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
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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.
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CY7C65621/31
EZ-USB HX2LP Lite™
Low Power USB 2.0 Hub Controller Family
EZ-USB HX2LP Lite™ Low Power USB 2.0 Hub Controller Family
Features
■
USB 2.0 hub controller
■
Automotive and Industrial Grade option (–40 °C to 85 °C)
■
Compliant with the USB 2.0 specification
■
USB-IF certified: TID# 30000009
■
Windows Hardware Quality Lab (WHQL) compliant
■
Up to four downstream ports supported
■
Supports bus powered and self powered modes
■
Single transaction translator (TT)
■
Bus power configurations
■
Fit, form, and function compatible with CY7C65640 and
CY7C65640A (TetraHub™)
■
Space saving 56-pin QFN
■
Integrated port status indicator control
■
24 MHz external crystal (integrated phase locked loop (PLL))
■
In-system EEPROM programming
■
Configurable with external SPI EEPROM:
❐ Vendor ID, Product ID, Device ID (VID/PID/DID)
❐ Number of active ports
❐ Number of removable ports
❐ Maximum power setting for high speed and full speed
❐ Hub controller power setting
❐ Power on timer
❐ Overcurrent detection mode
❐ Enabled and disabled overcurrent timer
❐ Overcurrent pin polarity
❐ Indicator pin polarity
❐ Compound device
❐ Enable full speed only
❐ Disable port indicators
❐ Ganged power switching
❐ Self and bus powered compatibility
❐ Fully configurable string descriptors for multiple language
support
Single power supply requirement
❐ Internal regulator for reduced cost
■ Integrated upstream pull-up resistor
■
■
Integrated pull-down resistors for all downstream ports
■
Integrated upstream and downstream termination resistors
Cypress Semiconductor Corporation
Document Number: 001-52934 Rev. *J
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised May 28, 2019
CY7C65621/31
Functional Description
EZ-USB HX2LP Lite™ is Cypress’s next generation family of
high performance, low power USB 2.0 hub controllers. HX2LP
Lite is an ultra low power single chip USB 2.0 hub controller with
integrated upstream and downstream transceivers, a USB Serial
Interface Engine (SIE), USB Hub Control and Repeater logic,
and Transaction Translator (TT) logic. Cypress has also
integrated many external passive components such as pull up
and pull down resistors, reducing the overall bill of materials
required to implement a hub design. The HX2LP portfolio
consists of:
1. CY7C65631: 4-port/single transaction translator
This device option is for ultra low power applications that
require four downstream ports. All four ports share a single
transaction translator. The CY7C65631 is available in a 56
QFN and is also pin-for-pin compatible with the CY7C65640.
2. CY7C65621:
This device option is for a 2-port bus powered application.
Both ports share a single transaction translator. The
CY7C65621 is available in a 56 QFN.
All device options are supported by Cypress’s world-class
reference design kits, which include board schematics, bill of
materials, Gerber files, Orcad files, and thorough design
documentation.
USB Serial Interface Engine
The Serial Interface Engine (SIE) allows the CY7C65621/31 to
communicate with the USB host. The SIE handles the following
USB activity independently of the Hub Control Block.
According to the USB 2.0 specification, the HUB Repeater
provides the following functions:
■
Sets up and tears down connectivity on packet boundaries
■
Ensures orderly entry into and out of the Suspend state,
including proper handling of remote wakeups.
Transaction Translator
The Transaction Translator (TT) basically translates data from
one speed to another. A TT takes high speed split transactions
and translates them to full or low speed transactions when the
hub is operating at high speed (the upstream port is connected
to a high speed host controller) and has a full or low speed
devices attached. The operating speed of a device attached on
a downstream facing port determines whether the Routing Logic
connects a port to the Transaction Translator or Hub Repeater.
If a full or low speed device is connected to the hub operating at
high speed, the data transfer route includes the Transaction
Translator. If a high speed device is connected to this high speed
hub, the route only includes the repeater and no Transaction
Translator because the device and the hub operate at the same
speed. When the hub is operating at full speed (the upstream
port is connected to a full speed host controller), a high speed
peripheral does not operate at its full capability. These devices
only work at full speed. Full and low speed devices connected to
this hub operate at their normal speed.
Applications
Typical applications for the HX2LP Lite device family are:
■
Standalone hubs
■
Bit stuffing/unstuffing
■
Motherboard hubs
■
Checksum generation/checking
■
Monitor hubs
■
TOKEN type identification
■
Advanced port replicators
■
Address checking.
■
Docking stations
Hub Repeater
■
Split-PC designs
The Hub Repeater manages connectivity between upstream and
downstream facing ports that are operating at the same speed.
It supports full speed, low speed, and high speed connectivity.
■
External personal storage drives
■
Keyboard hubs
Document Number: 001-52934 Rev. *J
Page 2 of 27
CY7C65621/31
Block Diagram – CY7C65631
D+
D-
USB 2.0 PHY
24 MHz
Crystal
High-Speed
USB Control Logic
Serial
Interface
Engine
PLL
SPI_SCK
SPI_SD
SPI_CS
SPI Communication
Block
USB Upstream Port
Transaction Translator
Hub Repeater
TT RAM
Routing Logic
USB Downstream Port 1
USB 2.0
PHY
D+
D-
Port Power
Control
USB Downstream Port 2
Port
Status
Port Power
Control
USB 2.0
PHY
PWR#[1]
LED D+
OVR#[1]
D- PWR#[2]
Port
Status
OVR#[2]
LED
USB Downstream Port 4
USB Downstream Port 3
USB 2.0
PHY
D+
D-
Port Power
Control
Port
Status
USB 2.0
PHY
PWR#[3]
LED D+
OVR#[3]
D-
Port Power
Control
Port
Status
PWR#[4]
LED
OVR#[4]
Block Diagram – CY7C65621
D+
D-
USB 2.0 PHY
24 MHz
Crystal
High-Speed
USB Control Logic
Serial
Interface
Engine
PLL
SPI Communication
Block
USB Upstream Port
SPI_SCK
SPI_SD
SPI_CS
Transaction Translator (X1)
Hub Repeater
TT RAM
Routing Logic
USB Downstream Port 1
USB 2.0
PHY
D+
Document Number: 001-52934 Rev. *J
Port Power
Control
D- PWR#[1]
Port
Status
OVR#[1]
LED
USB Downstream Port 2
USB 2.0
PHY
D+
D-
Port Power
Control
Port
Status
PWR#[2]
LED
OVR#[2]
Page 3 of 27
CY7C65621/31
Contents
Functional Overview ........................................................ 5
System Initialization ..................................................... 5
Enumeration ................................................................ 5
Downstream Ports ....................................................... 5
Upstream Port ............................................................. 5
Power Switching .......................................................... 5
Overcurrent Detection ................................................. 6
Port Indicators ............................................................. 6
Pin Configuration ............................................................. 7
Pin Description ................................................................. 8
Default Descriptors ........................................................ 10
Device Descriptor ...................................................... 10
Configuration Descriptor ............................................ 10
Interface Descriptor ................................................... 11
Endpoint Descriptor ................................................... 11
Device Qualifier Descriptor ........................................ 11
Hub Descriptor .......................................................... 12
Configuration Options ................................................... 13
0xD0 Load ................................................................. 13
0xD2 Load ................................................................. 13
0xD4 Load ................................................................. 14
Supported USB Requests .............................................. 17
Device Class Commands .......................................... 17
Hub Class Commands .............................................. 18
Document Number: 001-52934 Rev. *J
Upstream USB Connection ............................................ 20
Downstream USB Connections ..................................... 20
LED Connections ............................................................ 20
System Block Diagram ................................................... 21
Absolute Maximum Ratings .......................................... 22
Operating Conditions ..................................................... 22
Electrical Characteristics ............................................... 22
DC Electrical Characteristics ..................................... 22
USB Transceiver ....................................................... 22
AC Electrical Characteristics ..................................... 22
Ordering Information ...................................................... 23
Ordering Code Definitions ......................................... 23
Package Diagram ............................................................ 24
Acronyms ........................................................................ 25
Document Conventions ................................................. 25
Units of Measure ....................................................... 25
Document History Page ................................................. 26
Sales, Solutions, and Legal Information ...................... 27
Worldwide Sales and Design Support ....................... 27
Products .................................................................... 27
PSoC® Solutions ...................................................... 27
Cypress Developer Community ................................. 27
Technical Support ..................................................... 27
Page 4 of 27
CY7C65621/31
Functional Overview
The Cypress CY7C65621/31 USB 2.0 hubs are high
performance, low system cost solutions for USB. The
CY7C65621/31 USB 2.0 hubs integrate 1.5 k upstream pull up
resistors for full speed operation and all downstream 15 k pull
down resistors and series termination resistors on all upstream
and downstream D+ and D– pins. This results in optimization of
system costs by providing built-in support for the USB 2.0
specification.
