Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
TC1 CLOCK FREQUENCY OUTPUT (BUZZER)
TC1 timer counter provides a frequency output function. By setting the TC1 clock frequency, the clock signal is output
to P5.3 and the P5.3 general purpose I/O function is auto-disable. The TC1 output signal divides by 2. The TC1 clock
has many combinations and easily to make difference frequency. This function applies as buzzer output to output
multi-frequency.
Figure 8-4The TC1OUT Pulse Frequency
ꢁExample: Setup TC1OUT output from TC1 to TC1OUT (P5.3). The external high-speed clock is 4MHz. The
TC1OUT frequency is 1KHz. Because the TC1OUT signal is divided by 2, set the TC1 clock to
2KHz. The TC1 clock source is from external oscillator clock. TC1 rate is Fcpu/4. The
TC1RATE2~TC1RATE1 = 110, TC1C = TC1R = 131, TC1_Counter=8-bit, TC1X8=0
B0BCLR
MOV
B0MOV
FTC1X8
A,#01100000B
TC1M,A
; Set TC1X8 to 0
; Set the TC1 rate to Fcpu/4
; Set the auto-reload reference value
MOV
B0MOV
B0MOV
A,#131
TC1C,A
TC1R,A
B0BSET
B0BSET
B0BSET
FTC1OUT
FALOAD1
FTC1ENB
; Enable TC1 output to P5.3 and disable P5.3 I/O function
; Enable TC1 auto-reload function
; Enable TC1 timer
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