Datasheet

Section 9 I/O Ports
Rev.6.00 Mar. 18, 2009 Page 397 of 980
REJ09B0050-0600
9.14.4 Pin Functions
Port G pins also function as the pins for bus control signal I/Os. The correspondence between the
register specification and the pin functions is shown below.
• PG6/BREQ
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
BRLE, and bit PG6DDR.
Operating
mode
1, 2, 4 7
EXPE — 0 1
BRLE 0 1 — 0 1
PG6DDR 0 1 — 0 1 0 1 —
Pin
function
PG6 input PG6
output
BREQ
input
PG6 input PG6
output
PG6 input PG6
output
BREQ
input
• 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