System Initialization
On power up, the CY7C65621/31 reads an external SPI
EEPROM for configuration information. At the most basic level,
this EEPROM has the Vendor ID (VID), Product ID (PID), and
Device ID (DID) for the customer’s application. For more
specialized applications, other configuration options can be
specified. See Configuration Options on page 13 for more
details.
After reading the EEPROM, if VBUSPOWER (connected to
up-stream VBUS) is high, CY7C65621/31 enables the pull up
resistor on D+ to indicate its presence to the upstream hub, after
which a USB Bus Reset is expected. During this reset,
CY7C65621/31 initiates a chirp to indicate that it is a high speed
peripheral. In a USB 2.0 system, the upstream hub responds with
a chirp sequence, and CY7C65621/31 is in a high speed mode,
with the upstream D+ pull up resistor turned off. In USB 1.x
systems, no such chirp sequence from the upstream hub is seen,
and CY7C65621/31 operates as a normal 1.x hub (operating at
full speed).
Enumeration
After a USB Bus Reset, CY7C65621/31 is in an unaddressed,
unconfigured state (configuration value set to ‘0’). During the
enumeration process, the host sets the hub's address and
configuration.
When the hub is configured, the full hub functionality is available.
Downstream Ports
The CY7C65621/31 supports a maximum of four downstream
ports, each of which may be marked as usable or removable in
the extended configuration (0xD2 EEPROM load or 0xD4
EEPROM load, see Configuration Options on page 13.
Downstream D+ and D– pull down resistors are incorporated in
CY7C65621/31 for each port. Before the hubs are configured,
the ports are driven SE0 (Single Ended Zero, where both D+ and
D– are driven low) and are set to the unpowered state. When the
hub is configured, the ports are not driven, and the host may
power the ports by sending a SetPortPower command for each
port. After a port is powered, any connect or disconnect event is
detected by the hub. Any change in the port state is reported by
Document Number: 001-52934 Rev. *J
the hubs back to the host through the Status Change Endpoint
(endpoint 1). Upon receipt of SetPortReset request for a port with
a device connected, the hub does as follows:
■
Performs a USB reset on the corresponding port
■
Puts the port in an enabled state
■
Enables the green port indicator for that port (if not previously
overridden by the host)
■
Enables babble detection when the port is enabled.
Babble consists of a non idle condition on the port after EOF2. If
babble is detected on an enabled port, that port is disabled. A
ClearPortEnable request from the host also disables the
specified port.
Downstream ports can be individually suspended by the host
with the SetPortSuspend request. If the hub is not suspended, a
remote wakeup event on that port is reflected to the host through
a port change indication in the Hub Status Change Endpoint. If
the hub is suspended, a remote wakeup event on this port is
forwarded to the host. The host may resume the port by sending
a ClearPortSuspend command.
Upstream Port
The upstream port includes the transmitter and the receiver state
machine. The transmitter and receiver operate in high speed and
full speed depending on the current hub configuration.
The transmitter state machine monitors the upstream facing port
while the Hub Repeater has connectivity in the upstream
direction. This machine prevents babble and disconnect events
on the downstream facing ports of this hub from propagating and
causing the hub to be disabled or disconnected by the hub to
which it is attached.
Power Switching
The CY7C65621/31 includes interface signals for external port
power switches. Both ganged and individual (per-port)
configurations are supported, with individual switching being the
default. Initially all ports are unpowered. After enumerating, the
host may power each port by sending a SetPortPower request
for that port. The power switching and over-current detection of
downstream ports is managed by control pins connected to an
external power
switch device. PWR [n]# output pins of the CY7C65621/31 series
are connected to the respective external power switch's port
power enable signals. Note that each port power output pin of
the external power switch must be bypassed with an electrolytic
or tantalum capacitor as required by the USB specification.
These capacitors supply the inrush currents, which occur during
downstream device hot-attach events. The polarity of this pin can
be configured through the EEPROM; see 0xD4 Load on page 14.
Page 5 of 27
CY7C65621/31
Overcurrent Detection
Overcurrent detection includes 8 ms of timed filtering by default.
This parameter is configured from the external EEPROM in a
range of 0 ms to 15 ms for both enabled ports and disabled ports
individually. Detection of overcurrent on downstream ports is
managed by control pins connected to an external power switch
device.
The OVR[n]# pins of the CY7C65621/31 series are connected to
the respective external power switch’s port overcurrent
indication (output) signals. After detecting an overcurrent
condition, hub reports overcurrent condition to the host and
disables the PWR# output to the external power device. The
polarity of the OVR pins can be configured through the
EEPROM; see 0xD4 Load on page 14.
Port Indicators
The USB 2.0 port indicators are also supported directly by
CY7C65621/31. According to the specification, each
downstream port of the hub optionally supports a status
indicator. The presence of indicators for downstream facing ports
is specified by bit 7 of the wHubCharacteristics field of the hub
class descriptor. The default CY7C65621/31 descriptor specifies
that port indicators are supported (wHubCharacteristics, bit 7 is
set). If port indicators are not included in the hub, disable this bit
through EEPROM settings.
Each port indicator pin is strategically located directly on the
opposite edge of the port with which it is associated. A port
indicator provides two colors: green and amber. This is usually
implemented as two separate LEDs, one amber and the other
green. A combination of hardware and software control is used
to inform the user of the current status of the port or the device
attached to the port and to guide the user through problem
resolution. Colors and blinking provide information to the user.
The significance of the color of the LED depends on the
operational mode of CY7C65621/31. The CY7C65621/31 port
indicators has two modes of operation: automatic and manual.
On power up the CY7C65621/31 defaults to automatic mode,
where the color of the Port Indicator (green, amber, off) indicates
the functional status of the CY7C65621/31 port. In automatic
mode, the CY7C65621/31 turns on the green LED whenever the
port is enabled and the amber LED when an overcurrent
condition is detected. The color of the port indicator is set by the
port state machine. Blinking of the LEDs is not supported in
automatic mode. Table 1 identifies the mapping of color to port
state in automatic mode.
Table 1. Automatic Port State to Port Indicator Color Mapping [1]
Downstream Facing Hub Port State
Powered Off
Off or Amber, if due to an
Overcurrent Condition
Disconnected, Disabled, Not
Configured, Resetting,
Testing
Off
The LED control lines can also be modulated with a square wave
for power conservation. The polarity of these pins is
programmable, see 0xD4 Load on page 14.
In manual mode, the indicators are under the control of the host,
which can turn on the LEDs, or leave them off. This is done by a
USB hub class request. Blinking of the LEDs is supported in
manual mode. The port indicators allow the user to intervene in
any error detection. For example, when babble is detected while
plugging in a defective device, or when an overcurrent condition
occurs, the port indicators corresponding to the downstream port
blink green or only light the amber LED, respectively.
