Datasheet

3
AT42QT1040 [DATASHEET]
9524D–AT42–05/2013
1.2 Pin Descriptions
I/O CMOS input and output OD CMOS open drain output P Ground or power
Table 1-1. Pin Listing
Pin Name Type Function Notes If Unused...
1 SNS2 I/O Sense pin To Cs2 Leave open
2 SNSK1 I/O Sense pin and option detect
To Cs1 and option resistor +
key
Connect to option
resistor*
3 SNS1 I/O Sense pin To Cs1 Leave open
4 SNSK0 I/O Sense pin and option detect
To Cs0 and option resistor +
key
Connect to option
resistor*
5 SNS0 I/O Sense pin To Cs0 Leave open
6 N/C
7 N/C
8 Vss P Supply ground
9 Vdd P Power
10 N/C
11 OUT0 OD Out 0
Alternative function: Debug
CLK
Leave open
12 OUT1 OD Out 1
Alternative function: Debug
DATA
Leave open
13 OUT3 OD Out 3 Leave open
14 OUT2 OD Out 2 Leave open
15 SNSK3 I/O Sense pin To Cs3 + key Leave open
16 SNS3 I/O Sense pin To Cs3 Leave open
17 N/C
18 N/C
19 N/C
20 SNSK2 I/O Sense pin To Cs2 + key Leave open
* Option resistor should always be fitted even if channel is unused and Cs capacitor is not fixed.