temperature Under Bias)
Commercial ................................................... 0 C to +70 C
Automotive ................................................. –40 C to +85 C
Storage Temperature ............................... –65 C to +150 C
Supply Voltage .........................................+3.00 V to +3.60 V
Ambient Temperature with Power Applied
Commercial ................................................... 0 C to +70 C
Automotive ................................................. –40 C to +85 C
Ground Voltage ................................................................ 0 V
Fosc (Oscillator or
Crystal Frequency) ...24 MHz ± 100 ppm, Parallel Resonant
Supply Voltage to Ground Potential .............–0.5 V to +4.0 V
DC Input Voltage to Any Input Pin .............................. 5.25 V
DC Voltage Applied to Outputs
in High Z State .................................... –0.5 V to VCC + 0.5 V
Power Dissipation .................................................... 300 mW
Static Discharge Voltage ......................................... > 2000 V
Max Output Current Per I/O Port
(D0-D7, D8-15, ATA control) ....................................... 10 mA
DC Characteristics
Parameter
Min
Typ
Max
Unit
Supply voltage
3.00
3.3
3.60
V
VCC Ramp
Supply ramp up 0 V to 3.3 V
200
–
–
s
VIH
Input High voltage
2
–
5.25
V
VIL
Input Low voltage
–0.5
–
0.8
V
II
Input leakage current
–
–
±10
A
VIH_X
Crystal input HIGH voltage
2
–
5.25
V
VIL_X
Crystal input LOW voltage
–0.5
–
0.8
V
VOH
Output voltage High
IOUT = 4 mA
2.4
–
–
V
VOL
Output voltage Low
IOUT = –4 mA
–
–
0.4
V
VCC
Description
Conditions
0 < VIH < VCC
IOH
Output current High
–
–
4
mA
IOL
Output current Low
–
–
4
mA
CIN
Input pin capacitance
All but DPLUS/DMINUS
–
–
10
pF
DPLUS/DMINUS
–
–
15
pF
ISUSP
ICC
Suspend current
Connected
–
0.5
1.2
mA
CY7C68300C/CY7C68320C
Disconnected
–
0.3
1.0
mA
Suspend current
Connected
–
300
380
A
CY7C68301C/CY7C68321C
Disconnected
–
100
150
A
Supply current
USB High Speed
–
50
85
mA
USB Full Speed
–
35
65
mA
–
43
–
mA
5.0
–
–
ms
200
–
–
s
IUNCONFIG
Unconfigured current
Current before device is granted full
amount requested in bMaxPower
TRESET
Reset time after valid power
VCC > 3.0 V
Pin reset after power up
Document Number: 001-05809 Rev. *Q
Page 36 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
AC Electrical Characteristics
ATA Timing Characteristics
USB Transceiver Characteristics
The ATA interface supports ATA PIO modes 0, 3, and 4, Ultra
DMA modes 2, 3, and 4, and multiword DMA mode 2, according
to the ATA/ATAPI 6 Specification. The highest enabled transfer
rate common to both the AT2LP and the attached mass storage
device is used. The AT2LP automatically determines the transfer
rates during drive initialization based upon the values in the
AT2LP configuration space and the data reported by the drives
in response to an IDENTIFY DEVICE command.
Complies with the USB 2.0 specification for full- and high speed
modes of operation.
Ordering Information
Part Number
Status
Package Type
GPIO Pins
CY7C68300C-56PVXC
–
56-pin SSOP Pb-free for self and bus powered designs
–
CY7C68300C-56LTXC
–
56-pin QFN Sawn Pb-free for self and bus powered designs
–
CY7C68320C-100AXC
–
100-pin TQFP Pb-free for self and bus powered designs
CY4615B
–
EZ-USB AT2LP Reference Design Kit
6
NA
Ordering Code Definitions
CY 7C683XXC -
XXXX
X
X
Temperature Range: X = C or A;
C = Commercial; A = Automotive Grade
X = Pb-free
Package Type: XXXX = 56PV or 56LT or 100A;
56PV = 56-pin SSOP;
56LT = 56-pin QFN;
100A =100-pin TQFP
Part Identifier
Company ID: CY = Cypress
Document Number: 001-05809 Rev. *Q
Page 37 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Package Diagrams
Figure 11. 100-pin TQFP (14 × 20 × 1.4 mm) Package Outline, 51-85050
ș2
ș1
ș
SYMBOL
DIMENSIONS
MIN. NOM. MAX.
