SM89516B datasheet(44/49 Pages) SYNCMOS

44 / 49 page

SM89516B

8-Bit Micro-controller

64KB Flash

& 1KB RAM embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M087

Ver D SM89516B 08/07/2015

- 44 -

12. Pulse Width Modulation (PWM)

There are two PWM channels in SM89516B. The resolution of PWM channel can be 8-bit or 5-bit depending on the

setting on corresponding PBS bit in PWMCn register, where n-0 or 1.

PWMTB

(8-bit timer)

PWMPS

(2-bit timer)

MUX

{ PFS1,PFS0 }

PWMCLK

PWMDn[7:5]

PWMDn[4:0]

8-bit or 5-bit Logic

Comparator

COUNT[7:0]

CMPOUT

PWMOUTn

Figure : PWMn functional block

To P1.2 and P1.3

PBS

( 1 for 5-bit PWM)

n=0,1

System clock

Mnemonic

Description

Dir.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

RST

PWM

P1CON

P1 Control

9BH

SDAE

SCLE

PWM1E

PWM0E

00H

PWMC0

PWM Control

D3H

PBS

PFS1

PFS0

00H

PWMC1

PWM Control

D4H

PBS

PFS1

PFS0

00H

PWMD0

PWM Data

B3H

D0.7

D0.6

D0.5

D0.4

D0.3

D0.2

D0.1

D0.0

00H

PWMD1

PWM Data

B4H

D1.7

D1.6

D1.5

D1.4

D1.3

D1.2

D1.1

D1.0

00H

Mnemonic: P1CON

Address: 9Bh

Reset

SDAE

SCLE

PWM1E

PWM0E

00h

PWM1E: Set 1 to configure P1[3] as PWM channel 1 output.

PWM0E: Set 1 to configure P1[2] as PWM channel 0 output.

Mnemonic: PWMC[0:1]

Address: D3h and D4h

Reset

PBS

PFS1

PFS0

00h

PBS: When set, the PWM is 5 bits resolution.

PFS [1:0]: The PWM clock divider select.

PFS1

PFS0

PWM clock divider select

SM89516B Datasheet(PDF) 44 Page - SyncMOS Technologies,Inc

SM89516B Datasheet(HTML) 44 Page - SyncMOS Technologies,Inc

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