MS51
Dec. 17, 2019
Page
201
of 316
Rev 1.01
M
S51
SE
RIES
TE
CHNICA
L REF
ERE
N
CE MA
NU
A
L
PICON
– Pin Interrupt Control
Regiser
Address
Reset Value
PICON
E9H, all pages
0000_0000b
7
6
5
4
3
2
1
0
PIT67
PIT45
PIT3
PIT2
PIT1
PIT0
PIPS[1:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Name
Description
7
PIT67
Pin interrupt channel 6 and 7 type select
This bit selects which type that pin interrupt channel 6 and 7 is triggered.
0 = Level triggered.
1 = Edge triggered.
6
PIT45
Pin interrupt channel 4 and 5 type select
This bit selects which type that pin interrupt channel 4 and 5 is triggered.
0 = Level triggered.
1 = Edge triggered.
5
PIT3
Pin interrupt channel 3 type select
This bit selects which type that pin interrupt channel 3 is triggered.
0 = Level triggered.
1 = Edge triggered
4
PIT2
Pin interrupt channel 2 type select
This bit selects which type that pin interrupt channel 2 is triggered.
0 = Level triggered.
1 = Edge triggered.
3
PIT1
Pin interrupt channel 1 type select
This bit selects which type that pin interrupt channel 1 is triggered.
0 = Level triggered.
1 = Edge triggered.
2
PIT0
Pin interrupt channel 0 type select
This bit selects which type that pin interrupt channel 0 is triggered.
0 = Level triggered.
1 = Edge triggered.
1:0
PIPS[:0]
Pin interrupt port select
This field selects which port is active as the 8-channel of pin interrupt.
00 = Port 0.
01 = Port 1.
10 = Port 2.
11 = Port 3.
