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| HD6433802H Datasheet, PDF (159/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer | |||
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Bit 0: P43/IRQ0 pin function switch (IRQ0)
This bit selects whether pin P43/IRQ0 is used as P43 or as IRQ0.
Bit 0
IRQ0
0
1
Description
Functions as P43 input pin
Functions as IRQ0 input pin
(initial value)
8.3.3 Pin Functions
Table 8.6 shows the port 4 pin functions.
Table 8.6 Port 4 Pin Functions
Pin
P43/IRQ0
Pin Functions and Selection Method
The pin function depends on bit IRQ0 in PMR2.
IRQ0
0
Pin function
P43 input pin
1
IRQ0 input pin
P42/TXD32
The pin function depends on bit TE in SCR3, bit SPC32 in SPCR, and bit PCR42
in PCR4.
SPC32
0
1
TE
0
1
PCR42
Pin function
0
P42 input pin
1
P42 output pin
*
TXD32 output pin
P41/RXD32
The pin function depends on bit RE in SCR3 and bit PCR41 in PCR4.
RE
0
1
PCR41
Pin function
0
P41 input pin
1
P41 output pin
*
RXD32 input pin
141
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