SMBP2501BPB datasheet(90/107 Pages) SONIX

tên linh kiện	SMBP2501BPB

Giải thích chi tiết về linh kiện	8-Bit Micro-Controller

PDF	107 Pages

Scroll/Zoom	100%

nhà sản xuất	SONIX [SONiX Technology Company]

Trang chủ	http://www.sonix.com.tw

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90 / 107 page

SN8P2501B

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 90

Version 2.1

8.4.4 PWM PROGRAM EXAMPLE



Example: Setup PWM0 output from TC0 to PWM0OUT (P5.4). The external high-speed oscillator clock is

4MHz. Fcpu = Fosc/4. The duty of PWM is 30/256. The PWM frequency is about 1KHz. The PWM clock

source is from external oscillator clock. TC0 rate is Fcpu/4. The TC0RATE2~TC0RATE1 = 110. TC0C =

TC0R = 30.

MOV

A,#01100000B

B0MOV

TC0M,A

; Set the TC0 rate to Fcpu/4

MOV

A,#30

; Set the PWM duty to 30/256

B0MOV

TC0C,A

B0MOV

TC0R,A

B0BCLR

FTC0OUT

; Set duty range as 0/256~255/256.

B0BCLR

FALOAD0

B0BSET

FPWM0OUT

; Enable PWM0 output to P5.4 and disable P5.4 I/O function

B0BSET

FTC0ENB

; Enable TC0 timer



Note: The TC0R is write-only register. Don

’t process them using INCMS, DECMS instructions.



Example: Modify TC0R registers

’ value.

MOV

A, #30H

; Input a number using B0MOV instruction.

B0MOV

TC0R, A

INCMS

BUF0

; Get the new TC0R value from the BUF0 buffer defined by

NOP

; programming.

B0MOV

A, BUF0

B0MOV

TC0R, A



Note: The PWM can work with interrupt request.

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