HD6433935 Hitachi, HD6433935 Datasheet - Page 163

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

Bit 2: P3
This bit selects whether pin P3
Bit 2
RESO
0
1
Bit 1: P3
This bit selects whether pin P3
Bit 1
UD
0
1
8.4.3
Table 8-9 shows the port 3 pin functions.
Table 8-9
Pin
P3
P3
P3
7
5
4
, P3
/TXD
/RXD
6
, P3
31
31
2
1
/RESO pin function switch (RESO)
/UD pin function switch (UD)
Pin Functions
0
Port 3 Pin Functions
Description
Functions as P3
Functions as RESO output pin
Description
Functions as P3
Functions as UD input pin
Pin Functions and Selection Method
The pin function depends on bit PCR3n in PCR3.
The pin function depends on bit TE in SCR31, bit SPC31 in SPCR, and bit
PCR3
The pin function depends on bit RE in SCR31 and bit PCR3
Pin function
Pin function
5
SPC31
PCR3
PCR3
Pin function
in PCR3.
TE
RE
PCR3
2
1
2
1
5
4
/RESO is used as P3
/UD is used as P3
I/O pin
I/O pin
n
P3
P3
5
4
input pin
input pin
0
0
1
or as UD.
P3
2
or as RESO.
n
0
0
0
input pin
0
P3
P3
4
5
output pin
output pin
1
1
4
P3
TXD
in PCR3.
RXD
n
output pin
31
31
1
output pin
(initial value)
(initial value)
input pin
1
1
*
1
*
(n=7, 6, 0)
151