HT45R34 datasheet(16/41 Pages) HOLTEK

номер детали	HT45R34

подробное описание детали	C/R to F Type 8-Bit OTP MCU

PDF	41 Pages

Scroll/Zoom	100%

производитель	HOLTEK [Holtek Semiconductor Inc]

домашняя страница	http://www.holtek.com

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16 / 41 page

HT45R34

Rev. 1.20

October 15, 2007

External RC oscillation converter mode example program - Timer A overflow:

clr RCOCCR

mov a, 00000010b

; Enable External RC oscillation mode and set Timer A overflow

mov RCOCR,a

clr intc1.4

; Clear External RC Oscillation Converter interrupt request flag

mov a, low (65536-1000)

; Give timer A initial value

mov tmral, a

; Timer A count 1000 time and then overflow

mov a, high (65536-1000)

mov tmrah, a

mov a, 00h

; Give timer B initial value

mov tmrbl, a

mov a, 00h

mov tmrbh, a

mov a, 00110000b

; Timer A clock source=fSYS/4 and timer on

mov RCOCCR, a

p10:

clr wdt

snz intc1.4

; Polling External RC Oscillation Converter interrupt request flag

jmp p10

clr intc1.4

; Clear External RC Oscillation Converter interrupt request flag

; Program continue

T i m e r A

T i m e r B

O V B = 1

O V B = 0

E x t e r n a l R C O s c i l l a t i o n C o n v e r t e r I n t e r r u p t

R e s e t R C O C O N

R C O S C O u t p u t

S 2

S 1

S y s t e m C l o c k

S y s t e m C l o c k / 4

R C O C O N

External RC Oscillation Converter

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