10
ASC Breakout Board
Figure 8. Push-Button Circuit
I
2
C Address Selection DIP Switch
The ASC Breakout Board provides an 8-position DIP switch for I
2
C address selection of the ASC device. The switch
combines with a set of on-board resistors (R9 – R15) to connect to the I2C_ADDR pin of the device (shown in
Figure 9, taken from Sheet 2 of the schematic). Each switch corresponds to a different resistor setting and address
selection (see the ASC Datasheet for more details). The ASC device only checks the resistor setting at power-on-
reset, updating the switches while the board is powered will have no effect. Only one switch should be closed at a
time.
Figure 9. I
2
C Address Selection DIP Switch
Reset Configuration Jumper
The ASC on the breakout board can be configured as a Mandatory ASC or Optional ASC. This setting is configured
in the Platform Designer software and described in the System Connections section of the ASC datasheet. The
position of jumper J12 (shown in Figure 10, from Sheet 2 of the schematic) should match the setting in the soft-
ware. This jumper routes the ASC RESETb signal to either the Mandatory Reset signal or to the Optional Reset
signal on the ASC Interface Connector.
Figure 10. Reset Configuration Jumper
LED10
S
W
2
GPIO10
1
4
2
3
ASC I
2
C Address Select
1
3
2
4
5
7
6
0
I2C_ADDR
+3.3
V
S
W
3E
5
12
S
W
3D
4
13
R9
1K
S
W
3F
6
11
S
W
3H
8
9
S
W
3G
7
10
R10
1
8
.0K
R11
14.0K
R12
10.0K
S
W
3A
1
16
R13
7.00K
S
W
3C
3
14
R14
4.40K
S
W
3B
2
15
R15
2.20K
Mandatory ASC Jumper 2 to 3
Optional ASC Jumper 1 to 2
ASC_RESET
MA
N
DATORY_RESET
ASC_RESET
b
J12
HEADER 3
1
2
3
