Grundig M 100-CF Serviceanleitung Seite 24

Schaltpläne und Platinenabbildungen / Circuit Diagrams and Layout of PCBs
IC 404 M 37471 (8-BIT CMOS MICROCOMPUTER)
Clock Clock
input output
X X
IN OUT
19 20
Clock generating
circuit
X X
CIN COUT
8-bit
Accumulator
Arithmatic
A(8)
and
logical
unit
X
COUT
X
CIN
P5(4) P4(4)
1 42 24 23 33 32 31 30
Input port P5 I/O port P4
IC 501 M 34240 (4-BIT CMOS MICROCOMPUTER)
Connection
Wake Reset
of an external
up input input
capacitor
C CE RESET
9 6 7
Flag P (1)
Carry
Carry
4
4 4
4
Timer 1(9)
Register V(4)
Register R(8)
Register W(2)
Timer2(8)
EXF INTE
(1) (1)
10
INT
Interrupt input
3 - 16
Reset input
RESET V V
CC CC
25 22 21
Data bus
(Note 2)
Program Program
RAM
counter counter
PC (8) PC (8)
128
H L
bytes
Index Index
Processor
register register
status
X(8) Y(8)
register
PS(8)
A-D converter
CNTR CNTR INT
1 0 1
INT
0
P3(8)
29 28 27 26 18 10 11 12 13 14 15 16 17
Input port P3 V
REF
Reference
vollage input
Clock Clock
input output
CNV V V X X
SS DD SS IN OUT
20 8 21 5 4
Clock
generating
circuit
Register B(4) Stack register SDP(8)
Carry
CY(1)
Register A(4)
(Accumulator)
4
4
4
Register J(4) Register H(4)
1F(1)
4 SIOF (1) Register L(4)
2F(1)
Serial I/O circuit
Port F(4) Port G(4)
3 2 1 42 38 39 40 41 15 14 13 12
S CLK
OUT
S S / K
O
IN RDY
I/O port F I/O port G
Serial I/O port/
Input port K
(Note 1)
ROM Timer 1 (8)
4096
bytes
Timer 2 (8)
Stack
Timer 3 (8)
pointer
S(8)
Timer 4 (8)
Byte
counter(4)
SI/O(8)
P2(8) P1(8)
2 3 4 5 6 7 8 9
I/O port P2 I/O port P1
Pull-down
Power supply input
V
P
11
Stack register SK (11)
Stack register SK (11)
RAM
128 words X 4 bits
Stack register SK (11)
Stack register SK (11)
Address Data
Data pointer DP
7
Program counter PC
Z(1) X(2) Y(4)
PC (4)
4
2 4
Register D(3) Register E(8)
4
Port K(1) Port S(8)
25 24 23 22 19 18 17 16
I/O port S
M37471M2-XXXSP
M37471M4-XXXSP
M37471M8-XXXSP
M 37471
Instruction
register (8)
Instruction
decoder
Control signal
PWM control
P0(8)
41 40 39 38 37 36 35 34
I/O port P0
3
ROM
2
2044 words X 9 bits
1
0
Address Data
11
9
PC (7)
H L
9
4 7
Control circuit
Control signal
8
Multiplexer
4 4
12 8
Port D(12)
37 36 35 34 33 32 31 30 29 28 27 26
I/O port D ~D Output port D ~D
4 11 0
GRUNDIG Service
M 100-CF
8
3