Table 2 displays the color definition of the indicators when
CY7C65621/31 is in manual mode.[1]
Enabled, Transmit, or
TransmitR
Green
Suspended, Resuming,
SendEOR, Restart_E/S
Off
Table 2. Port Indicator Color Definitions in Manual Mode [2]
Color Definition
Off
Port State
Not Operational
Amber
Error Condition
Green
Fully Operational
Blinking Off/Green
Software Attention
Blinking Off/Amber
Hardware Attention
Blinking Green/Amber
Reserved
Notes
1. Information presented in Table 1 is from USB 2.0 Specification Tables 11-6.
2. Information presented in Table 2 is from USB 2.0 Specification 11-7.
Document Number: 001-52934 Rev. *J
Page 6 of 27
CY7C65621/31
Pin Configuration
DD–[4]/NC
DD+[4]/NC
VCC
54
51
50
49
48
47
46
45
44
GREEN#[4]/NC
AMBER#[4]/NC
SELFPWR
RESET
GND
SPI_SCK
SPI_SD
52
GND
53
OVR#[4]/Rsvd
PWR#[4]/NC
PWR#[3]/NC
55
OVR#[3]/Rsvd
56
VCC
GND
Figure 1. 56-pin Quad Flat Pack No Leads (8 mm × 8 mm) pinout [3]
43
1
42 AMBER#[3]/NC
2
41 GREEN#[3]/NC
3
40
GND 4
GND
39 VCC
DD–[3]/NC
5
38 AMBER#[2]
DD+[3]/NC
6
37 GREEN#[2]
VCC
7
36 AMBER#[1]
GND
8
35 GREEN#[1]
DD–[2]
9
34 GND
DD+[2] 10
33 VCC
VCC 11
32 OVR#[2]
GND 12
31 PWR#[2]
DD–[1] 13
30 OVR#[1]
DD+[1] 14
21
22
23
24
25
GND
XIN
XOUT
VCC
GND
SPI_CS
26
27
28
GND
20
VCC
19
VBUSPOWER
18
VCC
17
D–
16
GND
VCC
15
D+
29 PWR#[1]
Note
3. NC and Rsvd are for CY7C65621 only.
Document Number: 001-52934 Rev. *J
Page 7 of 27
CY7C65621/31
Pin Description
Table 3. Pin Assignments [4]
CY7C65621
Name
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
XIN
XOUT
RESET#
Type
Default
Description
3
7
11
15
19
23
27
33
39
55
4
8
12
16
20
24
28
34
40
47
50
56
21
22
46
CY7C65631
Name
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
XIN
XOUT
RESET#
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Input
Output
Input
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
45
SELFPWR
SELFPWR
Input
N/A
Input
N/A
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
VCC. This signal provides power to the chip.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
GND. Connect to ground with as short a path as possible.
24 MHz Crystal IN or external Clock Input.
24 MHz Crystal OUT. (NC if external clock is used)
Active LOW Reset. This pin resets the entire chip. It is normally
tied to VCC through a 100K resistor, and to GND through a
0.1 µF capacitor. Other than this, no other special power up
procedure is required.
Self Power. Indicator for bus or self powered. 0 is bus powered,
1 is self powered.
VBUS. Connect to the VBUS pin of the upstream connector.
This signal indicates to the hub that it is in a connected state,
and may enable the D+ pull up resistor to indicate a connection.
(The hub does so after the external EEPROM is read).
SPI_CS
SPI_SCK
SPI_SD
Output
Output
I/O/Z
O
O
Z
SPI Chip Select. Connect to CS pin of the EEPROM.
SPI Clock. Connect to EEPROM SCK pin.
SPI Dataline Connect to GND with 15 kresistor and to the
Data I/O pin of the EEPROM.
D–
D+
I/O/Z
I/O/Z
Z
Z
Upstream D– Signal.
Upstream D+ Signal.
Pin
26
VBUSPOWE VBUSPOWE
R
R
SPI Interface
25
SPI_CS
48
SPI_SCK
49
SPI_SD
Upstream Port
17
D–
18
D+
Note
4. Unused port DD+/DD– lines can be left floating. Leave the port power, amber, and green LED pins unconnected, and deassert the overcurrent pin. Do not leave
the overcurrent pin floating; it is an input.
Document Number: 001-52934 Rev. *J
Page 8 of 27
CY7C65621/31
Table 3. Pin Assignments [4] (continued)
CY7C65631
Name
Downstream Port 1
13
DD–[1]
14
DD+[1]
36
AMBER#[1]
Pin
CY7C65621
Name
Type
Default
Description
DD–[1]
DD+[1]
AMBER#[1]
I/O/Z
I/O/Z
Output
Z
Z
1
Downstream D– Signal.
Downstream D+ Signal.
LED. Driver output for amber LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
LED. Driver output for green LED. Port indicator Support.
Default is Active LOW. Polarity is controlled through EEPROM.
Overcurrent Condition Detection Input. Default is active
LOW. Polarity is controlled through EEPROM.
Power Switch Driver Output. Default is active LOW. Polarity
is controlled through EEPROM.
35
GREEN#[1]
GREEN#[1]
Output
1
30
OVR#[1]
OVR#[1]
Input
1
29
PWR#[1]
PWR#[1]
O/Z
Z
DD–[2]
DD+[2]
AMBER#[2]
I/O/Z
I/O/Z
Output
Z
Z
1
Downstream Port 2
9
DD–[2]
10
DD+[2]
38
AMBER#[2]
37
GREEN#[2]
GREEN#[2]
Output
1
32
OVR#[2]
OVR#[2]
Input
1
31
PWR#[2]
PWR#[2]
O/Z
Z
NC
NC
NC
I/O/Z
I/O/Z
Output
Z
Z
1
Downstream Port 3
5
DD–[3]
6
DD+[3]
42
AMBER#[3]
41
GREEN#[3]
NC
Output
1
53
OVR#[3]
Reserved
Input
1
54
PWR#[3]
NC
O/Z
Z
NC
NC
NC
I/O/Z
I/O/Z
Output
Z
Z
1
Downstream Port 4
1
DD–[4]
2
DD+[4]
44
AMBER#[4]
43
GREEN#[4]
NC
Output
1
51
OVR#[4]
Reserved
Input
1
52
PWR#[4]
NC
O/Z
Z
Document Number: 001-52934 Rev. *J
Downstream D– Signal.
Downstream D+ Signal.
LED. Driver output for amber LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
LED. Driver output for green LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
Overcurrent Condition Detection Input. Default is active
LOW. Polarity is controlled through EEPROM.
Power Switch Driver Output. Default is active LOW. Polarity
is controlled through EEPROM.
Downstream D– Signal.
Downstream D+ Signal.
LED. Driver output for amber LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
LED. Driver output for green LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
Overcurrent Condition Detection Input. Default is Active
LOW. Polarity is controlled through EEPROM.
Reserved. Pull to deasserted state with external resistor on the
CY7C65621/31.
Power Switch Driver Output. Default is active LOW. Polarity
is controlled through EEPROM.
Downstream D– Signal.
Downstream D+ Signal.
LED. Driver output for amber LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
LED. Driver output for green LED. Port indicator support.
Default is active LOW. Polarity is controlled through EEPROM.
Overcurrent Condition Detection Input. Default is Active
LOW. Polarity is controlled through EEPROM.
Reserved. Pull to deasserted state with external resistor on the
CY7C65621/31
Power Switch Driver Output. Default is active LOW. Polarity
is controlled through EEPROM.
Page 9 of 27
CY7C65621/31
Default Descriptors
This section presents the different descriptors that are available. There is a table for each that lists the functionality of each descriptor.
Device Descriptor
The standard device descriptor for CY7C65621/31 is based on the information found in the SPI EEPROM. The information in the
EEPROM overrides the default descriptor values. If no EEPROM is used, the CY7C65621/31 enumerates with the default descriptor
values as shown in the table. If a blank EEPROM is connected, the hub enumerates as vendor defined class instead of a hub class.
This is for the purpose of programming the EEPROM with the Cypress driver.
Byte
Full Speed
High Speed
0
0x12
0x12
bLength
Field Name
18 Bytes
Description
bDescriptorType
Device_Descriptor
bcdUSB
USB Specification 2.0 (1.1 if forced FS)
1
0x01
0x01
2,3
0x0110
0x0200
4
0x09
0x09
bDeviceClass
Hub
5
0x00
0x00
bDeviceSubClass
None
6
0x00
0x01
bDeviceProtocol
None
7
0x40
0x40
bMaxPacketSize0
64 Bytes
8,9
0x04B4
0x04B4
wIdVendor
VID (overridden by what is defined in EEPROM)
10,11
0x6560
0x6560
wIdProduct
PID (overridden by what is defined in EEPROM)
12, 13
0x0915
0x0915
wbcdDevice
DID (overridden by what is defined in EEPROM)
14
0x00
0x00
iManufacturer
Overridden by EEPROM
15
0x00
0x00
iProduct
Overridden by EEPROM
16
0x00
0x00
iSerialNumber
Overridden by EEPROM
17
0x01
0x01
bNumConfigurations
One Configuration Supported
Configuration Descriptor
Byte
0
1
Full Speed
High Speed
0x09
0x09
Field Name
bLength
0x02 [5]/0x07 [6] 0x02 [5]/0x07 [6] bDescriptorType
Description
9 bytes
Config_Descriptor
2
0x0019
0x0019
wTotalLength
Length of all other descriptors
4
0x01
0x01
bNumInterfaces
1
5
0x01
0x01
bConfigurationValue
The configuration to use
6
0x00
0x00
iConfiguration
7
0xA0
0xE0
0xA0
0xE0
bmAttributes
8
0x28
0x57[5]
