SYNPWM datasheet(12/57 Pages) FEELING

12 / 57 page

FM8P73B

Web site: http://www.feeling-tech.com.tw

Rev1.0 Nov 20, 2013

P.12/FM8P73B

FEELING

TECHNOLOGY

2.1.6

Timer1: 8-bit Timer & PWM1 Period

The Timer1 is an 8-bit down-count timer which include latch register. Please refer to 2.3 for detail Timer

description.

The Timer1 can also be combined with Timer2 as PWM1 period and duty and controlled by the register

PWM1CON. Please refer to 2.4 for detail PWM description.

2.1.6.1

T1CON (Timer1 Control Register)

Address

Name

0Bh (r/w)

T1CON

T1EN

T1LOAD

T1SO1

T1SO0

T1EDG

T1PS2

T1PS1

T1PS0

T1EN : TMR1 (PWM) Enable/Disable

= 1, TMR1 (PWM1) Enable.

= 0, TMR1 (PWM1) Disable.

T1LOAD : Enable/Disable Latch Buffer automatically load to counter register while writing to latch register

= 1, Enable TMR1 latch buffer automatically load to counter register while writing to latch register.

= 0, Disable TMR1 latch buffer automatically load to counter register while writing to latch register.

Note: This bit is only affected after latch register written. When the timer underflows, the latch register

data will automatically load into counter register.

T1SO1:T1SO0 : TMR1 clock source selection

T1SO1

T1SO0

TMR1 clock source

TMCKI(IOB2)

Internal instruction clock cycle

Fosc

Fosc*2

T1EDG : TMR1 clock edge selection. This bit works only when external clock source TMCKI (IOB2) selected.

= 1, TMR1 increased on falling edge of TMCKI pin.

= 0, TMR1 increased on rising edge of TMCKI pin.

T1PS2:T1PS0 : TMR1 Prescaler selection

T1PS2 : T1PS0

TMR1 Prescal rate

1:1

1:2

1:4

1:8

1:16

1:32

1:64

1:128

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