Platform Manager
Development Kit
Run the Platform Manager Demo
Initial board setup:
• Set all DIP switches in SW9 and SW10 to the up/off position.
• Set all DIP switches in SW2 to the on position.
• Set slide potentiometers (pots) R19 and R20 to the down position, toward the
center of the board.
• No jumpers should be installed.
Demo 1 – Test Board Power, LED D1, and All Power Supplies
Demo 1 shows the ability of the Platform Manager to monitor and sequence input power
rails and on-board supplies. There are five supplies connected to five seperate VMON
inputs on the Platform Manager Evaluation Board. The first three supplies, 5V, 3.3V,
and 2.5V, are power rails that the Platform Manager does not enable; it is only monitors
them. The second 2.5V supply is an LDO that the Platform Manager enables and then
monitors, and the 1.2V supply is a DC-DC converter that the Platform Manager enables
and then monitors. There is also control from the Margin/Trim outputs on the Platform
Manager to each of these supplies. The table below shows how the four LEDs in the
display follow the progress of the monitoring, enabling, and sequencing.
• Plug the 5V wall plug supply into the board supply plug.
- The blue LED D1 is on and will remain on while the board is powered.
- LEDs D21-D23 cycle through steps 1-6 as shown in the table below. Failure to
cycle through the steps indicates a power supply error.
Step D24 D23 D22 D21
Function
1
Off
Off
Off
ON
Wait for 5V supply good
2
Off
Off
ON
Off Wait for 3.3V supply good
3
Off
Off
ON
ON
Wait for 2.5V supply good
4
Off
ON
Off
Off Enable 2.5V LDO, wait for 2.5V good
5
Off
ON
Off
ON
Enable 1.2V DC-DC, wait for 1.2V good
6
Off
ON
ON
Off Waiting for Slide Pots R19 and R20 to be raised to the top of the Slide
Demo 2 – Test Slide Pots R19-R20 and LEDs D3-D6, D13-D14, D19-D20 and
D21-D24
Demo 2 tests the position of the slide pots, and displays patterns and information on
the LEDs and LCD display. The slide pots are connected to two VMON inputs of the
Platform Manager and are set to be “good” at about 3V. The demo checks for both pots
to be at good levels, then continues to the next step, which is to exercise various digital
outputs from the Platform Manager. Platform Manager outputs connect to the LEDs, as
shown in the tables below, and also to the LCD. The Closed Loop Trimming function for
the LDO and DC-DC converter is also enabled at this point.
