D12320VF25V Datasheet, PDF (326/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
Pin
PF1/BACK/IRQ1/
CS5
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode,
and the BRLE bit in BCRL, PF1CS5S bit in PFCR1, and CS25E bit in PFCR2
and PF1DDR bit.
Operating
Mode
Modes 4 to 6^*1
Mode 7^*1
BRLE
0
1
—
PF1DDR
0
1
—
0
1
CS25E
—
0
1
—
—
—
PF1CS5S
—
—
0
1
—
—
—
Pin function
PF1
input
pin
PF1
CS5 BACK
output pin output output
pin
pin
IRQ1 interrupt input pin^*2
PF1
input
pin
PF1
output
pin
PF0/BREQ/IRQ0/
CS4
The pin function is switched as shown below according to the operating mode,
and the BRLE bit in BCRL and PF0CS4S bit in PFCR1 and CS25E bit in
PFCR2 and PF0DDR bit.
Operating
Mode
Modes 4 to 6^*1
Mode 7^*1
BRLE
0
1
—
PF0DDR
0
1
—
0
1
CS25E
—
0
1
—
—
—
PF0CS4S
—
—
0
1
—
—
—
Pin function
PF0
input
pin
PF0
CS4 BREQ
output pin output output
pin
pin
IRQ0 interrupt input pin^*2
PF0
input
pin
PF0
output
pin
Notes: 1. Modes 6 and 7 are not available in the ROMless versions.
2. When this pin is used as an external interrupt input, the pin function should be set as a
port (PFn) input pin.
3. Valid only in 8-bit-bus mode.
Rev.7.00 Feb. 14, 2007 page 292 of 1108
REJ09B0089-0700