A
A1
1.60
0.05
0.15
NOTE:
1. ALL DIMENSIONS ARE IN MILLIMETERS.
2. BODY LENGTH DIMENSION DOES NOT
INCLUDE MOLD PROTRUSION/END FLASH.
A2
1.35 1.40 1.45
D
15.80 16.00 16.20
MOLD PROTRUSION/END FLASH SHALL
D1
13.90 14.00 14.10
E
21.80 22.00 22.20
NOT EXCEED 0.0098 in (0.25 mm) PER SIDE.
BODY LENGTH DIMENSIONS ARE MAX PLASTIC
E1
19.90 20.00 20.10
R1
0.08
0.20
R2
0.08
0.20
ș
0°
7°
ș1
0°
ș2
11°
13°
12°
0.20
c
b
0.22 0.30 0.38
L
0.45 0.60 0.75
L1
L2
L3
e
BODY SIZE INCLUDING MOLD MISMATCH.
3. JEDEC SPECIFICATION NO. REF: MS-026.
1.00 REF
0.25 BSC
0.20
0.65 TYP
51-85050 *G
Document Number: 001-05809 Rev. *Q
Page 38 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Package Diagrams (continued)
Figure 12. 56-pin SSOP (300 Mils) Package Outline, 51-85062
51-85062 *F
Figure 13. 56-pin QFN ((8 × 8 × 1.0 mm) 6.1 × 6.1 E-Pad (Subcon Punch Type)) Package Outline, 51-85144
51-85144 *J
Document Number: 001-05809 Rev. *Q
Page 39 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Package Diagrams (continued)
Figure 14. 56-pin QFN ((8 × 8 × 1.0 mm) 4.5 × 5.2 E-Pad (Sawn)) Package Outline, 001-53450
001-53450 *E
Document Number: 001-05809 Rev. *Q
Page 40 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
General PCB Layout Recommendations for
USB Mass Storage Designs
Quad Flat Package No Leads (QFN) Package
Design Notes
The following recommendations must be followed to ensure
reliable high performance operation:
Electrical contact of the part to the printed circuit board (PCB) is
made by soldering the leads on the bottom surface of the
package to the PCB. Hence, special attention is required to the
heat transfer area below the package to provide a good thermal
bond to the circuit board. A Copper (Cu) fill must be designed
into the PCB as a thermal pad under the package. Heat is
transferred from the AT2LP through the device’s metal paddle on
the bottom side of the package. Heat from here is conducted to
the PCB at the thermal pad. It is then conducted from the thermal
pad to the PCB inner ground plane by a 5 × 5 array of vias. A via
is a plated through-hole in the PCB with a finished diameter of
13 mil. The QFN’s metal die paddle must be soldered to the
PCB’s thermal pad. Solder mask is placed on the board top side
over each via to resist solder flow into the via. The mask on the
top side also minimizes outgassing during the solder reflow
process.
■
Use at least a four-layer, impedance controlled board to
maintain signal quality.
■
Specify specific impedance targets (ask your board vendor
what they can achieve).
■
Maintain uniform trace widths and trace spacing to control
impedance.
■
Minimize reflected signals by avoiding using stubs and vias.
■
Connect the USB connector shell and signal ground as near to
the USB connector as possible.
■
Use bypass or flyback capacitors on VBUS near the connector.
