Service manual
Fig. 2-5
2) Pin assignment
Pin
No.
Port I/O
RESET
State
Signal
name
I/O
Notes
PULL
−UP
−DOWN
1R0
1
I/O H-Z SB O DB4 : SEG-B PULL-DOWN
2R0
2
I/O H-Z SC O DB4 : SEG-C PULL-DOWN
3R0
3
I/O H-Z SD O DB4 : SEG-D PULL-DOWN
4R1
0
I/O H-Z SE O DB4 : SEG-E PULL-DOWN
5R1
1
I/O H-Z SF O DB4 : SEG-F PULL-DOWN
6R1
2
I/O H-Z SG O DB4 : SEG-G PULL-DOWN
7R1
3
I/O H-Z O DB7 : 7SEG COM PULL-DOWN
8R2
0
I/O H-Z O DB2 : DOT DP PULL-DOWN
9R2
1
I/O H-Z O DB3 : DOT COM PULL-DOWN
10 R2
2
I/O H-Z DP O DB5 : 7SEG DP PULL-DOWN
11 R2
3
I/O H-Z ID O DB5 : 7SEG ID PULL-DOWN
12 RA
0
IIMODR I MODE RETURN PULL-UP
13 RA
1
IICFSR I
CLEARK, FEED,
SWITCH RETURN
PULL-UP
14 R3
0
I/O H-Z KEX0 O KEY EXCHANGE0
15 R3
1
I/O H-Z KEX1 O KEY EXCHANGE1
16 R3
2
I/O H-Z NU O GND
17 R3
3
I/O H-Z NU O GND
18 R5
0
I/O
I
ST0 O KEY SCAN ST0
19 R5
1
I/O I ST1 O KEY SCAN ST1
20 R5
2
I/O I ST2 O KEY SCAN ST2
21 R5
3
I/O I ST3 O KEY SCAN ST3
22 R6
0
/INT0 I/O I POFF I P-OFF
23 R6
1
/INT1 I/O I STOP I STOP PULL-UP
24 R6
2
/INT2 I/O I DDIG O +5V
25 R6
3
/INT3 I/O I DCS O DOT DISPLAY CONT./CS
26 Vcc VCC +5V
27 R4
0
/SCK I/O I SCK I SCK
28 R4
1
/SI I/O I HTS I HTS
29 R4
2
/S0 I/O I STH O STH
30 R4
3
/PWM I/O I SDISP I +5V
31 R7
0
/BUZZ I/O I BUZZ O BUZZER
32 R7
1/
SCK2 I/O I DSCK O DOT DISP CONT. SCK
33 R7
2
/SI2 I/O I SRES O SYSTEM RESET PULL-DOWN
Pin
No.
Port I/O
RESET
State
Signal
name
I/O
Notes
PULL
−UP
−DOWN
34 R7
3
/S02 I/O O DS0 O DOT DISP CONT. SO
35 R8
0
I/O O SHEN O SHEN
36 R8
1
I/O O KRQ O KEY REQUEST
37 R9
0
II KR0 I KEY RETURN 0
38 R9
1
II KR1 I KEY RETURN 1
39
R9
2
II KR2 I KEY RETURN 2
40 R9
3
II KR3 I KEY RETURN 3
41 RESET I I CKDCR I CKDC IV RESET
42 OSC2 4.19 MHz X’tal
43 OSC1
44 GND GND
45 CL1 32.768 KHz OSC
46 CL2
47 TEST I I VCKDC 5V
48
D0 I/O H-Z G1 O 7 SEG DIG 1 PULL-DOWN
49 D1 I/O H-Z G2 O 7 SEG DIG 2
PULL-DOWN
50 D2 I/O H-Z G3 O 7 SEG DIG 3
PULL-DOWN
51 D3 I/O H-Z G4 I 7 SEG DIG 4
PULL-DOWN
52 D4 I/O H-Z G5 O 7 SEG DIG 5
PULL-DOWN
53 D5 I/O H-Z G6 O 7 SEG DIG 6
PULL-DOWN
54 D6 I/O H-Z G7 O 7 SEG DIG 7
PULL-DOWN
55 D7 I/O H-Z G8 O
7 SEG DIG 8 PULL-DOWN
56 D8 I/O H-Z G9 O 7 SEG DIG 9
PULL-DOWN
57 D9 I/O H-Z G10 O 7 SEG DIG 10
PULL-DOWN
58 D10 I/O H-Z NU O
PULL-DOWN
59
D11 I/O H-Z NU O
60 D12 I/O H-Z NU O
61 D13 I/O H-Z NU O
62 D14 I/O H-Z NU O
63 D15 I/O H-Z NU O
64 R0
0
I/O H-Z SA O DB4 : SEG-A PULL-DOWN
NOTE 3: Pull-up/down in the table indicates that the lines concerned
require external pull-up/down resistance.
IRQ
SHEN
STH
HTS
SCK
POFF
STOP
SRES
CKDCR
HOST
SYSTEM
7SEG-DISPLAY 7DIG DOT-DISPLAY 16DIG
G1~G7
SA~SG
P0,1,4
CKDC 6
P2,3
DIG00
DIG15
SEG00
SEG15
DOT DISP CONT.
M66004FP
SRES,DCS,DSCK,DSO
ST0~3
KEX0,1
DECODER
LS138
DECODER
LS138
KEY BOARD
MAX. 244key
DECODER
LS153
DECODER
LS153
DISPSL
SKRO
Q
BUZZ
BUZZER
CSFR
MODR
KR0~3
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