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Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
BA6890FP
28 27 26 25 24 23 22
-
+
+
-
1
MB7376A
CTL
CXP5086H
(Enables to specify the
I/O with bit unit)
Port A
Port B
Register
Data memory
400 x 4
bits
Stack
Data memory
LCD
VL
controller/driver
VLC1
VLC2
VLC3
SEG16
SEG0
COM0
SEG23
SEG15
COM3
(Common with Port E, Port F)
3 - 7
-
+
+
-
2
3
4
5
6
7
Vcc
3
REFERENCE
2
VOLTAGE
INTERNAL BIAS &
REFERENCE VOLTAGE
1
-IN
+
ERROR
AMP.
-
8
FB
(Enables to specify the
Combines use of mask with
I/O with port unit)
segment output, optional)
Port C
Port D
Port E
Program counter
Alu
(13)
Accumulator
Flag
Program memory
6144 x 8 bits
Timer (8)
CXP5086)
Timer/Counter (8)
4096 x 8 bits
Serial I/O (8)
(CXP5084)
Interrupt control
Instruction control
CXP5084/5086
Time base timer
(18)
Clock control
Port X
Port Y
(Common with serial I/O)
21 20 19 18 17 16 15
THERMAL
SHUTDOWN
8
9
OSC
7
SAW-TOOTH
WAVEFORM
-
P.W.M.
OUTPUT DRIVE
+
COMP
CONTROL
+
6
GND
Port F
PY0
PY1
INT2/PY2
EC/PY3
SC/PX0
SOB/PX1
SOA/PX2
SI/PX3
PD0
PD1
PD2
PD3
PC0
PC1
PC2
PC3
PB0
PB1
PB2
EXTAL
XTAL
BA6892FP
BA6890FB
10 11 12 13 14
5
OUT
4
Is
MB3776A
64 63 62 61 60 59 58 57 56 55 54 53 52
1
51
COM3
2
50
SEG0
3
49
SEG1
4
48
SEG2
5
47
SEG3
6
46
SEG4
7
45
SEG5
8
44
SEG6
9
43
SEG7
CXP5084/5086
10
42
SEG8
11
41
SEG9
12
40
SEG10
13
39
SEG11
14
38
SEG12
15
37
SEG13
16
36
SEG14
17
35
SEG15
18
34
SEG16/PF0
19
33
SEG17/PF1
20 21 22 23 24 25 26 27 28 29 30 31 32
GRUNDIG Service
K-CDP 66
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