HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 179

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.1
The H8/3644 Series is provided with three 8-bit I/O ports, three 5-bit I/O ports, two 3-bit I/O
ports, and one 8-bit input-only port. Table 8.1 indicates the functions of each port.
Each port has of a port control register (PCR) that controls input and output, and a port data
register (PDR) for storing output data. Input or output can be assigned to individual bits.
See 2.9.2, Notes on Bit Manipulation, for information on executing bit-manipulation instructions
to write data in PCR or PDR.
Block diagrams of each port are given in Appendix C I/O Port Block Diagrams.
Table 8.1
Port
Port 1
Port 2
Port 3
Port 5
Description
Overview
5-bit I/O port
Input pull-up MOS
selectable
3-bit I/O port
3-bit I/O port
Input pull-up MOS
selectable
8-bit I/O port
Input pull-up MOS
Port Functions
Pins
P1
P1
IRQ
P1
P1
P2
P2
P2
P3
P3
P3
P5
P5
TMIB
P5
ADTRG
P5
INT
Section 8 I/O Ports
7
6
4
0
2
1
0
2
1
0
7
6
5
4
/IRQ
/PWM
/TMOW
/TxD
/RxD
/SCK
/SO
/SI
/SCK
/INT
4
2
to P1
/INT
/INT
to P5
to INT
to IRQ
1
1
5
3
7
6
/
1
1
/TRGV
5
0
/
/
0
1
Other Functions
External interrupt 3, timer V trigger
input
External interrupts 2 and 1
14-bit PWM output
Timer A clock output
SCI3 data output
SCI3 data input
SCI3 clock input/output
SCI1 data output (SO
(SI
INT interrupt 7
INT interrupt 6
Timer B event input
INT interrupt 5
A/D converter external trigger input
INT interrupts 4 to 0
1
), clock input/output (SCK
1
), data input
1
)
Function
Switching
Register
PMR1
PMR1
PMR1
PMR7
SCR3
SCR3,
SMR
PMR3
171