Datasheet

Section 10 I/O Ports
Rev.7.00 Mar. 18, 2009 page 538 of 1136
REJ09B0109-0700
• PG5/BACK
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
BRLE, and bit PG5DDR.
Operating
mode
1, 2, 4 7
EXPE ⎯ 0 1
BRLE 0 1 ⎯ 0 1
PG5DDR 0 1 ⎯ 0 1 0 1 ⎯
Pin
function
PG5 input PG5
output
BACK
output
PG5
input
PG5
output
PG5 input PG5
output
BACK output
• PG4/BREQO
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
BRLE, bit BREQO, and bit PG4DDR.
Operating
mode
1, 2, 4
7
EXPE ⎯ 0 1
BRLE 0 1 ⎯ 0 1
BREQO ⎯ 0 1 ⎯ ⎯ 0 1
PG4DDR 0 1 0 1 ⎯ 0 1 0 1 0 1 ⎯
Pin
function
PG4
input
PG4
output
PG4
input
PG4
output
BREQO
output
PG4
input
PG4
output
PG4
input
PG4
output
PG4 input PG4
output
BREQO output