bMaxPower
Value depends on pin 45 - SELFPWR signal
SELFPWR = 0 yields 0xA0 and =1 yields 0xE0
Notes
5. Configured speed descriptor.
6. Other speed descriptor.
Document Number: 001-52934 Rev. *J
Page 10 of 27
CY7C65621/31
Interface Descriptor
Byte
Full Speed
High Speed
Field Name
0
0x09
0x09
bLength
9 bytes
1
0x04
0x04
bDescriptorType
Interface_Descriptor
2
0x00
0x00
bInterfaceNumber
3
0x00
0x00
bAlternateSetting
4
0x01
0x01
bNumEndpoints
5
0x09
0x09
bInterfaceClass
6
0x00
0x00
bInterfaceSubClass
7
0x00
0x00
bInterfaceProtocol
8
0x00
0x00
iInterface
Description
Endpoint Descriptor
Byte
Full Speed
High Speed
Field Name
Description
0
0x07
0x07
bLength
7 Bytes
1
0x05
0x05
bDescriptorType
Endpoint_Descriptor
2
0x81
0x81
bEndpointAddress
IN endpoint #1
3
0x03
0x03
bmAttributes
Interrupt
4,5
0x0001
0x0001
6
0xFF
0x0C
wMaxPacketSize
Maximum packet size
bInterval
Polling rate
Device Qualifier Descriptor
Byte
Full Speed
High Speed
0
0x0A
0x0A
Field Name
10 Bytes
bDescriptorType
Device_Qualifier
1
0x06
0x06
2,3
0x0200
0x0200
4
0x09
0x09
bDeviceClass
5
0x00
0x00
bDeviceSubClass
6
0x01
0x00
bDeviceProtocol
7
0x40
0x40
bMaxPacketSize0
8
0x01
0x01
bNumConfigurations
9
0x00
0x00
bReserved
Document Number: 001-52934 Rev. *J
Description
bLength
bcdUSB
Page 11 of 27
CY7C65621/31
Hub Descriptor
Byte
0
1
2
All Speed
0x09
0x29
0x04 [7]
0x02
0x0089 [7]
Field Name
bLength
bDescriptorType
bNbrPorts
bPwrOn2PwrGood
bHubContrCurrent
7
0x32 [7]
0x28 [7]
0xAE [7]
0x00 [7]
8
0xFF [7]
bPortPwrCtrlMask
3, 4
5
6
wHubCharacteristics
bDeviceRemovable
Description
9 bytes
Hub descriptor
Number of ports supported, CY7C65631.
Number of ports supported, CY7C65621.
b1, b0: Logical power switching mode
00: Ganged power switching (all ports’ power at once)
01: Individual port power switching (Default in CY7C65621/31)
b2: Identifies a compound device,
0: Hub is not part of a compound device (Default in CY7C65621/31),
1: Hub is part of a compound device.
b4, b3: Overcurrent protection mode
00: Global overcurrent protection. The hub reports overcurrent as a summation
of all ports’ current draw, without a breakdown of individual port overcurrent
status.
01: Individual port overcurrent protection. The hub reports overcurrent on a
per-port basis. Each port has an over-current status (Default in
CY7C65621/31).
1X: No overcurrent protection. This option is allowed only for bus powered hubs
that do not implement overcurrent protection.
b6, b5: TT Think Time
00: TT requires at most eight FS bit times of inter transaction gap on a full or
low speed downstream bus (Default in CY7C65621/31).
b7: Port indicators supported,
0: Port indicators are not supported on its downstream facing ports and the
SetPortIndicator request has no effect.
1: Port indicators are supported on its downstream facing ports and the
SetPortIndicator request controls the indicators. See Functional Overview and
Supported USB Requests. (Default in CY7C65621/31).
b15,. b8: Reserved
Time from when the port is powered to when the power is good on that port
Maximum current requirement for the Hub Controller at full speed.
Maximum current requirement for the Hub Controller at high speed.
Indicates if the logical port has a removable device attached (0 = removable,
1 = non-removable)
Required for compatibility with software written for 1.0 compliant devices
Note
7. This value is configured through the external EEPROM.
Document Number: 001-52934 Rev. *J
Page 12 of 27
CY7C65621/31
Configuration Options
Byte 0: 0xD2
Systems using CY7C65621/31 may have the option of using a
fuse ROM which is preset at the factory to configure the hub.
Otherwise, it must have an external EEPROM for the device to
have a unique VID, PID, and DID. The CY7C65621/31 can
communicate with SPI EEPROM that are either double byte
addressed or single byte with the 9th bit within the instruction
byte, such as the 24LC040 parts use. The 25LC080 EEPROM
uses the double byte address format, and therefore the
CY7C656xx can communicate with these parts. The '010s and
'020s use the same command format as is used to interface with
the ‘040. Therefore, these can also be used to interface with the
CY7C65621/31.
If the attached EEPROM is blank (0xFF), the hub enumerates as
a vendor class device. In this configuration, the hub connects to
the Cypress driver to allow programming of the EEPROM. When
the EEPROM is programmed a power cycle configures the chip
as a hub class device.
Needs to be programmed with 0xD2
Byte 1: VID (LSB)
Least Significant Byte of Vendor ID
Byte 2: VID (MSB)
Most Significant Byte of Vendor ID
Byte 3: PID (LSB)
Least Significant Byte of Product ID
Byte 4: PID (MSB)]
Most Significant Byte of Product ID
Byte 5: Reserved
Reserved
Byte 6: DID (MSB)]
Most Significant Byte of Device ID
Byte 7: EnabledOvercurrentTimer[3:0],
DisabledOvercurrentTimer[3:0]
0xD0 Load
With this EEPROM format, only a unique VID, PID, and DID must
be present in the external SPI EEPROM. The contents of the
EEPROM must contain this information in the following format:
Byte
Value
0
0xD0
1
VID (LSB)
2
VID (MSB)
3
PID (LSB)
4
PID (MSB)
5
reserved
6
DID (MSB)
0xD2 Load
Byte
Value (MSB->LSB)
0
0xD2
1
VID (LSB)
2
VID (MSB)
3
PID (LSB)
4
PID (MSB)
5
reserved
6
DID (MSB)
7
EnabledOverCurrentTimer[3:0],
DisableOvercurrentTimer[3:0]
8
ActivePorts[3:0], RemovablePorts[3:0]
9
MaxPower
10
HubControllerPower
11
PowerOnTimer
12
IllegalHubDescriptor, CompoundDevice,
FullspeedOnly, NoPortIndicators, Reserved,
GangPowered, Reserved, Reserved
Document Number: 001-52934 Rev. *J
Count time in ms for filtering overcurrent detection. Bits 7–4
are for an enabled port, and bits 3–0 are for a disabled port.
Both range from 0 ms to 15 ms. See section Port Indicators
on page 6. Default: 8 ms = 0x88.
Byte 8: ActivePorts[3:0], RemovablePorts[3:0]
Bits 7–4 are the ActivePorts[3:0] bits that indicates if the
corresponding port is usable. For example, a two-port hub
that uses ports 1 and 4 sets this field to 0x09. The total
number of ports reported in the Hub Descriptor: bNbrPorts
field is calculated from this. Bits 3–0 are the
RemovablePorts[3:0] bits that indicates whether the
corresponding logical port is removable (set to high). Logical
port numbers are from 1 to n where n is the total number of
active ports. If port 2 is disabled then physical ports 1, 3, and
4 map to logical ports 1, 2, and 3. These bit values are
reported
appropriately
in
the
HubDescriptor:DeviceRemovable field. Default: 0xFF.
Byte 9: MaximumPower
This
value
is
reported
in
the
ConfigurationDescriptor:bMaxPower field and is the current
in 2 mA increments that is required from the upstream hub.
Default: 0x28 = 80 mA for full speed and 0x57 = 174 mA for
high speed.
Byte 10: HubControllerPower
This
value
is
reported
in
the
HubDescriptor:bHubContrCurrent field and is the current in
milliamperes
required
by
the
hub
controller.
