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 Figure 2. Block Diagram SMBus Conn ZLUSBREF01 Schematics Figure 1. USB to SMBus 2 ZLUSBREF01DSR1_0 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 1 Y2 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 NI NI NI NI NI NI = TP1,TP2,TP3,TP4 R15,R16 J5 R14 C18 Not Installed ZLUSBREF01DSR1_0 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 1% 100mW THK FILM SM0603 1% 63mW THK FILM SM0402 1% 100mW THK FILM SM0603 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 1.8 - 5.5V 93C46 TSSOP8/.65P/6.4 0.01 COMM CERALOCK 30ppm 63mW 10V Part Number KEMET 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 3 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 4 Date Rev. # 3/27/2007 4/26/2007 0.5 1.0 Preliminary Release Final Release ZLUSBREF01DSR1_0 ZLUSBREF01 NOTES ZLUSBREF01DSR1_0 5 ZLUSBREF01 Zilker Labs, Inc. 4301 Westbank Drive Building A-100 Austin, TX 78746 Tel: 512-382-8300 Fax: 512-382-8329 © 2007, Zilker Labs, Inc. All rights reserved. Zilker Labs, Digital-DC and the Zilker Labs Logo are trademarks of Zilker Labs, Inc. All other products or brand names mentioned herein are trademarks of their respective holders. This document contains information on a reference design. Pricing, specifications and availability are subject to change without notice. Please see www.zilkerlabs.com for updated information. This product is not intended for use in connection with any high-risk activity, including without limitation, air travel, life critical medical operations, nuclear facilities or equipment, or the like. The reference designs contained in this document are for reference and example purposes only. THE REFERENCE DESIGNS ARE PROVIDED "AS IS" AND "WITH ALL FAULTS" AND ZILKER LABS DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED. ZILKER LABS SHALL NOT BE LIABLE FOR ANY DAMAGES, WHETHER DIRECT, INDIRECT, CONSEQUENTIAL (INCLUDING LOSS OF PROFITS), OR OTHERWISE, RESULTING FROM THE REFERENCE DESIGNS OR ANY USE THEREOF. Any use of such reference designs is at your own risk and you agree to indemnify Zilker Labs for any damages resulting from such use. 6 ZLUSBREF01DSR1_0