4-2
EA-80
IC
1
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
15
16
2
39
40
37
38
35
36
33
34
32
30
31
29
28
27
26
25
24
23
22
21
C-MOS 8 BIT MICRO CONTROLLER
—TOP VIEW—
(RxD) P31
(TxD) P33
(SCLK) P32
P27 (A15)
P26 (A14)
P25 (A13)
P24 (A12)
P23 (A11)
P22 (A10)
P21 (A9)
P20 (A8)
P17 (A7)
P16 (A6)
P15 (A5)
P14 (A4)
P13 (A3)
P12 (A2)
P11 (A1)
P10 (A0)
X2
X1
(
RD
) P35
(
WR
) P36
(TO1/
WAIT
) P37
NMI
EA
CLK
(D0) P00
(D1) P01
(D2) P02
(D3) P03
(D4) P04
(D5) P05
(D6) P06
(D7) P07
V
SS
(GND)
(INT0) P80
(INT1/TI2) P81
RESET
(
RD
) P35
(
WR
) P36
12
(D0) P00
(D1) P01
(D2) P02
(D3) P03
(D4) P04
(D5) P05
(D6) P06
(D7) P07
P27 (A15)
P26 (A14)
P25 (A13)
P24 (A12)
P23 (A11)
P22 (A10)
P21 (A9)
P20 (A8)
P17 (A7)
P16 (A6)
P15 (A5)
P14 (A4)
P13 (A3)
P12 (A2)
P11 (A1)
P10 (A0)
X1
X2
CLK
(INT0) P80
(INT1/TI2) P81
(TO1/
WAIT
) P37
(RXD) P31
(SCLK) P32
(TxD) P33
13
14
15
16
17
18
19
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
21
22
11
4
5
10
23
7
9
8
6
1
2
3
NMI
EA
RESET
V
CC
(
+
5 V)
INPUT/OUTPUT
INPUT
P00 - P07/(D0 - D7)
P10 - P17/(A0 - A7)
P20 - P27/(A8 - A15)
; PROGRAM MEMORY DATA PORT 0
; PROGRAM MEMORY ADDRESS PORT 1
; PROGRAM MEMORY ADDRESS PORT 2
EA
; EXTERNAL ACCESS
NMI
; NON-MASCABLE INTERRUPT
RESET
; RESET
X1
; CRYSTAL OSC 1
P31/R
X
D
; PORT31/SERIAL RECEIVE DATA
P80/INT0
; PORT80/INTERRUPT 0
P81/INT1/TI2
; PORT81/INTERRUPT 1/TIMER 2
OUTPUT
CLK
; CLOCK
P32/SCLK
; PORT32/SERIAL CLOCK
P33/T
X
D
; PORT33/SERIAL TRANSMIT DATA
P35/
RD
; PORT35/READ STROBE
P36/
WR
; PORT36/WRITE STROBE
P37/
WAIT
/TO1
; PORT37/WAIT/TIMER 1
X2
; CRYSTAL OSC 2
TMP90PH02P (TOSHIBA)
INTERRUPT
CONTROLLER
WATCH DOG
TIMER
SERIAL I/O
1CH
RAM
(512 B)
OSC
PORT
0
PROM
(16 KB)
TIMER
8-BIT 2CH
(TIMER 0/1)
TIMER
8-BIT 2CH
(TIMER 2/3)
CPU
A
F
B
C
D
E
H
L
A'
F'
B'
C'
D'
E'
H'
L'
IX
IY
SP
PC
40
9
7
1
2
3
8
6
20
21
22
11
10
23
4
5
12 - 19
24 - 31
32 - 39
VCC
X1
X2
CLK
P00 - P07/
D0 - D7
P10 - P17/
A0 - A7
P20 - P27/
A8 - A15
P35/
RD
P36/
WR
VSS (GND)
RESET
EA
P80/INT0
P31/RXD
P32/SCLK
P33/TXD
NMI
P37/
WAIT
/TO1
P81/INT1/TI2
PORT
1
PORT
2
PORT
3
