# PIN PIN name type
*)
function test
1 V
CC
P positive voltage 5V
2 GND P ground, (reference point for interfaces)
3 TxD O transmitter data output of serial port
4 RxD I receiver data input of serial port
5 SDA I/O I
2
C-compatible input/output pin
6 SCL I/O serial clock pin for I
2
C interface
7 - not used
never connect this pin to GND or V
cc
8 D0 I address bit 0 for the TTL/parallel interface
9 D1 I address bit 1 for the TTL/parallel interface
10 strobe I clock pin for parallel interface
*)
notes: • P power supply
• I input
• O output
• I/O input and output simultaneously
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