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dc2023afa

DEMO MANUAL DC2023A

setup proceDure for multi-BoarD arrays

Procedure:

1. Stack the boards side-by-side by plugging JP1 of one

board into JP2 of another DC2023A board.

2. Ensure different slave address settings for each of the

boards. The address of each board is set by the DIP

switch JP3 on the backside of the board. The setting

must be unique for each board in the array.

3. Plug in the +12V VIN power into one of the boards as

shown in Figure 12. Only one +12V power source is

allowed.

4. The USB to I2C/SMBus/PMBus Controller may be

plugged into any board. If no LTM2987s show up in

the GUI, click the hourglass icon to enumerate the I2C

bus and find the addresses of the parts. Go to step 2 to

ensure that each board has a unique DIP switch setting.

5. Since the individual CONTROL lines are connected

across the boards (CTRL is a common signal across

all boards in the array), make sure that all CONTROL

switches are set to the RUN position.

6. Relaunch LTpowerPlay. It will enumerate the entire

board array and build a representative system tree and

read all hardware settings into the GUI.

Attention: Once the GUI has launched, click the

“RAM->NVM”buttoninthetoolbartoensurethattheslave

addressesareretainedafterapowerofforreset.

Otherwise you may lose communication with

the slaves after a power cycle or reset event.

Figure 12. Array of Multiple DC2023A Demo Boards

LTM2987 데이터시트(PDF) 13 Page - Linear Technology