Renesas H8S/2319 series Hardware Manual page 316

Pin Selection Method and Pin Functions
PF1/BACK/IRQ1/ The pin function is switched as shown below according to the operating mode,
CS5
and the BRLE bit in BCRL, PF1CS5S bit in PFCR1, and CS25E bit in PFCR2
and PF1DDR bit.
Operating
Mode
BRLE
PF1DDR
CS25E
PF1CS5S
Pin function
PF0/BREQ/IRQ0/ The pin function is switched as shown below according to the operating mode,
CS4
and the BRLE bit in BCRL and PF0CS4S bit in PFCR1 and CS25E bit in
PFCR2 and PF0DDR bit.
Operating
Mode
BRLE
PF0DDR
CS25E
PF0CS4S
Pin function
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. 5.00, 12/03, page 286 of 1088
Modes 4 to 6 *
0
0 1
— 0
— — 0
PF1 PF1
input
output pin
pin
IRQ1 interrupt input pin *
Modes 4 to 6 *
0
0 1
— 0
— — 0
PF0 PF0
input output pin
pin
IRQ0 interrupt input pin *
1
1
—
1 —
1 —
CS5 BACK
PF1
output output input
pin pin
2
1
1
—
1 —
1 —
CS4 BREQ
PF0
output output input
pin pin
2
1
Mode 7 *
—
0 1
— —
— —
PF1
output
pin pin
1
Mode 7 *
—
0 1
— —
— —
PF0
output
pin pin