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Pin
Selection Method and Pin Functions
PF3/LWR/
Switches as follows according to the operating mode and the setting of bits
ADTRG/IRQ3
TRGS1, TRGS0, and PF3DDR.
Operating
Mode
Bus mode
PF3DDR
Pin function
Notes: *1 ADTRG input when TRGS0 = TRGS1 = 1.
PF2/WAIT/SEG1
Switches as follows according to the operating mode, and the setting of bits
7 (H8S/2646,
SGS3 to SGS0, the WAITE bit, and bit PF2DDR.
H8S/2646R,
H8S/2645)
PF2/WAIT/SEG33
(H8S/2648,
Operating Mode
H8S/2648R,
H8S/2647)
Setting of SGS3 to
SGS0
WAITE
PF2DDR
Pin
function
PF0/IRQ2
Switches as follows according to the PF0DDR bit.
PF0DDR
Pin function
286
Modes 4 to 6
16-bit bus
mode
—
LWR output PF3 input
*2 When used as an external interrupt input pin, do not use it as an I/O
pin for other functions.
SEG
output
—
—
H8S/2646,
SEG17
H8S/2646R,
output
H8S/2645
H8S/2648,
SEG33
H8S/2648R,
output
H8S/2647
PF0 input
8-bit bus mode
0
1
PF3 output PF3 input
ADTRG input
IRQ3 input
Modes 4 to 6
Port
0
1
0
1
—
WAIT
PF2
PF2
input
output
input
0
IRQ2 input
Mode 7
—
0
1
PF3 output
*1
*2
Mode 7
SEG
Port
output
1
—
—
0
1
SEG17
PF2
PF2
output
input
output
SEG33
output
1
PF0 output
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