5
1.2
Internal Block Diagram
Figure 1.1 shows a block diagram of the H8/3637 Series.
V
SS
V
SS
V
CC
V
CC
OSC
2
OSC
1
X
1
X
2
RES
TEST
P9
7
P9
6
P9
5
P9
4
P9
3
P9
2
P9
1
P9
0
P8
7
P8
6
P8
5
P8
4
P8
3
P8
2
P8
1
P8
0
P7
7
P7
6
P7
5
P7
4
P7
3
P7
2
P7
1
P7
0
PA
3
PA
2
PA
1
PA
0
P1
0
/TMOW
P1
1
/TMOFL
P1
2
/TMOFH
P1
3
/TMIG
P1
4
/PWM
P1
5
/
IRQ1
P1
6
/
IRQ2
/TMCIY
P1
7
/
IRQ3
/TMIF
P2
0
/
IRQ4
/
ADTRG
P2
1
/SCK1
P2
2
/SI1
P2
3
/SO1
P2
4
/SCK3
P2
5
/RXD
P2
6
/TXD
P2
7
/
IRQ0
P5
0
/
WKP0
P5
1
/
WKP1
P5
2
/
WKP2
P5
3
/
WKP3
P5
4
/
WKP4
P5
5
/
WKP5
P5
6
/
WKP6
P5
7
/
WKP7
P6
0
P6
1
P6
2
P6
3
P6
4
P6
5
P6
6
P6
7
AV
CC
AV
SS
PB
4
/AN
4
PB
5
/AN
5
PB
6
/AN
6
PB
7
/AN
7
SCI3
PWM
WDT
DTMF
SCI1
PE
3
PE
2
VT
ref
TONED
Data bus (lower)
System clock
pulse generator
Subclock pulse
generator
Address bus
Data bus (upper)
ROM
(40 k/48 k/
60 kbytes)
RAM
(2 kbytes)
Timer A
Timer F
Timer G
Timer Y
A/D converter
Port E
Port A
Port 9
Port 8
Port 7
Port B
Port 6
Port 5
Port 2
Port 1
CPU (8-bit)
Figure 1.1 Block Diagram