SN8A1702AX datasheet(74/112 Pages) SONIX

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Preliminary

SN8P1702A/SN8P1703A

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

SONiX TECHNOLOGY CO., LTD

Page 74

Revision 0.5

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

FTC1X8

; Set TC1X8 to 0

MOV

A,#01100000B

B0MOV

TC1M,A

; Set the TC1 rate to Fcpu/4

MOV

A,#131

; Set the auto-reload reference value

B0MOV

TC1C,A

B0MOV

TC1R,A

B0BSET

FTC1OUT

; Enable TC1 output to P5.3 and disable P5.3 I/O function

B0BSET

FALOAD1

; Enable TC1 auto-reload function

B0BSET

FTC1ENB

; Enable TC1 timer

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