MAX5954LEVKIT Maxim Integrated, MAX5954LEVKIT Datasheet - Page 8

• Manufacturer Part Number: MAX5954LEVKIT
• Description: Power Management IC Development Tools Evaluation Kit/Evaluation System for the MAX5954L/MAX5954A
• Manufacturer: Maxim Integrated
• Series: MAX5954r

gram status and SMBus communication status with
respect to U2.
The MAX5954L EV kit software configures the
CMAXQUSB interface board’s SMBus communication
speed to 400kHz by default. The speed can be
reduced to 100kHz if required, by selecting the pull-
down menu’s View|2-Wire Speed|100kHz selection.
This may be required if slower SMBus or 2-wire devices
are connected to the bus on the EV kit.
The general-purpose 2-wire interface utility can also be
used to communicate with the MAX7313 and control or
read back signals from the MAX7313 and/or MAX5954L.
Use the View|Interface pulldown menu to access the
utility. The utility configures the SMBus interface para-
meters such as start and stop bits, acknowledgements,
and clock timing. The 2-wire interface screen allows the
user to send general-purpose SMBus commands using
the SMBusWriteByte and SMBusReadByte. The inter-
Figure 2. 2-Wire Interface Window (Provides Direct, Low-Level Access to the MAX5954L with the MAX7313 and SMBus
2-Wire Interface)
8
_______________________________________________________________________________________
MAX5954L Evaluation Kit/Evaluation System
General-Purpose 2-Wire Interface Utility
face utility only accepts and outputs hexadecimal num-
ber format.
The Hunt for active listeners button scans the entire
2-wire address space, reporting each address that is
acknowledged. The SMBusWriteByte transmits the
device address, command, and one byte of data. The
SMBusReadByte transmits the device address, a com-
mand, and then retransmits the device address and
reads 1 byte of data. For information on the differences
between a 2-wire and an SMBus interface, read appli-
cation note “Comparing the I
www.maxim-ic.com
Problem: software reports it cannot find the inter-
face board.
•
•
Is the interface board power LED lit?
Is the USB communications cable connected?
General Troubleshooting
2
C Bus to the SMBus” at