SN8A1702AX datasheet(72/112 Pages) SONIX

72 / 112 page

Preliminary

SN8P1702A/SN8P1703A

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

SONiX TECHNOLOGY CO., LTD

Page 72

Revision 0.5

TC1 TIMER COUNTER OPERATION SEQUENCE

The TC1 timer’s sequence of operation can be following.

Set the TC1C initial value to setup the interval time.

Set the TC1ENB to be “1” to enable TC1 timer counter.

TC1C is incremented by one with each clock pulse which frequency is corresponding to TC1M selection.

TC1C overflow if TC1C from FFH to 00H.

When TC1C overflow occur, the TC1IRQ flag is set to be “1” by hardware.

Execute the interrupt service routine.

Users reset the TC1C value and resume the TC1 timer operation.

Example: Setup the TC1M and TC1C without auto-reload function.(TC1_Counter=8-bit, TC1X8=0)

B0BCLR

FTC1X8

;

B0BCLR

FTC1IEN

; To disable TC1 interrupt service

B0BCLR

FTC1ENB

; To disable TC1 timer

MOV

A,#20H

;

B0MOV

TC1M,A

; To set TC1 clock = Fcpu / 64

MOV

A,#74H

; To set TC1C initial value = 74H

B0MOV

TC1C,A

;(To set TC1 interval = 10 ms)

B0BSET

FTC1IEN

; To enable TC1 interrupt service

B0BCLR

FTC1IRQ

; To clear TC1 interrupt request

B0BSET

FTC1ENB

; To enable TC1 timer

Example: Setup the TC1M and TC1C with auto-reload function. (TC1_Counter=8-bit, TC1X8=0)

B0BCLR

FTC1X8

; To select TC1=Fcpu/2 as clock source

B0BCLR

FTC1IEN

; To disable TC1 interrupt service

B0BCLR

FTC1ENB

; To disable TC1 timer

MOV

A,#20H

;

B0MOV

TC1M,A

; To set TC1 clock = Fcpu / 64

MOV

A,#74H

; To set TC1C initial value = 74H

B0MOV

TC1C,A

; (To set TC1 interval = 10 ms)

B0MOV

TC1R,A

; To set TC1R auto-reload register

B0BSET

FTC1IEN

; To enable TC1 interrupt service

B0BCLR

FTC1IRQ

; To clear TC1 interrupt request

B0BSET

FTC1ENB

; To enable TC1 timer

B0BSET

ALOAD1

; To enable TC1 auto-reload function.

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