■
Keep DPLUS and DMINUS trace lengths to within 2 mm of
each other in length, with a preferred length of 20 to 30 mm.
■
Maintain a solid ground plane under the DPLUS and DMINUS
traces. Do not allow the plane to be split under these traces.
■
Do not place vias on the DPLUS or DMINUS trace routing for
a more stable design.
■
Isolate the DPLUS and DMINUS traces from all other signal
traces by no less than 10 mm.
Source for recommendations:
■
EZ-USB FX2LP PCB Design Recommendations
www.cypress.com/?docID=4696
■
High-Speed USB Platform Design Guidelines
http://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf
For further information on this package design, refer to the
application note Surface Mount Assembly of AMKOR’s
MicroLeadFrame (MLF) Technology. The application note
provides detailed information on board mounting guidelines,
soldering flow, rework process, and so on.
Figure 15 displays a cross-sectional area underneath the
package. The cross section is of only one via. The solder paste
template needs to be designed to enable at least 50% solder
coverage. The thickness of the solder paste template must be
5 mil. It is recommended that ’No Clean,’ type 3 solder paste is
used to mount the part. Nitrogen purge is recommended during
reflow.
Figure 15. Cross-Section of the Area Under the QFN Package
0.017” dia
Solder Mask
Cu Fill
Cu Fill
PCB Material
Via hole for thermally connecting the
QFN to the circuit board ground plane.
Document Number: 001-05809 Rev. *Q
0.013” dia
PCB Material
This figure only shows the top three layers of the
circuit board: Top Solder, PCB Dielectric, and
the Ground Plane
Page 41 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Figure 16 is a plot of solder mask pattern and Figure 17 displays an X-Ray image of assembly (darker areas indicate solder).
Figure 16. Plot of the Solder Mask (White Area)
Other Design Considerations
Certain design considerations must be followed to ensure proper
operation of the CY7C68300C/CY7C68301C. The following
items must be taken into account when designing a USB device
with the CY7C68300C/CY7C68301C.
Proper Power-Up Sequence
Figure 17. X-Ray Image of the Assembly
Power must be applied to the CY7C68300C/CY7C68301C
before, or at the same time as the ATA/ATAPI device. If power is
supplied to the drive first, the CY7C68300C/CY7C68301C
startup in an undefined state. Designs that use separate power
supplies for the CY7C68300C/CY7C68301C and the ATA/ATAPI
device are not recommended.
IDE Removable Media Devices
The AT2LP does not fully support IDE removable media devices.
Changes in media state are not reported to the operating system
so users are unable to eject or reinsert media properly. This may
result in lost or corrupted data. Note that standard ATAPI optical
drives and ATA CompactFlash-type devices are not part of this
group.
Devices With Small Buffers
The size of the drive’s buffer can greatly affect the overall data
transfer performance. Ensure that drives have large enough
buffers to handle the flow of data to and from it. The exact buffer
size needed depends on a number of variables, but a good rule
of thumb to follow is:
(approx min buffer) = (data rate) * (seek time + rotation time + other)
where ‘other’ may include things such as the time required to
switch heads and power up a laser. Drives with buffers that are
too small to handle the extra data may perform considerably
slower than expected.
Document Number: 001-05809 Rev. *Q
Page 42 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Acronyms
Acronym
Document Conventions
Description
EEPROM
Electrically Erasable Programmable Read-Only
Memory
I/O
Input/Output
LSB
Units of Measure
Symbol
Unit of Measure
°C
degree Celsius
mA
milliampere
Least Significant Bit
MHz
megahertz
MSB
Most Significant Bit
µA
microampere
PCB
Printed Circuit Board
µF
microfarad
QFN
Quad Flat No-leads
µs
microsecond
SSOP
Shrink Small-Outline Package
µW
microwatt
TQFP
Thin Quad Flat Pack
ms
millisecond
USB
Universal Serial Bus
mV
millivolt
mW
milliwatt
ns
nanosecond
ppm
parts per million
Document Number: 001-05809 Rev. *Q
pF
picofarad
V
volt
W
watt
Page 43 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Errata
This section describes the errata for the EZUSB-AT2LP™ CY7C68300C/301C/320C/321C (AT2LP) silicon. Details include errata
trigger conditions, available workaround, and silicon revision applicability. Please contact your local Cypress sales representative if
you have further questions.
