Table of Contents
Advertisement
Section 8 I/O Ports
8.5.3
Pin Functions
Table 8.12 shows the port 4 pin functions.
Table 8.12 Port 4 Pin Functions
Pin
Pin Functions and Selection Method
P4
/IRQ
The pin function depends on bit IRQ0 in PMR3.
3
0
P4
/TXD
The pin function depends on bit TE in SCR3-2, bit SPC32 in SPCR, and bit
2
32
PCR4
P4
/RXD
The pin function depends on bit RE in SCR3-2 and bit PCR4
1
32
P4
/SCK
The pin function depends on bits CKE1 and CKE0 in SCR3-2, bit COM32 in
0
32
SMR32, and bit PCR4
Rev. 6.00 Aug 04, 2006 page 228 of 680
REJ09B0145-0600
IRQ0
Pin function
in PCR4.
2
SPC32
TE
PCR4
2
Pin function
P4
RE
PCR4
1
Pin function
P4
in PCR4.
0
CKE1
CKE0
COM32
PCR4
0
Pin function
P4
0
0
P4
input pin
3
0
0
0
1
input pin
P4
output pin
2
2
0
0
1
input pin
P4
output pin
1
1
0
0
0
0
1
input pin
P4
output pin
0
1
IRQ
input pin
0
1
1
*
TXD
output pin
32
in PCR4.
1
1
*
RXD
input pin
32
1
1
*
1
*
*
*
*
SCK
SCK
32
32
output pin
input pin
*: Don't care
Advertisement
Table of Contents
