Pin configuration
Table 1. Pin description
PlN N°
SYMBOL
NOTE
18
T3IN
TTL/CMOS driver input internal pull-up to VCC
19
T4IN
TTL/CMOS driver input internal pull-up to VCC
20
T5OUT RS-232 driver output
21
T5IN
TTL/CMOS driver input internal pull-up to VCC
22
R2OUT TTL/CMOS receiver output
23
R2IN
RS-232 receiver input
24
T4OUT RS-232 driver output
ST207E
4/17