Part Numbers Affected
Part Number
Package Type
Operating Range
CY7C68300C
All
Commercial
CY7C68301C
All
Commercial
CY7C68320C
All
Commercial
CY7C68321C
All
Commercial
AT2LP Qualification Status
In production.
AT2LP Errata Summary
1. PIO mode-3 data recovery path does meet spec timings in AT2LP
Description
The ATA/ATAPI-6 standard specifies the data recovery timings for each of the Read (DIOR)/Write (DIOW) data transfer modes such
as PIO mode-0, 1, 2, 3, 4. As per the standard for PIO mode-3 this timing value is 70 ns. In AT2LP the actual value measured is out
of spec limits.
■
Implication
There is no observed effect due to this behavior but only the waveforms were measured to be out of spec limits.
■
Workaround
None
■
Status
If the PIO mode-3 is required to use in the application the user is suggested to move to FX2LP-to-ATA reference design (CY4611B)
kit. The timing error can be fixed in this kit by modifying the GPIF firmware waveforms.
■
Document Number: 001-05809 Rev. *Q
Page 44 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Document History Page
Description Title: CY7C68300C/CY7C68301C/CY7C68320C/CY7C68321C, EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge
Document Number: 001-05809
Rev.
ECN No.
Orig. of
Change
Submission
Date
**
409321
GIR
12/14/2005
New data sheet.
*A
611658
ARI / KKU
12/15/2006
Minor grammatical corrections across the document.
Removed GPIO2_nHS pin and its related information in all instances across
the document.
Updated Pin Diagrams:
Added figure “56-pin SSOP Pinout (CY7C68320C/CY7C68321C)”.
Updated Figure 4 (Corrected part numbers).
Updated Figure 5 (Corrected part numbers).
Updated Pin Descriptions:
Replaced “GPIO2_nHS” with “GPIO2” in “Pin Name” column.
Updated Operating Modes:
Updated Operational Mode Selection Flow:
Updated description.
Updated Figure 9.
Updated Fused Memory Data:
Updated description.
Updated EEPROM Organization:
Updated Table 11.
Updated Ordering Information (Updated part numbers).
Updated to new template.
*B
2717536
DPT
06/11/2009
Updated Ordering Information (Updated part numbers).
Updated Package Diagrams:
spec 51-85144 – Changed revision from *F to *G.
Added spec 001-53450 Rev. **.
*C
2733311
NMMA
07/08/2009
Updated Additional Resources:
Updated link.
Updated Ordering Information:
No change in part numbers.
Updated details in “Package Type” and “GPIO Pins” columns.
Updated Package Diagrams:
Replaced with correct diagram for spec 51-85062 *C.
*D
2755364
VIVG
08/28/2009
Added Automotive Temperature Range related information in all instances
across the document.
Updated Features:
Updated Features (CY7C68320C/CY7C68321C only):
Added “Automotive AEC Grade Option (–40 °C to 85 °C)”.
Added Note “Automotive part information is preliminary.” and referred the
same note in “Automotive AEC Grade Option (–40 °C to 85 °C)”.
Updated Ordering Information (Updated part numbers).
*E
2813871
VIVG /
PYRS
11/25/2009
Updated Features:
Updated Features (CY7C68320C/CY7C68321C only):
Removed Note “Automotive part information is preliminary.” and its reference.
*F
2896245
VRD
03/19/2010
Updated Ordering Information (Updated part numbers).
