GMS84512 Datasheet, PDF (64/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
PORT FUNCTION SELECTION REGISTER
FUNC
<00CA_H>
¦¡
¦¡
¦¡
W
W
W
W
W
7
6
5
4
3
2
1
0
¦¡
¦¡
¦¡ EC3S EC2S INT3S INT2S INT1S
Initial Value (at RESET)
[ ---0 0000 ]
R27 / EC3 Selection
0 : R27 ( Input, Output )
1 : EC3 ( Input )
R26 / EC2 Selection
0 : R26 ( Input, Output )
1 : EC2 ( Input )
R30 / INT1 Selection
0 : R30 ( Input )
1 : INT1 ( Input )
R31/ INT2 Selection
0 : R31 ( Input )
1 : INT2 ( Input )
R17 / INT3 Selection
0 : R17 ( Input )
1 : INT3 ( Input )
EXT. INTERRUPT EDGE SELECTION REGISTER
IEDS
<00CB_H>
¦¡
¦¡
W
W
W
W
W
W
7
6
5
4
3
2
1
0
¦¡
¦¡ IED3H IED3L IED2H IED2L IED1H IED1L
Initial Value(at RESET)
[ --00 0000 ]
Edge selection of external INT input
signal.
00 : No Input Selection
01 : Falling Edge Selection
10 : Rising Edge Selection
11 : Both of Edge All Selection
TABLE 3.7.1 Measurement Interrupt Interval and Edge Selection
Period
Sym IED*H
bol
¨Í
1
¨Î
0
IED*L
0
1
INT Input Signal
Width of ¨Ï
1
1
Pulse
¨Ð
1
1
¨Í
¨Î
¨Ï
¨Ð
FIG 3.7.2 The Kind of Interrupt Interval
3 - 39