hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 253

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

8.4.3
Table 8.9 shows the port 4 pin functions.
Table 8.9
Pin
P4
P4
P4
P4
3
2
1
0
/
/TXD
/RXD
/SCK
I R Q
0
32
32
32
Pin Functions
Port 4 Pin Functions
Pin Functions and Selection Method
The pin function depends on bit IRQ0 in PMR2.
The pin function depends on bit TE in SCR3, bit SPC32 in SPCR, and bit PCR4
in PCR4.
The pin function depends on bit RE in SCR3 and bit PCR4
The pin function depends on bit CKE1 and CKE0 in SCR3, bit COM in SMR3,
and bit PCR4
Pin function
Pin function
Pin function
Pin function
SPC32
PCR4
PCR4
PCR4
CKE1
CKE0
IRQ0
COM
RE
TE
2
1
0
0
in PCR4.
P4
P4
P4
0
input pin P4
2
1
0
input pin
input pin
P4
0
0
3
input pin
0
0
0
0
Rev. 7.00 Mar 10, 2005 page 211 of 652
0
0
0
output pin SCK
0
1
P4
P4
2
1
output pin
output pin
1
1
1
32
pin
*
1
output
I R Q
in PCR4.
Section 8 I/O Ports
1
*
REJ09B0042-0700
TXD
0
RXD
input pin
1
32
SCK
32
*: Don’t care
output pin
input pin
1
1
*
1
*
pin
32
1
*
*
*
input
2