SONIX SN8P27142_2715, User Manual

Page: 64 / 130

SN8P2714X_2715
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 64
V1.4
8.2.5 TC0 TIMER COUNTER OPERATION SEQUENCE
The TC0 timer counter’s sequence of operation can be following.
¾ Set the TC0C initial value to setup the interval time.
¾ Set the TC0ENB to be “1” to enable TC0 timer counter.
¾ TC0C is incremented by one with each clock pulse which frequency is corresponding to T0M selection.
¾ TC0C overflow when TC0C from FFH to 00H.
¾ When TC0C overflow occur, the TC0IRQ flag is set to be “1” by hardware.
¾ Execute the interrupt service routine.
¾ 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,#00H ;
B0MOV TC0M,A ; To set TC0 clock = fcpu / 256
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
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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,#00H ;
B0MOV TC0M,A ; To set TC0 clock = fcpu / 256
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.