Updated Package Diagrams:
spec 51-85050 – Changed revision from *B to *C.
spec 51-85062 – Changed revision from *C to *D.
spec 001-53450 – Changed revision from ** to *B.
*G
2956403
NMMA
06/19/2010
Updated Ordering Information (Updated part numbers).
Document Number: 001-05809 Rev. *Q
Description of Change
Page 45 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Document History Page (continued)
Description Title: CY7C68300C/CY7C68301C/CY7C68320C/CY7C68321C, EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge
Document Number: 001-05809
Rev.
ECN No.
Orig. of
Change
Submission
Date
*H
3124965
NMMA
01/03/2011
Updated Pin Diagrams:
Removed figure “56-Pin SSOP Pinout (CY7C68320C/CY7C68321C)”.
Updated Ordering Information:
Updated part numbers.
Added Ordering Code Definitions.
Added Acronyms and Units of Measure.
Updated to new template.
Completing Sunset Review.
*I
3489506
NMMA
01/10/2011
Removed CY7C68321A part related information in all instances across the
document.
Replaced CY4615C with CY4615B in all instances across the document.
Updated Pin Diagrams:
Updated Figure 5 (Updated caption only).
Updated Ordering Information (Updated part numbers).
Updated Package Diagrams:
spec 51-85050 – Changed revision from *C to *D.
spec 51-85062 – Changed revision from *D to *E.
spec 51-85144 – Changed revision from *H to *I.
Completing Sunset Review.
*J
3578709
NMMA
04/11/2012
Updated Pin Descriptions:
Updated description above table.
Updated Ordering Information (Updated part numbers).
*K
3625641
NMMA
05/24/2012
Updated Package Diagrams:
Replaced with correct diagram for spec 51-85050 *D.
*L
3847849
YHB /
NMMA
12/20/2012
Updated Ordering Information (Updated part numbers).
Updated Package Diagrams:
spec 51-85062 – Changed revision from *E to *F.
spec 001-53450 – Changed revision from *B to *C.
*M
3955864
NIKL
04/05/2013
Added Errata.
*N
4072998
NIKL
07/23/2013
Added Errata footnotes in all instances across the document.
Updated Introduction:
Added Note 1 and referred the same note in “PIO mode 3”.
Updated Ordering Information (Included a column “Status” and updated the
status of CY7C68320C-100AXA as NRND).
Updated to new template.
*O
4584934
NIKL
12/02/2014
Updated Package Diagrams:
spec 51-85050 – Changed revision from *D to *E.
spec 001-53450 – Changed revision from *C to *D.
Completing Sunset Review.
*P
6079528
HPPC
02/23/2018
Updated Package Diagrams:
spec 51-85050 – Changed revision from *E to *G.
spec 51-85144 – Changed revision from *I to *J.
Updated to new template.
*Q
6564132
HPPC
05/02/2019
Updated Ordering Information:
Updated part numbers.
Removed Note “The General Purpose inputs can be enabled on ATAPUEN,
PWR500#, and DRVPWRVLD with EEPROM byte 8, bit 7 on
CY7C68320C/CY7C68321C.” and its reference.
Updated Package Diagrams:
spec 001-53450 – Changed revision from *D to *E.
Updated to new template.
Document Number: 001-05809 Rev. *Q
Description of Change
Page 46 of 47
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Sales, Solutions, and Legal Information
Worldwide Sales and Design Support
Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office
closest to you, visit us at Cypress Locations.
