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KM 13
IC602 TC74HC237AP
A
SELECT
B
C
G1
ENABLE
G2
INPUTS
GL
µ
IC601
PD753017AGC-E03
INTT1
BASIC
INTERVAL
WATCHDOG
TIMER
INTBT
TIMER/
TI0/P13
EVENT
COUNTER
PTO0/P20
P0
INTT0
TOUT0
WATCH
BUZ/P23
TIMER
INTW
f
LC0
SWSB1/P03
CLOCKED
SERIAL
SO/SB0/P02
INTERFACE
SCK/P01
INTCSI
TOUT0
INT0/P10
INT1/P11
INTERRUPT
INT2/P12
CONTROL
INT4/P00
KR0/P60
8
KR7/P73
BIT SEQ
BUFFER (16)
*1. µPD753012, 753016, 753017
*2. ROM
GRUNDIG Service
TI1/TI2/
PT01/P21
P12/INT2
PT02/P22/PCL
TIMER/EVENT
TIMER/EVENT
COUNTER *1
COUNTER *2
PROGRAM
COUNTER *1
ALU
ROM *2
DECODER
PROGRAM
AND
MEMORY
CONTROL
fx/2
SYSTEM CLOCK
CLOCK
CLOCK
GENERATOR
OUTPUT
DIVIDER
CONTROL
SUB
PCL/PT02/P22
XT1 XT2
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
TOUT0
INTT2
SP (8)
CY
SBS
BANK
GENERAL REG.
RAM
DATA
MEMORY
1024 X 4 BITS
STAND BY
CPU CLOCK
CONTROL
MAIN
X1
X2
IC V
V
DD
Y0
Y1
Y2
Y3
DATA
OUTPUTS
Y4
Y5
Y6
Y7
PORT0
4
P00-P03
PORT1
P10-13
4
PORT2
P20-23
4
PORT3
P30-33
4
PORT4
P40-43
4
PORT5
P50-53
4
PORT6
4
P60-63
4
PORT7
P70-73
S0-S23
24
S24/BP0-
8
S31/BP7
LCD
CONTROLLER
4
COM0-COM3
DRIVER
3
V
LC0
f
BIAS
LCD
LCDCL/P30
SYNC/P31
RESET
SS
-V
LC2
3 - 25
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