Section 8 I/O Ports
Rev. 7.00 Mar 10, 2005 page 194 of 652
REJ09B0042-0700
Port Description Pins Other Functions
Function
Switching
Registers
Port 4 P4
3
/
IRQ
0
External interrupt 0 PMR2
• 1-bit input port
• 3-bit I/O port
P4
2
/TXD
32
P4
1
/RXD
32
P4
0
/SCK
32
SCI3 data output (TXD
32
),
data input (RXD
32
), clock
input/output (SCK
32
)
SCR3
SMR3
SPCR
Port 5
• 8-bit I/O port
• MOS input pull-up
option
P5
7
to P5
0
/
WKP
7
to
WKP
0
/
SEG
8
to SEG
1
Wakeup input (
WKP
7
to
WKP
0
), segment output
(SEG
8
to SEG
1
)
PMR5
LPCR
Port 6
• 8-bit I/O port
• MOS input pull-up
option
P6
7
to P6
0
/
SEG
16
to SEG
9
Segment output (SEG
16
to
SEG
9
)
LPCR
Port 7
• 8-bit I/O port
P7
7
to P7
0
/
SEG
24
to SEG
17
Segment output (SEG
24
to
SEG
17
)
LPCR
Port 8
• 8-bit I/O port
P8
7
to P8
0
/
SEG
32
to SEG
25
Segment output (SEG
32
to
SEG
25
)
LPCR
Port 9 P9
5
to P9
2
(P9
5
, P9
4
, P9
2
,
P9
3
/V
ref
)
*
4
None
(LVD reference voltage
external input pin)
*
4
(LVDSR)
*
4
• Dedicated 6-bit
output port
• High-voltage, large-
current port
*
3 P9
1
, P9
0
/
PWM2, PWM1
10-bit PWM output PMR9
• High-voltage port
*
3
IRQAEC None
Port A
• 4-bit I/O port
PA
3
to PA
0
/
COM
4
to COM
1
Common output
(COM
4
to COM
1
)
LPCR
Port B
• Dedicated 8-bit
input port
PB
7
to PB
4
/
AN
7
to AN
4
A/D converter analog input
(AN
7
to AN
4
)
AMR
PB
3
/AN
3
/
IRQ
1
A/D converter analog input
(AN
3
), external interrupt 1,
timer event input (TMIC)
AMR
PMRB
TMC
PB
2
/AN
2
A/D converter analog input AMR
PB
1
/AN
1
/(extU)
*
4
PB
0
/AN
0
/(extD)
*
4
A/D converter analog input
(LVD detect voltage external
input pin)
*
4
AMR
(LVDCR)
*
4
Notes: 1. Pin 16 and the associated function are not implemented on the H8/38124 Group.
2. Applies to the HD64338024, HD64338023, HD64338022, HD64338021, HD64338020,
and H8/38124 Group only.
3. Standard voltage on H8/38024S Group and H8/38124 Group.
4. Applies to H8/38124 Group only.
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