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cypress.com/iot
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cypress.com/psoc
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cypress.com/support
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cypress.com/touch
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PSoC 1 | PSoC 3 | PSoC 4 | PSoC 5LP | PSoC 6 MCU
cypress.com/usb
cypress.com/wireless
© Cypress Semiconductor Corporation, 2005–2019. This document is the property of Cypress Semiconductor Corporation and its subsidiaries (“Cypress”). This document, including any software or
firmware included or referenced in this document (“Software”), is owned by Cypress under the intellectual property laws and treaties of the United States and other countries worldwide. Cypress
reserves all rights under such laws and treaties and does not, except as specifically stated in this paragraph, grant any license under its patents, copyrights, trademarks, or other intellectual property
rights. If the Software is not accompanied by a license agreement and you do not otherwise have a written agreement with Cypress governing the use of the Software, then Cypress hereby grants
you a personal, non-exclusive, nontransferable license (without the right to sublicense) (1) under its copyright rights in the Software (a) for Software provided in source code form, to modify and reproduce
the Software solely for use with Cypress hardware products, only internally within your organization, and (b) to distribute the Software in binary code form externally to end users (either directly or
indirectly through resellers and distributors), solely for use on Cypress hardware product units, and (2) under those claims of Cypress’s patents that are infringed by the Software (as provided by
Cypress, unmodified) to make, use, distribute, and import the Software solely for use with Cypress hardware products. Any other use, reproduction, modification, translation, or compilation of the
Software is prohibited.
TO THE EXTENT PERMITTED BY APPLICABLE LAW, CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS DOCUMENT OR ANY SOFTWARE
OR ACCOMPANYING HARDWARE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. No computing
device can be absolutely secure. Therefore, despite security measures implemented in Cypress hardware or software products, Cypress shall have no liability arising out of any security breach, such
as unauthorized access to or use of a Cypress product. CYPRESS DOES NOT REPRESENT, WARRANT, OR GUARANTEE THAT CYPRESS PRODUCTS, OR SYSTEMS CREATED USING
CYPRESS PRODUCTS, WILL BE FREE FROM CORRUPTION, ATTACK, VIRUSES, INTERFERENCE, HACKING, DATA LOSS OR THEFT, OR OTHER SECURITY INTRUSION (collectively, “Security
Breach”). Cypress disclaims any liability relating to any Security Breach, and you shall and hereby do release Cypress from any claim, damage, or other liability arising from any Security Breach. In
addition, the products described in these materials may contain design defects or errors known as errata which may cause the product to deviate from published specifications. To the extent permitted
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responsibility of the user of this document to properly design, program, and test the functionality and safety of any application made of this information and any resulting product. “High-Risk Device”
means any device or system whose failure could cause personal injury, death, or property damage. Examples of High-Risk Devices are weapons, nuclear installations, surgical implants, and other
medical devices. “Critical Component” means any component of a High-Risk Device whose failure to perform can be reasonably expected to cause, directly or indirectly, the failure of the High-Risk
Device, or to affect its safety or effectiveness. Cypress is not liable, in whole or in part, and you shall and hereby do release Cypress from any claim, damage, or other liability arising from any use of
a Cypress product as a Critical Component in a High-Risk Device. You shall indemnify and hold Cypress, its directors, officers, employees, agents, affiliates, distributors, and assigns harmless from
and against all claims, costs, damages, and expenses, arising out of any claim, including claims for product liability, personal injury or death, or property damage arising from any use of a Cypress
product as a Critical Component in a High-Risk Device. Cypress products are not intended or authorized for use as a Critical Component in any High-Risk Device except to the limited extent that (i)
Cypress’s published data sheet for the product explicitly states Cypress has qualified the product for use in a specific High-Risk Device, or (ii) Cypress has given you advance written authorization to
use the product as a Critical Component in the specific High-Risk Device and you have signed a separate indemnification agreement.
Cypress, the Cypress logo, Spansion, the Spansion logo, and combinations thereof, WICED, PSoC, CapSense, EZ-USB, F-RAM, and Traveo are trademarks or registered trademarks of Cypress in
the United States and other countries. For a more complete list of Cypress trademarks, visit cypress.com. Other names and brands may be claimed as property of their respective owners.
Document Number: 001-05809 Rev. *Q
Revised May 2, 2019
Page 47 of 47
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