Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
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
B0BCLR
B0BCLR
MOV
FTC0X8
FTC0IEN
FTC0ENB
A,#20H
;
; To disable TC0 interrupt service
; To disable TC0 timer
;
B0MOV
MOV
B0MOV
TC0M,A
A,#74H
TC0C,A
; To set TC0 clock = Fcpu / 64
; To set TC0C initial value = 74H
;(To set TC0 interval = 10 ms)
B0BSET
B0BCLR
B0BSET
FTC0IEN
FTC0IRQ
FTC0ENB
; To enable TC0 interrupt service
; To clear TC0 interrupt request
; To enable TC0 timer
ꢁExample: Setup the TC0M and TC0C with auto-reload function. (TC0_Counter=8-bit)
B0BCLR
B0BCLR
B0BCLR
MOV
FTC0X8
FTC0IEN
FTC0ENB
A,#20H
; To select TC0=Fcpu/2 as clock source
; To disable TC0 interrupt service
; To disable TC0 timer
;
B0MOV
MOV
B0MOV
B0MOV
TC0M,A
A,#74H
TC0C,A
TC0R,A
; To set TC0 clock = Fcpu / 64
; To set TC0C initial value = 74H
; (To set TC0 interval = 10 ms)
; To set TC0R auto-reload register
B0BSET
B0BCLR
B0BSET
B0BSET
FTC0IEN
FTC0IRQ
FTC0ENB
ALOAD0
; To enable TC0 interrupt service
; To clear TC0 interrupt request
; To enable TC0 timer
; To enable TC0 auto-reload function.
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