SN8P1600
8-bit micro-controller
INTERRUPT OPERATION DESCRIPTION
SN8P1600 provides 2 interrupts. Each operation of the 2 interrupts is as following.
GIE GLOBAL INTERRUPT OPERATION
GIE is the global interrupt control bit. All interrupts start work after the GIE = 1. It is necessary for interrupt service
request. One of the interrupt requests occurs, and the program counter (PC) points to the interrupt vector (ORG 8) and
the stack add 1 level.
0DFH
STKP
Read/Write
After reset
Bit 7
GIE
R/W
0
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
STKPB2
R/W
Bit 1
STKPB1
R/W
Bit 0
STKPB0
R/W
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
GIE: Global interrupt control bit. 0 = disable, 1 = enable.
ꢃ
ꢂ
Example: Set global interrupt control bit (GIE).
B0BSET FGIE
; Enable GIE
Note: Set GIE bit as “1’ to enable all interrupt.
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