Features
Description
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SMBus control via USB
SMBus 2.0 and I2C 2.1 compatible
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.
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:
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 left-
hand side of each evaluation board. Refer to the
Zilker Labs’ product evaluation board quick
start guide and product data sheet for more
information.
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Interface to Digital-DC EVBs
SMBus = 100 kHz
Temperature range: 0°C to +70°C
f
Figure 1. USB to SMBus Interface
MCU
USB
USB
Conn
SMBus
Conn
to
UART to
UART
SMBus
Figure 2. Block Diagram