User`s guide

Digital Brick

M1 System Management Board User’s Guide 25

for EXT_VOL[3]. Identical switch positions are used for common division factors across all three switches. The table

below applies to any switch.

Note: If an external board has voltages greater than 12 V that need to be monitored, use these options to apply the right

range of voltage to the AV pad.

Digital Brick

You can connect a digital brick on the board. The following signals are common to all digital bricks.

VIN_D

This is the input power to the digital brick. Use alligator clips to connect the VIN_D pin to the input supply of the

digital brick. This pin can provide 9-12 V, depending on the input supply used for the System Management Board.

DIG_BRK_OUT

This is the output voltage of the digital brick. This voltage is monitored by the M1AFS1500-FG484 device using the

AV pads.

VSENSE

This pin is an input to the digital brick that senses back the output voltage of the brick

(Figure 2-11).

Figure 2-11. VSENSE

Table 2-19 · Switch Settings

Numerical Switch Position Internal Voltage as Factor of External Voltage Vext

1Vext * 1

2 Vext * 1/2

3 Vext * 1/4

4 Vext * 1/8

DIG_BRK_OU

VSENSE