270
Table 8.20
Port F Pin Functions (cont)
Pin
PF
3
/
LWR
/
IRQ3
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode
and bit PF3DDR.
Operating
Mode
1, 2, 4, 5, 6
*
1
PF3DDR
—
Pin function
LWR
output pin
IRQ3
interrupt input pin
*
2
Notes: 1. Modes 1 to 3 are not available on the F-ZTAT version.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
2. When this pin is used as an external interrupt input, the pin function
should be set as a port (PF
3
) input pin.
The pin function is switched as shown below according to the operating mode,
and WAITE bit in BCRL, and PF2DDR bit.
Operating
Mode
Modes 1, 2, 4, 5, 6
*
1
WAITE
0
PF2DDR
0
1
Pin function
PF
input pin
output pin
IRQ2
interrupt input pin
*
2
Notes: 1. Modes 1 to 3 are not available on the F-ZTAT version.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
2. When this pin is used as an external interrupt input, the pin function
should be set as a port (PF
2
) input pin.
The pin function is switched as shown below according to the operating mode,
and the BRLE bit in BCRL and PF1DDR bit.
Operating
Mode
Modes 1, 2, 4, 5, 6
*
1
BRLE
0
PF1DDR
0
1
Pin function
PF
input pin
output pin
IRQ1
interrupt input pin
*
2
Notes: 1. Modes 1 to 3 are not available on the F-ZTAT version.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
2. When this pin is used as an external interrupt input, the pin function
should be set as a port (PF
1
) input pin.
Modes
Modes 3 and 7
*
1
0
1
PF
3
input pin
PF
3
output pin
PF
2
/
WAIT
/
IRQ2
Modes 3 and 7
*
1
—
0
PF
input pin
1
—
1
PF
WAIT
input pin
PF
output pin
PF
1
/
BACK
/
IRQ1
Modes 3 and 7
*
1
—
0
PF
input pin
1
—
1
PF
BACK
output pin
PF
output pin