Block Diagram - GE 12R II Series Technical Manual

GE
TRANSPORTATION
SYSTEMS
GLOBAL SIGNALING DIVISION

Block Diagram

+5V
J1
J1-TO RADIO
B+
B+ B+
COM COM
MIC MIC-AUD
REC-AUD REC-AUD
485-A 485-A
485-B 485-B
SPK+ SPKR+
SPK- SPKR-
IO IN1
IN1
IO IN2
IN2
J6-SPKR
1
SPK+
2
N.C.
3
SPK-
J2-HS/PGM
B+
COM COM
Mic
HS-MIC
Term.
HS-AUD HSAUD
HS-PTT HSPTT
HS-HK HSHK
TXD1 232-TXD1
RXD1 232-RXD1
A
MK1
B
Author:
Date:
Title:
RADIO PROCESSOR MODULE
J2
U2
24C64
5V
+5V
REG
SCL SCL
SDA SDA
LM75
COM
T
SCL SCL
SENSOR
M
SDA SDA
P
U3-A IN1L
U3-B IN2L
LT1785
MAX202
OE
485-EN TXD1 T1I
RE A 485-A
RXD1 R1O
485-TX D B 485-B
VB-EN T2I
485-RX R
R2O
U7-A
MX029
A
1
CH 1
REC-ADU U12-A
2
B
3
CH 2
A
1
U12-A
2
CH 3
CK SERCLK
SDA DATA
CS1 LE
COE Communications Engineering Document
Keith Gilbertson
3/08/02
12RII FCC TECHNICAL MANUAL
GND
ROW1
ROW1
ROW1
ROW1
COL1
COL2
EEPROM
COL3
COL4
COL5
COL6
TEMP
COL7
COL8
SWLED+
K + -
LED Current
Limit
DIM
On/Off
T1O 232-TXD1
R1I 232-RXD1
T2O
R2I
HS-AUD
MIC-AUD
+5V
V-
DB7
LCD
DB6 VBIAS
BIAS
DB5
DB4
Rev:
Pag
e:
4 x 8 KEYPAD
S1 S2 S3 S4 S5 S6 S7
S9 S10 S11 S12 S13 S14 S15
S17 S18 S19 S20 S21 S22 S23
S26 S27 S28 S29 S25
Keypad LED Back-light
LCD MODULE
J5
DB7 31-32 14 DB7
DB6 29-30 13 DB6
DB5 27-28 12 DB5
DB4 25-26 11 DB4
23-24 10 DB3
21-22 9 DB2
19-20 8 DB1
17-18 7 DB0
E 15-16 6 E
R/W 13-14 5 R/W
RS 11-12 4 RS
VBIAS 9-10 3 VBIAS
+5V 7-8 2 VDD
COM 5-6 1 VSS
A
B+ 3-4 15
LED
K
BACKLIGHT
K 1-2 16
A
30 33
of
S8
S16
S24