Default: 0x50 = 80 mA for full speed and 0xAE = 174 mA for
high speed.
Byte 11: PowerOnTimer
This
value
is
reported
in
the
HubDescriptor:
bPwrOn2PwrGood field and is the time in 2 ms intervals from
the SetPortPower command until the power on the
corresponding
downstream
port
is
good.
Default: 0x32 = 100 ms.
Page 13 of 27
CY7C65621/31
Byte 12: IllegalHubDescriptor, CompoundDevice, Full
speedOnly, NoPortIndicators, Reserved, GangPowered,
SingleTTOnly
Bit 7: IllegalHubDescriptor. For GetHubDescriptor request,
some USB hosts use a DescriptorTypeof 0x00 instead of
HUB_DESCRIPTOR, 0x29. According to the USB 2.0
standard, a hub must treat this as a Request Error, and STALL
the transaction accordingly (USB 2.0, 11.24.2.5). For systems
that do not accept this, the IllegalHubDescriptor configuration
bit may be set to allow CY7C65621/31 to accept a
DescriptorType of 0x00 for this command. Default is 1.
Bit 6: CompoundDevice. Indicates whether the hub is part of
a compound device. This is reported in the HubDescriptor,
wHub-Characteristics: b2. Default set to ‘0’.
Bit 5: Fullspeed. Only configures the hub to be a full speed
only device. Default is set to ‘0’.
Bit 4: NoPortIndicators. Turns off the port indicators and does
not report them as present in the HubDescriptor, wHubCharacteristics b7 field. Default is set to ‘0’.
Bit 3: Reserved. Set this bit to ‘0’.
Bit 2: GangPowered. Indicates whether the port power
switching is ganged (set to 1) or per-port (set to ‘0’). This is
reported in the HubDescriptor, wHubCharacteristics field, b4,
b3, b1, and b0. Default is set to ‘0’.
Bit 1: Reserved. Default is set to ‘0’.
Bit 0: Reserved. Default is set to ‘0’.
0xD4 Load
Byte
Value (MSB->LSB)
0
1
2
3
4
5
6
7
0xD4
VID (LSB)
VID (MSB)
PID (LSB)
PID (MSB)
reserved
DID (MSB)
EnabledOverCurrentTimer[3:0],
DisableOvercurrentTimer[3:0]
MaxPower (Full speed)
MaxPower (High speed)
Reserved
Reserved
HubControllerPower Full Speed Bus
Powered
HubControllerPower High Speed Bus
Powered
HubControllerPower Full Speed Self
Powered
8
9
10
11
12
13
14
Document Number: 001-52934 Rev. *J
Factory
Fusible
X
X
X
X
X
Byte
Factory
Fusible
Value (MSB->LSB)
15
HubControllerPower High Speed Self
Powered
16
PowerOnTimer
17
IllegalHubDescriptor,
CompoundDevice, FullspeedOnly,
NoPortIndicators, Reserved,
GangPowered, SingleTTOnly,
Reserved
18
AmberPolarity, GreenPolarity,
ModulateIndicators,
PowerControlPolarity,
OverCurrentPolarity,
OverCurrentMode1,
OverCurrentMode2
19
Write Protect
20
NumLangs
21
SupportedStrings
22
ActivePorts[3:0]
23
RemovablePorts[3:0]
24
LangID
a = 24 + 2N iManufacturer
b = a + 2N iProduct
c = b + 2N iSerialNumber
d = c + 2N iConfiguration(FS)
e = d + 2N iConfiguration(HS)
f = e + 2N iInterface(0)
g = f + 2N reserved
h = g + 2N Strings
N:NumLangs
X
X
X
Byte 0: 0xD4
Needs to be programmed with 0xD4
Byte 1: VID (LSB)
Least Significant Byte of Vendor ID
Byte 2: VID (MSB)
X
X
Most Significant Byte of Vendor ID
Byte 3: PID (LSB)
Least Significant Byte of Product ID
X
X
Byte 4: PID (MSB)
Most Significant Byte of Product ID
Byte 5: Reserved
Reserved.
Byte 6: DID (MSB)
Most Significant Byte of Device ID
Page 14 of 27
CY7C65621/31
Byte 7: EnabledOvercurrentTimer[3:0],
DisabledOvercurrentTimer[3:0]
Count time in ms for filtering overcurrent detection. Bits 7–4
are for an enabled port, and bits 3–0 are for a disabled port.
Both range from 0 ms to 15 ms. See section Port Indicators
on page 6. Default: 8 ms = 0x88.
Byte 8: MaximumPower (Full Speed)
This
value
is
reported
in
the
ConfigurationDescriptor:bMaxPower field and is the current
in 2 mA increments that is required from the upstream hub
when connected at full speed. Default: 0x28 = 80 mA for full
speed.
Byte 9: MaximumPower (High Speed)
This
value
is
reported
in
the
ConfigurationDescriptor:bMaxPower field and is the current
in 2 mA increments that is required from the upstream hub
when connected at high speed. Default: 0x57 = 174 mA for
high speed.
Byte 10: Reserved
Write zeros to this location.
Byte 11: Reserved
Write zeros to this location.
Byte 12: HubControllerPower (Full Speed, bus powered)
This
value
is
reported
in
the
HubDescriptor:bHubContrCurrent field and is the current in
milliamperes required by the hub controller when connected
on the upstream hub as a full speed. Default: 0x50 = 80 mA
for full speed.
Byte 13: HubControllerPower (High Speed, bus powered)
This
value
is
reported
in
the
HubDescriptor:bHubContrCurrent field and is the current in
milliamperes required by the hub controller when connected
on the upstream hub as a high speed. Default: 0xAE = 174
mA for high speed.
Byte 14: HubControllerPower (Full Speed, self powered)
This
value
is
reported
in
the
HubDescriptor:bHubContrCurrent field and is the current in
milliamperes required by the hub controller when connected
on the upstream hub as a full speed. Default: 0x50 = 80 mA
for full speed.
Byte 15: HubControllerPower (High speed, self powered)
This
value
is
reported
in
the
HubDescriptor:bHubContrCurrent field and is the current in
milliamperes required by the hub controller when connected
on the upstream hub as a high speed. Default: 0x64 = 100 mA
for high speed.
Byte 16: PowerOnTimer
This
value
is
reported
in
the
HubDescriptor:
bPwrOn2PwrGood field and is the time in 2 ms increments
from the SetPortPower command until the power on the
corresponding
downstream
port
is
good.
Default: 0x32 = 100 ms.
Document Number: 001-52934 Rev. *J
Byte 17: IllegalHubDescriptor, CompoundDevice, Full
speedOnly, NoPortIndicators, Reserved, GangPowered,
Reserved
Bit 7: IllegalHubDescriptor. For GetHubDescriptor request,
some USB hosts use a DescriptorTypeof 0x00 instead of
HUB_DESCRIPTOR, 0x29. According to the USB 2.0
standard, a hub must treat this as a Request Error, and STALL
the transaction accordingly (USB 2.0, 11.24.2.5). For systems
that do not accept this, the IllegalHubDescriptor configuration
bit may be set to allow CY7C65621/31 to accept a
DescriptorType of 0x00 for this command. Default set to 1.
Bit 6: CompoundDevice. Indicates whether the hub is part of
a compound device. This is reported in the HubDescriptor,
wHub-Characteristics: b2. Default is set to ‘0’.
Bit 5: Fullspeed. Only configures the hub to be a full speed
only device. Default is set to ‘0’.
Bit 4: NoPortIndicators. Turns off the port indicators and does
not report them as present in the HubDescriptor,
wHubCharacteristics b7 field. Default is set to ‘0’.
Bit 3: Reserved. Set this bit to ‘0’.
Bit 2: GangPowered. Indicates whether the port power
switching is ganged (set to 1) or per-port (set to ‘0’). This is
reported in the HubDescriptor, wHubCharacteristics field, b4,
b3, b1, and b0. Default is set to ‘0’.
Bit 1: Reserved. Default is set to ‘0’.
Bit 0: Reserved. Default is set to ‘0’.
