SN8A1702AX datasheet(61/112 Pages) SONIX

61 / 112 page

Preliminary

SN8P1702A/SN8P1703A

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

SONiX TECHNOLOGY CO., LTD

Page 61

Revision 0.5

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 TC0M 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. (TC0_Counter=8-bit)

B0BCLR

FTC0X8

;

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. (TC0_Counter=8-bit)

B0BCLR

FTC0X8

; To select TC0=Fcpu/2 as clock source

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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