參數(shù)資料
型號: COP885BC
廠商: National Semiconductor Corporation
英文描述: 8-Bit CMOS ROM Based Microcontrollers with 2k Memory, Comparators, and CAN Interface(8位基于CMOS ROM帶2K存儲器,比較器和CAN接口的微控制器)
中文描述: 8位的CMOS基于ROM與2K內(nèi)存,比較器和CAN接口(8位基于ROM的帶2K的CMOS存儲器,比較器和CAN微控制器接口的微控制器)
文件頁數(shù): 43/57頁
文件大?。?/td> 677K
代理商: COP885BC
Interrupts
(Continued)
Programming Example: External Interrupt
PSW
CNTRL
RBIT
RBIT
SBIT
SBIT
SBIT
WAIT:
JP
.
.
.
.=0FF
VIS
=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
.
.
.
.=01FA
.ADDRW SERVICE
; Vector table (within 256 byte
; of VIS inst.) containing the ext
; interrupt service routine
.
.
INT_EXIT:
RETI
.
.
RBIT
SERVICE:
EXPND, PSW
; Interrupt Service Routine
; Reset ext interrupt pend. bit
.
.
.
JP
INT_EXIT
; Return, set the GIE bit
C
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