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Section 8 I/O Ports
Port
Description
Port 3
• 8-bit I/O port
• MOS input pull-up
option
• Large-current port
(H8/3847R Group,
H8/38347 Group
and H8/38447
Group)
Port 4
• 1-bit input port
• 3-bit I/O port
Port 5 • 8-bit I/O port
• MOS input pull-up
option
Port 6 • 8-bit I/O port
• MOS input pull-up
option
Port 7 • 8-bit I/O port
Port 8 • 8-bit I/O port
Port 9 • 8-bit I/O port
Port A • 4-bit I/O port
Port B • 8-bit input port
Port C • 4-bit input port
Notes: 1. The RESO function is not implemented in the H8/38347 Group and H8/38447 Group.
2. The EXCL function is only implemented in the H8/38347 Group and H8/38447 Group.
3. The external expansion function for LCD segments is not implemented in the H8/38347
Group and H8/38447 Group.
Rev. 6.00 Aug 04, 2006 page 204 of 680
REJ09B0145-0600
Pins
Other Functions
P3
/AEVL
SCI3-1 data output (TXD
7
P3
/AEVH
input (RXD
6
P3
/TXD
(SCK
5
31
P3
/RXD
event inputs AEVL, AEVH
4
31
P3
/SCK
3
31
/RESO *
Reset output *
1
P3
2
/UD/EXCL *
2
P3
down select input, and 14-bit PWM
1
output, external subclock input *
P3
/PWM
0
P4
/IRQ
External interrupt 0
3
0
P4
/TXD
SCI3-2 data output (TXD
2
32
P4
/RXD
input (RXD
1
32
P4
/SCK
(SCK
0
32
P5
to P5
/
Wakeup input (WKP
7
0
WKP
to WKP
/
segment output (SEG
7
0
SEG
to SEG
8
1
P6
to P6
/
Segment output (SEG
7
0
SEG
to SEG
16
9
P7
to P7
/
Segment output (SEG
7
0
SEG
to SEG
24
17
P8
to P8
/
Segment output (SEG
7
0
SEG
to SEG
32
25
*
3
P9
/SEG
/CL
• Segment output (SEG
7
40
1
*
3
P9
/SEG
/CL
6
39
2
• Latch clock (CL
/DO *
3
P9
/SEG
5
38
(CL
/M *
3
P9
/SEG
alternating signal (M) *
4
37
P9
to P9
/
3
0
expansion of segment
SEG
to SEG
36
33
• Segment output (SEG
PA
to PA
/
Common output (COM
3
0
COM
to COM
4
1
PB
to PB
/
A/D converter analog input
7
0
AN
to AN
7
0
PC
to PC
/
A/D converter analog input
3
0
AN
to AN
11
8
), data
31
), clock input/output
31
), and asynchronous counter
31
1
, timer C count-up/
), data
32
), clock input/output
32
)
32
to WKP
7
to SEG
8
to SEG
16
to SEG
24
to SEG
32
to SEG
40
) *
3
, shift clock
1
) *
3
, display data (DO) *
2
3
for external
to SEG
36
to COM
4
Function
Switching
Registers
PMR3
SCR31
SMR31
PMR2
PMR3
2
PMR3
SCR32
SMR32
),
PMR5
0
)
LPCR
1
)
LPCR
9
)
LPCR
17
)
LPCR
25
)
LPCR
37
3
and
)
33
)
LPCR
1
AMR
AMR
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