HT66F016 datasheet(65/116 Pages) HOLTEK

65 / 116 page

HT66F016/HT66F017/HT68F016/HT68F017

Rev. 1.00

May 14, 2012

Bit 3

T1OC: TP1 output control bit

Compare match output mode

0: initial low

1: initial high

PWM mode/single pulse output mode

0: active low

1: active high

This is the output control bit for the TM output pin. Its operation depends upon whether TM is

being used in the Compare Match Output Mode or in the PWM Mode/ Single Pulse Output Mode.

It has no effect if the TM is in the Timer/Counter Mode. In the Compare Match Output Mode it

determines the logic level of the TM output pin before a compare match occurs. In the PWM

Mode it determines if the PWM signal is active high or active low.

Bit 2

T1POL: TP1 output polarity control

0: non-invert

1: invert

This bit controls the polarity of the TP1 output pin. When the bit is set high the TM

output pin will be inverted and not inverted when the bit is zero. It has no effect if the TM is in the

Timer/Counter mode.

Bit 1

T1DPX: TM1 PWM period/duty control

0: CCRP - period; CCRA - duty

1: CCRP - duty; CCRA - period

This bit, determines which of the CCRA and CCRP registers are used for period and duty

control of the PWM waveform.

Bit 0

T1CCLR: select TM1 counter clear condition

0: TM1 Comparatror P match

1: TM1 Comparatror A match

This bit is used to select the method which clears the counter. Remember that the Standard

TM contains two comparators, Comparator A and Comparator P, either of which can be selected

to clear the internal counter. With the T1CCLR bit set high, the counter will be cleared when a

compare match occurs from the Comparator A. When the bit is low, the counter will be cleared

when a compare match occurs from the Comparator P or with a counter overflow. A counter

overflow clearing method can only be implemented if the CCRP bits are all cleared to zero. The

T1CCLR bit is not used in the PWM, Single Pulse or Input Capture Mode.

· TM1DL Register

Bit

76543210

Name

R/W

RRRRRRRR

POR

00000000

Bit 7~0

TM1DL: TM1 counter low byte register bit 7~bit 0

TM1 16-bit counter bit 7~bit 0

· TM1DH Register

Bit

76543210

Name

D15

D14

D13

D12

D11

D10

R/W

POR

00000000

Bit 7~0

TM1DH: TM1 counter high byte register bit 7~bit 0

TM1 16-bit Counter bit 15~bit 8

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