Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 513 of 926
REJ09B0283-0300
10.15.4 Port Function Control Register 0 (PFCR0)
PFCR0 performs I/O port control.
Bit Bit Name Initial Value R/W Description
7CS7E 0 R/W
6CS6E 0 R/W
5CS5E 0 R/W
4CS4E 0 R/W
3CS3E 0 R/W
2CS2E 0 R/W
1CS1E 0 R/W
0CS0E 0 R/W
CS7 to CS0 Enable
These bits enable or disable the corresponding CSn
output.
0: Pin is designated as I/O port
1: Pin is designated as CSn output pin
(n = 7 to 0)
10.15.5 Pin Functions
Port G pins also function as 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, 5, 6 3
*
, 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
Note: * Only in H8S/2678R Group.