ZLUSBREF01 Datasheet, PDF (1/6 Pages) Intersil Corporation – USB to SMBus Reference Design

Description
The USB to SMBus^TM 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. PMBus^TM
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 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.
Features
• 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
• f_SMBus = 100 kHz
• Temperature range: 0°C to +70°C
USB
Conn
Figure 1. USB to SMBus Interface
USB
to
UART
MCU
UART to
SMBus
Figure 2. Block Diagram
SMBus
Conn