SN8A1702AX datasheet(76/145 Pages) SONIX

76 / 145 page

SN8P1700

8-bit micro-controller build-in 12-bit ADC

SONiX TECHNOLOGY CO., LTD

Page 76

Revision 1.94

TC0 TIMER COUNTER OPERATION SEQUENCE

The TC0 timer counter’s sequence of operation can be following.

Set the TC0C initial value to setup the interval time.

Set the TC0ENB to be “1” to enable TC0 timer counter.

TC0C is incremented by one with each clock pulse which frequency is corresponding to T0M selection.

TC0C overflow when TC0C from FFH to 00H.

When TC0C overflow occur, the TC0IRQ flag is set to be “1” by hardware.

Execute the interrupt service routine.

Users reset the TC0C value and resume the TC0 timer operation.

Example: Setup the TC0M and TC0C without auto-reload function.

B0BCLR

FTC0IEN

; To disable TC0 interrupt service

B0BCLR

FTC0ENB

; To disable TC0 timer

MOV

A,#20H

;

B0MOV

TC0M,A

; To set TC0 clock = fcpu / 64

MOV

A,#74H

; To set TC0C initial value = 74H

B0MOV

TC0C,A

;(To set TC0 interval = 10 ms)

B0BSET

FTC0IEN

; To enable TC0 interrupt service

B0BCLR

FTC0IRQ

; To clear TC0 interrupt request

B0BSET

FTC0ENB

; To enable TC0 timer

Example: Setup the TC0M and TC0C with auto-reload function.

B0BCLR

FTC0IEN

; To disable TC0 interrupt service

B0BCLR

FTC0ENB

; To disable TC0 timer

MOV

A,#20H

;

B0MOV

TC0M,A

; To set TC0 clock = fcpu / 64

MOV

A,#74H

; To set TC0C initial value = 74H

B0MOV

TC0C,A

; (To set TC0 interval = 10 ms)

B0MOV

TC0R,A

; To set TC0R auto-reload register

B0BSET

FTC0IEN

; To enable TC0 interrupt service

B0BCLR

FTC0IRQ

; To clear TC0 interrupt request

B0BSET

FTC0ENB

; To enable TC0 timer

B0BSET

ALOAD0

; To enable TC0 auto-reload function.

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