Byte 18: AmberPolarity, GreenPolarity, SelfPowerable,
ModulateIndicators, PowerControlPolarity,
OverCurrentPolarity, OverCurrentMode1,
OverCurrentMode2
Bit 7: AmberPolarity. Indicates the polarity of the amber
indicator control. (1 = high, 0 = low)
Bit 6: GreenPolarity. Indicates the polarity of the green
indicator control. (1 = high, 0 = low)
Bit 5: SelfPowerable. Indicates whether the hub is capable of
operating in self-powered mode. If ‘0’, the hub is capable of
bus-powered operation only.
Bit 4: ModulateIndicators. If this bit is set, the indicator outputs
are modulated by a square wave of 120 Hz, for power
savings. If ‘0’, the outputs are static.
Bit 3: PowerControlPolarity. If set, the power control outputs
are active HIGH. If not set, the power control outputs are
active LOW.
Bit 2: OverCurrentPolarity. If set, the over-current inputs are
active HIGH. If not set, the over-current inputs are active
LOW.
Bit 1: OverCurrentMode1. Reported as bit 4 of the
wHubCharacteristics field of the hub descriptor. If set to ‘1’,
this bit disables over-current detection.
Bit 0: OverCurrentMode2. Reported as bit 3 of the
wHubCharacteristics field of the hub descriptor. If Bit 1 of this
byte is set to ‘0’, over-current detection is enabled. If this bit
(Bit 0) is set to ‘1’, the hub reports over-current on a per-port
basis. If set to ‘0’, the hub reports over-current as the
summation of all ports’ current draw.
Page 15 of 27
CY7C65621/31
Byte 19: Write Protect
Writing the value 0x42 to this field enables Write Protect and
any future writes to the EEPROM will fail. Default is set to ‘0’.
Byte 20: NumLangs
Number of supported string languages. CY7C656xx supports
a maximum of 31 languages; if this field is set to ‘0’ or a
number larger than 31, all string support is disabled.
Byte 21: SupportedStrings
This field contains a bitmap of strings supported by the hub.
A set bit indicates that the standard string is supported. A bit
not set indicates that the string is not supported. The hub
controller returns a non-zero index for each string that is
supported, and returns 0x00 for each string not supported, as
indicated by this field. The bits in this field correspond to the
following standard strings.
Table 4. Byte 21 Supported Strings
Bit
Name
7
Reserved
6
Reserved
5
Interface (0)
The iInterface string index
reported in the first interface
descriptor (alternate setting 0)
4
iConfiguration
(High speed) The iConfiguration
string index reported in the
configuration descriptor, when
operating at high speed
3
2
iConfiguration
Description
number of active ports. If port 2 is disabled then physical ports
1, 3, and 4 map to logical ports 1, 2, and 3. These bit values
are recorded in the HubDescriptor:DeviceRemovable field.
Default 0x0F.
Byte 24: LangID
Array of LangID codes supported by the hub. Each LangID
consists of two bytes, stored LSB first. The array has
NumLangs entries (2 × NumLangs bytes).
Byte a: iManufacturer
Array of addresses for the iManufacturer strings. Each
address is two bytes long, stored LSB first. The array has
NumLangs entries (2 × NumLangs bytes). (The starting
EEPROM address is based upon the number entered for
NumLangs. The address a = 24 + (2 × NumLangs).
Byte b: iProduct
Array of addresses for the iProduct strings. Each address is
two bytes long, stored LSB first. The array has NumLangs
entries (2 × NumLangs bytes).
The address b = a + (2 × NumLangs).
Byte c: iSerialNumber
(Full speed) The iConfiguration
string index reported in the
configuration descriptor, when
operating at full speed
iSerial Number The iSerialNumber string index
reported in the device descriptor
1
iProduct
The iProduct string index
reported in the device descriptor
0
iManufacturer
The iManufacturer string index
reported in the device descriptor
Byte 22: ActivePorts[3:0]
Bits 3–0 are the ActivePorts[3:0] bits that indicates if the
corresponding port is usable. For example, a two-port hub
that uses ports 1 and 4 would set this field to 0x09. The total
number of ports reported in the Hub Descriptor: bNbrPorts
field is calculated from this. Default 0x0F
Byte 23: RemovablePorts[3:0]
Bits 3–0 are the RemovablePorts[3:0] bits that indicates
whether the corresponding logical port is removable (set to
high). Logical port numbers are from 1 to n where n is the total
Document Number: 001-52934 Rev. *J
Array of addresses for the iSerialNumber strings. Each
address is two bytes long, stored LSB first. The array has
NumLangs entries (2 × NumLangs bytes).
The address c = b + (2 × NumLangs).
Byte d: iConfiguration(Full Speed)
Array of addresses for the iConfiguration (full speed) strings.
Each address is two bytes long, stored LSB first. The array
has NumLangs entries (2 × NumLangs bytes).
The address d = c + (2 × NumLangs).
Byte e: iConfiguration(High Speed)
Array of addresses for the iConfiguration (high speed) strings.
Each address is two bytes long, stored LSB first. The array
has NumLangs entries (2 × NumLangs bytes).
The address e = d + (2 × NumLangs).
Byte f: iInterface(0)
Array of addresses for the iInterface(0) strings. Each address
is two bytes long, stored LSB first. The array has NumLangs
entries (2 × NumLangs bytes).
The address f = e + (2 × NumLangs).
Byte g: iInterface(1)
Reserved
Byte h: Strings
Strings addressed by the string pointers. Strings must comply
with the USB specification. The first byte must be the length
of the string in bytes, the second must be 0x03, and the string
must be in Unicode.
Page 16 of 27
CY7C65621/31
Supported USB Requests
Device Class Commands
Table 5. Device Class Requests
Request
bmRequestType bRequest
wValue
wIndex
wLength
Data
GetDeviceStatus
10000000B
0x00
0x0000
0x0000
0x0002
2 Byte Device
Status
GetInterfaceStatus
10000001B
0x00
0x0000
0x0000
0x0002
2 Byte
Interface
Status
GetEndpointStatus
10000010B
0x00
0x0000
0x0000
0x0002
2 Byte
Endpoint
Status
GetDeviceDescriptor
10000000B
0x06
0x0001
Zero or
Language ID
Descriptor Descriptor
Length
GetConfigDescriptor
10000000B
0x06
0x0002
Zero or
Language ID
Descriptor Descriptor
Length
GetDeviceQualifierDescriptor
10000000B
0x06
0x0006
Zero or
Language ID
Descriptor Descriptor
Length
GetOtherSpeedConfigurationDescriptor
10000000B
0x06
0x0007
Zero or
Language ID
Descriptor Descriptor
Length
GetConfiguration [8]
10000000B
0x08
0x0000
0x0000
0x0001
Configuration
Value
SetCongfiguration [8]
