User's Manual
AN1469
ZLUSBREF01
USB to SMBus Reference Design
REV.0.00
May 07, 2009
Features
Description
The USB to SMBusTM Interface board allows
communication between a Zilker Labs
Digital-DC™ evaluation board and a PC. This
interface board has been designed to bridge
PMBus commands from a PC application
program to the SMBus. The PMBus command
set is used to configure a Digital-DC device as
well as monitor the power supply. PMBusTM
commands are accessed using the Zilker Labs
interface software from a PC running Microsoft
Windows. Refer to AN13 – PMBus Command
Set for more information on PMBus commands.
The USB to SMBus interface board is used by
connecting the SMBus interface connector
directly to a Zilker Labs evaluation board. The
SMBus connector is found on the lower lefthand side of each evaluation board. Refer to the
Zilker Labs’ product evaluation board quick
start guide and product data sheet for more
information.
•
SMBus control via USB
•
SMBus 2.0 and I2C 2.1 compatible
•
PMBus compliant
•
Self powered from USB
•
Pre-installed firmware
•
Provides SMBus reference rail
Applications
This board has been designed to operate for the
following conditions:
•
Interface to Digital-DC EVBs
•
fSMBus = 100 kHz
•
Temperature range: 0°C to +70°C
Figure 1. USB to SMBus Interface
USB
Conn
USB
to
UART
MCU
UART to
SMBus
SMBus
Conn
Figure 2. Block Diagram
AN1469 Rev.0.00
May 07, 2009
Page 1 of 6
ZLUSBREF01
Schematics
Figure 1. USB to SMBus
AN1469 Rev.0.00
May 07, 2009
Page 2 of 6
ZLUSBREF01
Bill of Materials
Item Quan Reference
C1,C2,C3,C4,C5,C7,
1
11
C8,C9,C10,C11
2
2 C6,C13
3
2 C12,C19
4
2 C14,C15
5
2 C16,C17
6
2 D1,D2
7
1 D3
8
1 D4
9
1 D5
Value
Tol
Rating
Type
PCB Footprint
100n
10%
10V
X7R
SM0603
10u
10n
47p
22p
ESDA6V1-4BC6
BAT54XV2T1OS
LED Green
LED Red
20%
10%
5%
5%
6.3V
25V
50V
50V
6.1V, 80W
200mA
20mA
20mA
10
1
FB1
40 OHM
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
1
1
1
1
3
1
1
2
5
3
1
2
1
4
1
1
1
1
1
1
1
J1
J2
J3
J4
J6
Q1,Q2,Q3
R1
R2
R3,R5
R4,R6,R20,R26
R7,R8,R9
R10
R11,R13
R12
R17,R18,R24,R25
R21
R23
U1
U2
U3
U4
Y1
USB TYPE B
HEADER 5X2
5 PIN
2mm, 5 PIN
2 PIN
FDG6301N
0
470
10k
10k
2.49k
1M
27
1.50k
221
4.75k
2.49k
ATMega32L-8MC
FT232BQ
MIC2920A-3.3WS
93C46-TSSOP
6MHz RESONATOR
8MHz Crystal,
CL = 18pF
T POINT S
NI
AVRISP_10PinConn
10k
100n
33
1
NI
NI
NI
NI
NI
NI =
Y2
TP1,TP2,TP3,TP4
R15,R16
J5
R14
C18
Not Installed
AN1469 Rev.0.00
May 07, 2009
1.5A
CLR
CLR
SM0603
SM0603
SM0603
SM0603
SOT23_6L
SOD-523
SM0805_DIO_1C2A
SM0805_DIO_1C2A
MLF
SM0805
X7R
COG
COG
USB\B
HDRF5DUALRA100X100
SN
HDR5LK100
SN
SIP_5P_2.0MM
SN
SIP2/100
25V DUAL N-CH
SC70-6
THK FILM
SM0805
5% 63mW THK FILM
SM0402
SM0603
1% 100mW THK FILM
1% 63mW THK FILM
SM0402
SM0603
1% 100mW THK FILM
1% 63mW THK FILM
SM0402
5% 63mW THK FILM
SM0402
1% 63mW THK FILM
SM0402
1% 63mW THK FILM
SM0402
0.01 63mW THK FILM
SM0402
0.01 63mW THK FILM
SM0402
MCU
MLF44_7X7_DP
TQFP32/.8P/9X9
400mA
SOT223_1234_REV1
TSSOP8/.65P/6.4
1.8 - 5.5V 93C46
0.01
COMM
CERALOCK
30ppm
63mW
10V
Part Number
C0603C104K8RACTU
PANASONIC-ECG
PANASONIC-ECG
TDK
MURATA
ST MICRO
ON SEMI
CHICAGO MINI
CHICAGO MINI
MOLEX
SAMTEC
AMP
Sullins
TYCO
FAIRCHILD SEMI
YAGEO
ROHM
ROHM
YAGEO
ROHM
ROHM
YAGEO
YAGEO
YAGEO
PANASONIC-ECG
PANASONIC-ECG
ATMEL
FTDI
MICREL
ATMEL
MURATA
ECJ-1VB0J106M
ECJ-1VB1E103K
C1608C0G1H470J
GRM1885C1H220JA01D
ESDA6V1-4BC6
BAT54XV2T1OS
CMD17-21VGC
CMD17-21VRC
MI0805K400R-00
MI0805K400R-01
67068-0000
SSQ-105-02-T-D-RA
640456-5
PRPN051PAEN
644456-2
FDG6301N
RC0805JR-070RL
MCRMZPF4700
MCR03EZPFX1002
RC0402FR-0710KL
MCR03EZPFX2491
MCR01MZPF1004
RC0402JR-0727RL
RC0402FR-071K5L
RC0402FR-07221L
ERJ-2RKF4751X
ERJ-2RKF2491X
ATMEGA32L-8MC
FT232BQ
MIC2920A-3.3WS TR
AT93C46-10TI-1.8
CSTCR6M00G53-R0
STEWARD
CSM-7
X575CT
ECS INC
ECS-80-18-5P
THK FILM
X7R
TP_020H
SM0402
HDR10DUAL100X100
SM0402
SM0603
YAGEO
KEMET
RC0402FR-0710KL
C0603C104K8RACTU
1%
1%
0.1
Manufacturer
KEMET
Page 3 of 6
ZLUSBREF01
References
[1]
AN13 – PMBus Command Set, Zilker Labs, Inc., 2007.
[2]
ZL2005 Data Sheet, Zilker Labs, Inc., 2006.
[3]
ZL2105 Data Sheet, Zilker Labs, Inc., 2007.
[4]
ZL2005EV1 Quick Start Guide, Zilker Labs, Inc., 2006.
[5]
ZL2105EV1 Quick Start Guide, Zilker Labs, Inc., 2006.
Ordering Information
Orderable
Part Number
Description
ZLUSBREF01
USB to SMBus Interface
Revision History
Date
Rev. #
3/27/2007
4/26/2007
0.5
1.0
AN1469 Rev.0.00
May 07, 2009
Preliminary Release
Final Release
Page 4 of 6
ZLUSBREF01
NOTES
AN1469 Rev.0.00
May 07, 2009
Page 5 of 6
Notice
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