ST ST7538Q, Application Note, Page: 41 / 56

AN2744 Board description
41/56
Figure 39. Scheme of the communication board connector
B_ID_PLM_0 B_ID_PLM_0
GND
B_ID_PLM_1 B_ID_PLM_1
GND
VDDF_FORCE
VDD
VDDF
CH2
BU
NEG_CH2
TxD
TOUT
RxD
REG_DATA
CLRT
CD/PD
ZCOUT
RxTx
REG_OK
MCLK
WD
RESET
PG
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50
CN1
CON50A
P10V
PLM_10V
Table 7. 50-pin connector digital signals
Pin n° Signal name Description Generated by
3 MCLK Oscillator output (programmable) ST7538Q
8 RESET Reset Out for microcontroller ST7538Q
11 REGOK Register OK signal ST7538Q
14 NEG_CH2 Secondary channel select (active low) µC
18 CH2 Secondary channel select (active high) µC
35 CD/PD Carrier or preamble detected signal ST7538Q
37 REG/DATA Register or Data access µC
39 RxD Serial Data Out ST7538Q
41 RxTx Reception or Transmission select signal µC
43 ZCOUT Zero-crossing detection output ST7538Q
45 CLR/T Serial Data Clock ST7538Q
46 WD Watchdog counter reset µC
47 TOUT Timeout / Thermal Protection event signal ST7538Q
48 BU Band in Use detection signal ST7538Q
49 TxD Serial Data Input µC
50 PG Power good signal ST7538Q