00000000B
0x09
Configuration
Value
0x0000
0x0000
None
GetInterface
10000001B
0xA
0x0000
0x0000
0x0001
Interface
Number
SetInterface
00000001B
0x0B
Alternate Setting Interface
Number
0x0000
None
SetAddress
00000000B
0x05
Device Address 0x0000
0x0000
None
SetDeviceRemoteWakeup
00000000B
0x03
0x01
0x0000
0x0000
None
SetDeviceTest_J
00000000B
0x03
0x02
0x0100
0x0000
None
SetDeviceTest_K
00000000B
0x03
0x02
0x0200
0x0000
None
SetDeviceTest_SE0_NAK
00000000B
0x03
0x02
0x0300
0x0000
None
SetDeviceTest_Packet
00000000B
0x03
0x02
0x0400
0x0000
None
SetEndpointHalt
00000000B
0x03
0x00
0x0000
0x0000
None
ClearDeviceRemoteWakeup
00000000B
0x01
0x01
0x0000
0x0000
None
ClearEndpointHalt
00000000B
0x01
0x00
0x0000
0x0000
None
Note
8. Only one configuration is supported in CY7C656xx.
Document Number: 001-52934 Rev. *J
Page 17 of 27
CY7C65621/31
Hub Class Commands
Table 6. Hub Class Requests
Request
bmRequestType bRequest
wValue
wIndex
wLength
Data
GetHubStatus
10100000B
0x00
0x0000
0x0000
0x0004
Hub status (See Table 11-19
of USB 2.0 Specifications)
Change Status (See Table
11-20 of USB 2.0
Specifications)
GetPortStatus
10100011B
0x00
0x0000
Byte 0: 0x00 0x0004
Byte 1: Port
Port status (See Table 11-21
of USB 2.0 Specifications)
Change Status (See Table
11-20 of USB 2.0
Specifications)
ClearHubFeature
00100000B
0x01
Feature Selectors[9] 0 or 0x0000
1
0x0000
None
ClearPortFeature
00100011B
0x01
Feature Selectors[9] 1, Byte 0: 0x00 0x0000
2, 8, 16, 17, 18, 19, or 20 Byte 1: Port
None
ClearPortFeature
00100011B
0x01
0x0000
Feature Selectors[9] 22 Byte 0: (PORT_INDICATOR)
Byte 1: Port
None
SetHubFeature
00100000B
0x03
Feature Selector[9] 0 or 0x0000
1
0x0000
SetPortFeature
00100011B
0x03
Feature Selectors[9] 2, 4 Port
or 8
0x0000
None
SetPortFeature
00100011B
0x03
Feature Selector[9] 21
(PORT_TEST)
0x0000
Byte 0:
Selectors[9]
1,2, 3, 4 or 5
Byte 1: Port
None
SetPortFeature
00100011B
0x03
Feature Selector[9] 22
(PORT_INDICATOR)
Byte 0:
0x0000
Selectors[10]
0, 1, 2, or 3
Byte 1: Port
None
GetHubDescriptor
10100000B
0x06
Descriptor Type and
Descriptor Index
Hub
Descriptor
Length
ClearTTBuffer
00100011B
0x08
Dev_Addr, EP_Num
TT_Port
0x0000
None
ResetTT
00100000B
0x09
0x0000
Byte 0: 0x00 0x0000
Byte 1: Port
None
GetTTState
10100011B
0X0A
TT_Flags
Byte 0: 0x00 TT State
Byte 1: Port Length
TT State
StopTT
00100011B
0x0B
0x0000
Byte 0: 0x00 0x0000
Byte 1: Port
None
Notes
9. Feature selector values for different features are presented in Table 7 on page 19.
10. Selector values for different features are presented in Table 9 on page 20.
Document Number: 001-52934 Rev. *J
Page 18 of 27
CY7C65621/31
Table 6. Hub Class Requests (continued)
Request
bmRequestType bRequest
wValue
wIndex
wLength
Data
Vendor Commands
Read EEPROM
11000000B
0x02
0x00
0x00
Length
Data
This request results in length bytes of data being read from the external memory device, and returned to the host. Data is read
beginning with address 0. This request fails if there is no external memory device present. This request is only valid if the hub is in
the Configured state; the request fails otherwise.
Write EEPROM
01000000B
0x01
0x00
0x00
Length
Data
This request results in length bytes of data being written to the external memory device. Data is written beginning with address 0.
This request fails if there is no external memory device present. This request is only valid if the hub is in the Configured state or if
the external memory device write protect byte is set; the request fails otherwise.
Table 7. Hub Class Feature Selector
Feature Selector
Recipient
Value
C_HUB_LOCAL_POWER
Hub
0
C_HUB_OVER_CURRENT
Hub
1
PORT_CONNECTION
Port
0
PORT_ENABLE
Port
1
PORT_SUSPEND
Port
2
PORT_RESET
Port
4
PORT_POWER
Port
8
PORT_LOW_SPEED
Port
9
C_PORT_CONNECTION
Port
16
C_PORT_ENABLE
Port
17
C_PORT_SUSPEND
Port
18
C_PORT_OVER_CURRENT
Port
19
C_PORT_RESET
Port
20
PORT_TEST
Port
21
PORT_INDICATOR
Port
22
Table 8. Test Mode Selector for Feature Selector
PORT_TEST (0x21)[11]
PORT_TEST Mode Description
Selector Value
Test_J
1
Test_K
2
Test_SE0_NAK
3
Test_Packet
4
Test_Force_Enable
5
Note
11. Selector values for different features are presented in Table 8 on page 19.
Document Number: 001-52934 Rev. *J
Page 19 of 27
CY7C65621/31
Table 9. Port Indicator Selector for Feature Selector PORT_INDICATOR (0x22)
Port Indicator Color
Selector Value
Port Indicator Mode
Color set automatically as shown in Table 1 on page 6
0
Automatic mode
Amber
1
Manual mode
Green
2
Manual mode
Off
3
Manual mode
Upstream USB Connection
The following is a schematic of the USB upstream connector.
Figure 2. USB Upstream Port Connection
BUSPOWER
VCC
D–
D–
2.2 F
10 V
D+
D+
100 k
GND
SHELL
Downstream USB Connections
The following is a schematic of the USB downstream connector.
Figure 3. USB Downstream Port Connection
VCC
PWRx
150 µF
10 V
0.01 µF DD–[X]
D–
DD+[X]
D+
GND
SHELL
LED Connections
The following is a schematic of the LED circuitry.
Figure 4. USB Downstream Port Connection
GREEN#[x]
AMBER#[x]
Document Number: 001-52934 Rev. *J
680
3.3 V
680
Page 20 of 27
CY7C65621/31
System Block Diagram
Figure 5. Sample Schematic for 4-Port Self Powered Configuration
5V
VBUSPOWER
VBUS
VCC
D– 2.2 F
D–
D+
D+
10 V
DsPWR1
PWR1
15 k
DsPWR4
OVR1
Power
PWR2 Management
150 k
OVR2
PWR3
GND
SPI_SCK
SPI_CS
DsPWR1
GREEN#[1]
680
DI
SPI_SD
DsPWR2
150 F
10 V
CS
DD–[2]
DD+[2]
0.01F
GREEN#[2]
12 pF
12 pF
SELFPWR
VBUSPOWER
3.3 V
100K
RESET
0.1F
D-
D+
D+
DD–[1]
DD-[1]
DD+[1]
DD+[1]
DD–[2]
DD-[2]
DD+[2]
DD+[2]
DD-[3]
DD+[3]
DD–[4]
DD-[4]
DD+[4]
DD+[4]
GREEN[1]
AMBER[1]
GREEN[1]
AMBER[1]
GREEN[2]
AMBER[2]
GREEN[2]
AMBER[2]
GREEN[3]
AMBER[3]
GREEN[3]
AMBER[3]
GREEN[4]
AMBER[4]
PWR1
OVR1
PWR2
OVR2
PWR3
OVR3
PWR4
OVR4
SPI_CS
SPI_SCK
SPI_SD
GND1
GND2
GND3
GND4
GND5
GND6
GND7
GND8
GND9
GND10
GND11
GND12
DD–[3]
DD+[3]
HX2LP Lite
Document Number: 001-52934 Rev. *J
3.3 V
680
DsPWR3
VBUSPOWER
D–
680
XOUT
XIN
VCC1
VCC2
VCC3
VCC4
VCC5
VCC6
VCC7
VCC8
VCC9
VCC10
AMBER#[2]
10K
VCC
D–
D+
GND
SHELL
24 MHz
3.3 V
3.3 V
680
DO
CLK
SPI
EEPROM
3.3 V
VCC
D–
D+
GND
SHELL
AMBER#[1]
SPI_SD
DD–[1]
DD+[1]
0.01F
DsPWR2
OVR3
PWR4
OVR4
SHELL
DsPWR3
150 F
10 V
GREEN[4]
AMBER[4]
PWR1
OVR1
PWR2
OVR2
PWR3
OVR3
PWR4
OVR4
SPI_CS
150 F
10 V
DD-[3]
DD+[3]
0.01F
VCC
D–
D+
GND
SHELL
GREEN#[3]
AMBER#[3]
680
680
DsPWR4
150 F
10 V
3.3 V
DD-[4]
DD+[4]
0.01F
VCC
D–
D+
GND
SHELL
SPI_SCK
SPI_SD
GREEN#[4]
AMBER#[4]
680
3.3 V
680
Page 21 of 27
CY7C65621/31
Absolute Maximum Ratings
Operating Conditions
Storage temperature ................................ –65 °C to +150 °C
TA (Ambient temperature under bias):
Commercial ................................................... 0 °C to +70 °C
Industrial ..................................................... –40 °C to 85 °C
Automotive .................................................. –40 °C to 85 °C
Ambient temperature with power applied:
Commercial ................................................... 0 °C to +70 °C
Industrial ..................................................... –40 °C to 85 °C
Automotive .................................................. –40 °C to 85 °C
Supply voltage .........................................+3.15 V to +3.45 V
Supply voltage to ground potential ..............–0.5 V to +4.0 V
Ground voltage ................................................................ 0 V
DC voltage applied to outputs
in high Z State ..................................... –0.5 V to VCC + 0.5 V
Oscillator or Crystal Frequency (FOSC),
parallel resonant,
12-pF load capacitance, 0.5 mW ................ 24 MHz ± 0.05%
Power dissipation (4 HS ports) .................................... 0.9 W
Static discharge voltage .......................................... > 2000 V
Maximum output sink current per I/O ......................... 10 mA
Electrical Characteristics
DC Electrical Characteristics
Parameter
VCC
Description
Conditions
Supply voltage
VCC RampUp Ramp rate on VCC
Min
Typ
Max
Unit
3.15
3.3
3.45
V
–
–
18
V/ms
VIH
Input high voltage
2
–
5.25
V
VIL
Input low voltage
–0.5
–
0.8
V
Il
Input leakage current
0 < VIN < VCC
–
–
±10
A
VOH
Output voltage high
IOUT = 4 mA
2.4
–
VOL
Output low voltage
IOUT = –4 mA
–
–
0.4
V
IOH
Output current high
–
–
4
mA
IOL
Output current low
–
–
4
mA
CIN
Input pin capacitance
–
–
10
pF
ISUSP
Suspend current
–
80
–
A
Full speed host, full speed devices
–
86
110
mA
High speed host, high speed devices
–
231
260
mA
ICC
V
Supply Current
4 Active Ports
2 Active Ports
No Active Ports
High speed host, full speed devices
–
154
180
mA
Full speed host, full speed devices
–
77
100
mA
High speed host, high speed devices
–
163
190
mA
High speed host, Full speed devices
–
136
160
mA
Full speed host
–
65
90
mA
High speed host
–
93
120
mA
USB Transceiver
USB 2.0 certified in full, low, and high speed modes.
