UPD17073 NEC, UPD17073 Datasheet - Page 177

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

19.2.7
conditions is satisfied.
When two or more halt release conditions are specified, the halt mode is released if any one of the specified
The following example shows how the condition is identified when two or more conditions are specified:
Example
START:
ORG
TMRUP:
KEYDEC:
MAIN:
LOOP:
KEYDEC:
When two or more release conditions are specified
HLTINT
HLTTMR
HLTKEY
INTPIN
BR
INTPIN
EI
RETI
RET
RET
BANK1
MOV
SET1
EI
HALT
SKT1
BR
CALL
BR
BR
Key processing
Processing A
Processing B
Processing C
DAT 1000B
DAT 0010B
DAT 0001B
DAT 0003H
MAIN
P1B, #1111B
IP
HLTINT OR HLTTMR OR HLTKEY
BTM0CY
KEY_DEC
TMRUP
LOOP
LOOP
;
;
;
;
;
;
;
;
;
;
;
;
Vector address symbol definition of INT pin interrupt
INT pin interrupt service
Basic timer 0 processing
Key input processing
Outputs P1B3-P1B0 at high level as key source output
Embedded macro
Enables INT pin interrupt
Specifies external interrupt (INT pin), basic timer 0,
and key input as halt release condition
Embedded macro
Detects BTM0CY flag
Basic timer 0 processing if set to “1”
PD17072,17073
177