HD6433935 Hitachi, HD6433935 Datasheet - Page 145

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

8.1
The H8/3937 Series and H8/3937R Series are provided with six 8-bit I/O ports, two 4-bit I/O
ports, one 3-bit I/O port, and one 8-bit input-only port. Also provided are one internal 5-bit I/O
port and one internal 1-bit input-only port capable of interfacing to the on-chip FLEX™ decoder.
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*
1
Description
Overview
8-bit I/O port
MOS input pull-up option
5-bit I/O internal port
Port Functions
Section 8 I/O Ports
Pins and
Functions
P1
IRQ
P1
P1
P1
TMOFH, TMOFL
P1
P2
P2
P2
P2
7
4
3
2
0
0
1
2
4
/IRQ
/TMIG
, P1
/TMOW
/SCK
/SI
/SO
, P2
1
to P1
/TMIF, TMIC
1
1
1
3
4
/
1
/ADTRG External interrupt 4 and A/D
5
/IRQ
3
to
Other Functions
External interrupts 3 to 1
Timer event interrupts
TMIF, TMIC
converter external trigger
Timer G input capture input
Timer F output compare
output
Timer A clock output
SCI1 data output (SO
input (SI
(SCK
None
1
)
1
), clock input/output
1
), data
Function
Switching
Registers
PMR1
TCRF,
TMC
PMR1,
AMR
PMR1
PMR1
PMR1
PMR2
133