SN8P1602AS datasheet(57/94 Pages) SONIX

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SN8P1600

8-bit micro-controller

SONiX TECHNOLOGY CO., LTD

Page 57

Revision 1.94

TC1M MODE REGISTER

The TC1M is an 8-bit read/write timer mode register. By loading different value into the TC1M register, users can

modify the timer frequency dynamically as program executing.

Eight rates for TC1 timer can be selected by TC0RATE1 ~ TC1RATE2 bits. The range is from fcpu/2 to fcpu/256. The

TC1M initial value is zero and the rate is fcpu/256. The bit7 of TC1M named TC1ENB is the control bit to start TC1

timer. The combination of these bits is to determine the TC1 timer clock frequency and the intervals.

0DCH

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

TC1M

TC1ENB

TC1rate2

TC1rate1

TC1rate0

ALOAD1

TC1OUT

PWM1OUT

Read/Write

R/W

After reset

TC1ENB: TC1 counter/BZ1/PWM1OUT enable bit. “0” = disable, “1” = enable.

TC1RATE2~TC1RATE0: TC1 internal clock select bits. 000 = fcpu/256, 001 = fcpu/128, … , 110 = fcpu/4, 111 =

fcpu/2.

ALOAD1: TC1 auto-reload control bit, “0” the auto-reload function is disabled. “1 “ is to enable the auto-reload function.

TC1OUT : TC1 Time-out toggle signal output control bit. “0”: No TC1 time-out output signal. “1”: When TC1 time-out

occurs, P5.3 output toggles.

PWM1OUT : PWM output control bit. “0”: No PWM output function. “1”: PWM will output waveform through pin P5.3.

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