AC Electrical Characteristics
Both the upstream USB transceiver and all four downstream transceivers have passed the USB-IF USB 2.0 Electrical Certification
Testing.
Document Number: 001-52934 Rev. *J
Page 22 of 27
CY7C65621/31
Table 10. Serial Peripheral Interface
Parameter
Description
Conditions
Clock rise/fall time
Min
Typ
Max
Unit
–
–
500
ns
Clock frequency
–
–
250
kHz
Data setup time
50
–
–
ns
Hold time
100
–
–
ns
Reset period
1.9
–
–
ms
Ordering Information
Ordering Code
Package Type
CY7C65621-56LTXC
56-pin QFN 2-Port
CY7C65621-56LTXI
CY7C65621-56LTXCT
56-pin QFN 2-Port – Tape and Reel
CY7C65621-56LTXIT
CY7C65631-56LTXC
56-pin QFN 4-Port
CY7C65631-56LTXI
CY7C65631-56LTXCT
56-pin QFN 4-Port – Tape and Reel
CY7C65631-56LTXIT
CY4606
CY7C65631 USB 2.0 4-Port hub reference design kit
CY4605
CY7C65621 USB 2.0 2-Port hub reference design kit
Ordering Code Definitions
CY 7
C
65 XXX - 56LT X
X
X
X = blank or T
blank = Tube; T = Tape and Reel
Temperature Range: X = C or I or A
C = Commercial; I = Industrial; A = Automotive
Pb-free
Package Type:
56LT = 56-pin QFN (Sawn Type)
XXX = 621 or 631
621 = Two port hub; 631= Four port hub
Family Code:
65 = USB Hubs
Technology Code: C = CMOS
Marketing Code: 7 = Cypress products
Company ID: CY = Cypress
Document Number: 001-52934 Rev. *J
Page 23 of 27
CY7C65621/31
Package Diagram
The CY7C65621/31 is available in a space saving 56-pin QFN (8 × 8 mm).
Figure 6. 56-pin QFN ((8 × 8 × 1.0 mm) 6.1 × 6.1 E-Pad (Sawn)) Package Outline, 51-85187
51-85187 *G
Document Number: 001-52934 Rev. *J
Page 24 of 27
CY7C65621/31
Acronyms
Document Conventions
Table 11. Acronyms Used in this Document
Units of Measure
Acronym
EEPROM
Description
electrically erasable programmable read-only
memory
Table 12. Units of Measure
Symbol
Unit of Measure
°C
degree Celsius
I/O
input/output
kHz
kilohertz
LED
light-emitting diode
k
kilohm
LSB
least-significant bit
MHz
megahertz
MSB
most-significant bit
µA
microampere
PLL
phase locked loop
µF
microfarad
SIE
serial interface engine
mA
milliampere
SPI
serial peripheral interface
mm
millimeter
ROM
read-only memory
ms
millisecond
QFN
quad-flat no-leads
mW
milliwatt
TT
transaction translator
ns
nanosecond
USB
universal serial bus
USB-IF
universal serial bus implementor’s forum
Document Number: 001-52934 Rev. *J
ohm
%
percent
pF
picofarad
V
volt
W
watt
Page 25 of 27
CY7C65621/31
Document History Page
Document Title: CY7C65621/31, EZ-USB HX2LP Lite™ Low Power USB 2.0 Hub Controller Family
Document Number: 001-52934
Rev.
ECN
Orig. of
Change
Submission
Date
**
2683316
OGC /
PYRS
04/15/2009
New data sheet.
*A
2937054
STVC
05/25/2010
Updated table formats across the document.
Updated Pin Description:
Updated Table 3:
Updated details in “Description” column corresponding to Pin 51 and Pin 53.
Updated Ordering Information:
No change in part numbers.
Rearranged parts in alphabetical order.
Updated Package Diagram:
spec 51-85187 – Changed revision from *C to *E.
Removed spec 51-85144 *G.
Updated to new template.
*B
2953993
DSG
06/16/2010
Updated Ordering Information:
Updated part numbers.
*C
3180356
ODC
02/23/2011
Removed Automotive Temperature Range related information in all instances
across the document.
Updated Ordering Information:
No change in part numbers.
Added Ordering Code Definitions.
Added Acronyms and Units of Measure.
Updated to new template.
Completing Sunset Review.
Description of Change
*D
3404912
AASI
10/13/2011
Added watermark “Not Recommended for New Designs” across the document.
*E
3453432
ASHC
12/07/2011
Removed watermark “Not Recommended for New Designs” across the
document.
Updated Package Diagram:
spec 51-85187 – Changed revision from *E to *F.
Updated to new template.
*F
3846590
PDAV
12/19/2012
Updated Features (Added Industrial Grade and Automotive Grade
information).
Updated Absolute Maximum Ratings (Added Industrial Grade and Automotive
Grade information).
Updated Operating Conditions (Added Industrial Grade and Automotive Grade
information).
Updated Ordering Information (Updated part numbers).
*G
4799279
GINS
06/16/2015
Updated Package Diagram:
spec 51-85187 – Changed revision from *F to *G.
Updated to new template.
Completing Sunset Review.
*H
5316710
HBM
06/21/2016
Updated System Block Diagram:
Updated Figure 5.
Completing Sunset Review.
*I
5751250
HARA
05/26/2017
Updated Cypress Logo and Copyright.
*J
6582773
MARF
05/28/2019
Updated to new template.
Completing Sunset Review.
Document Number: 001-52934 Rev. *J
Page 26 of 27
CY7C65621/31
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.
PSoC® Solutions
Products
Arm® Cortex® Microcontrollers
Automotive
cypress.com/arm
cypress.com/automotive
Clocks & Buffers
Interface
cypress.com/clocks
cypress.com/interface
Internet of Things
Memory
cypress.com/iot
cypress.com/memory
Microcontrollers
cypress.com/mcu
PSoC
cypress.com/psoc
Power Management ICs
Touch Sensing
USB Controllers
Wireless Connectivity
PSoC 1 | PSoC 3 | PSoC 4 | PSoC 5LP | PSoC 6 MCU
Cypress Developer Community
Community | Projects | Video | Blogs | Training | Components
Technical Support
cypress.com/support
cypress.com/pmic
cypress.com/touch
cypress.com/usb
cypress.com/wireless
© Cypress Semiconductor Corporation, 2009–2019. 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
by applicable law, Cypress reserves the right to make changes to this document without further notice. Cypress does not assume any liability arising out of the application or use of any product or
circuit described in this document. Any information provided in this document, including any sample design information or programming code, is provided only for reference purposes. It is the
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: 001-52934 Rev. *J
Revised May 28, 2019
Page 27 of 27
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