Datasheet

UCD90124A
SLVSAN8 –JANUARY 2012 www.ti.com
Figure 34. Fusion GUI Device Configuration Export Tool
Devices can be programmed off-board using the Fusion GUI tools or a dedicated device programmer. For small
runs, a ZIF socketed board with an I
2
C header can be used with the standard Fusion GUI or manufacturing GUI.
The TI Evaluation Module for UCD90xxx 64-pin Sequencer and System Health Monitor (UCD90SEQEVM64-650)
can be used for this purpose. The Fusion GUI can also create a data flash file that can then be loaded into the
UCD90124A using a dedicated device programmer.
To configure the device over I
2
C or PMBus, the UCD90124A must be powered. The PMBus clock and data pins
must be accessible and must be pulled high to the same V
DD
supply that powers the device, with pullup resistors
between 1 kΩ and 2 kΩ. Care should be taken to not introduce additional bus capacitance (<100 pF). The user
configuration can be written to data flash using a gang programmer via JTAG or I
2
C before the device is installed
in circuit. To use I
2
C, the clock and data lines must be multiplexed or the device addresses must be assigned by
socket. The Fusion GUI tools can be used for socket addressing. Pre-programming can also be done using a
single device test fixture.
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