COP8SE National Semiconductor, COP8SE Datasheet - Page 27
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COP8SE
Manufacturer Part Number
COP8SE
Description
8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM
Manufacturer
National Semiconductor
Datasheet
1.COP8SE.pdf
(47 pages)
- Current page: 27 of 47
- Download datasheet (492Kb)
8.0 Interrupts
Programming Example: External Interrupt
WAIT:
INT_EXIT:
SERVICE:
PSW
CNTRL
RBIT
RBIT
SBIT
SBIT
SBIT
JP
.
.
.
.=0FF
VIS
.
.
.
.=01FA
.ADDRW SERVICE
.
.
RETI
.
.
RBIT
.
.
.
JP
INT_EXIT
(Continued)
EXPND, PSW
=00EF
=00EE
0,PORTGC
0,PORTGD
IEDG, CNTRL
EXEN, PSW
GIE, PSW
WAIT
; G0 pin configured Hi-Z
; Ext interrupt polarity; falling edge
; Enable the external interrupt
; Set the GIE bit
; Wait for external interrupt
; The interrupt causes a
; branch to address 0FF
; The VIS causes a branch to
;interrupt vector table
; Vector table (within 256 byte
; of VIS inst.) containing the ext
; interrupt service routine
; Interrupt Service Routine
; Reset ext interrupt pend. bit
; Return, set the GIE bit
27
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