HT56R26 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT56R26' PDF : 134 Pages View PDF
HT56R22/HT56R23/HT56R24/HT56R25/HT56R26
· PFD Programming Example
org 04h
; external interrupt vector
org 08h
; Timer Counter 0 interrupt vector
jmp tmr0int
; jump here when Timer 0 overflows
:
:
org 20h
; main program
:
:
;internal Timer 0 interrupt routine
tmr0int:
:
; Timer 0 main program placed here
:
:
begin:
;setup Timer 0 registers
mov a,09bh
; setup Timer 0 preload value
mov tmr0,a
mov a,081h
; setup Timer 0 control register
mov tmr0c,a
; timer mode and prescaler set to /2
;setup interrupt register
mov a,00dh
; enable master interrupt and both timer interrupts
mov intc0,a
:
:
set tmr0c.4
; start Timer 0
:
:
Time Base
The device includes a Time Base function which is used to generate a regular time interval signal.
The Time Base time interval magnitude is determined using an internal 12~15 stage counter which sets the division ra-
tio of the clock source. This division ratio is controlled by the time base divider configuration option. The clock source is
selected using a peripheral clock configuration option.
When the Time Base times out, a Time Base interrupt signal will be generated. It should be noted that as the Time Base
clock source is the same as the Timer/Event Counter clock source, care should be taken when programming.
Rev. 1.30
57
December 26, 2014
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