ViewSonic VTMS2431 - Page 89

8.19. RS232
pin2,pin3 FOR NULL MODEM
RS_232 CABLE
TX 3.3V , RX 3.3V
TX 20V , RX 10V
UART-RX
/POWER_KEY
/SYSTEM_ON
UART-TX
MVP
MRXD
MC1M
MTXD
MC2M
UART-RX
MVM
UART-TX
/SYSTEM_ON
OSD-POWER-KEY/POWER_KEY
MC1P
MC2P
RRXD
OSD-POWER-KEY 5
UART-RX 5
UART-TX 5
+5V_General
VCC3.3V-ST
VCC3.3V-ST
VCC3.3V-ST
VCC3.3V-ST
VCC3.3V-ST
VCC3.3V-ST
CF17
100nF
R485100R
CF16
100nF
D403
4.7P
R486100R
R473
NC
R475 10K
R483
4.7K
Q406
2N3904
1
2 3
CF19
100nF
R478 1K
CF14
100nF
R482
10K
P405
DB9_V
5
9
4
8
3
7
2
6
1
1011
CF18
100nF
R479
4.7K
R481
47K
CF15
100nF
D404
4.7P
I411
ADM3202
15
16 1
2 3
4
5
6
7
8 9
10
11
1213
14
GND
VCC C1P
VP C1M
C2P
C2M
VM
TOUT2
RIN2 ROUT2
TIN2
TIN1
ROUT1RIN1
T1OUT
R484
4.7K
I410 PIC12F675-I/SN
1
2
3 6
7
8
4 5
VDD
GP5/OSC1/CLKIN
GP4/OSC2 GP1
GP0
VSS
GP3//MCLR/VPP GP2/T0CKI
R476
NC
CF13
100nF
R477 10K
R480
100R
R474
100R
+5V_General 5
VCC3.3V-ST 5
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