UPD17062 datasheet(165/298 Pages) RENESAS

165 / 298 page

163

µPD17062

Example

HLTINT

DAT 1000B

; Defines a symbol.

START:

; Address 0000H

MAIN

;

NOP

INTTM:

; Timer interrupt vector address (0003H)

INTTIMER

; Branches to INTTIMER (interrupt handling).

INT0:

; INTNC pin interrupt vector address (0004H)

Process A

; Interrupt requested at the INTNC pin

RETI

INTTIMER:

Process B

; Timer interrupt handling

RETI

MAIN:

SET2

IPBTM0, IPNC

; Built-in macro

; Enables INTNC pin and timer interrupts.

SET1

BTM0CK2

; Built-in macro

LOOP:

; Specifies the timer interrupt time interval as 5 ms.

Process C

; Main routine processing

; Enables all interrupts.

HALT

HLTINT

; Specifies an interrupt as a halt release condition.

;

LOOP

This sample program releases the halt state and performs process B when a timer interrupt request is

accepted. When an interrupt request at the INTNC pin is issued, the program performs process A. It also

performs process C each time the halt state is released.

If an INTNC pin interrupt is requested exactly at the same time with a timer interrupt during the halt state,

the program performs process A for the INTNC pin interrupt, which has a higher hardware priority than the

timer interrupt. When a RETI instruction is executed upon completion of process A, program control is

returned to the BR LOOP instruction at

#, but this instruction will not be executed. Instead, the timer interrupt

request is accepted immediately. The BR LOOP instruction is executed only after a RETI is executed upon

completion of process B (timer interrupt handling).

UPD17062 Datasheet(PDF) 165 Page - Renesas Technology Corp

UPD17062 Datasheet(HTML) 165 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL