HT67F60 datasheet(126/242 Pages) HOLTEK

126 / 242 page

Rev. 1.50

126

March 06 , 2012

Rev. 1.50

127

March 06 , 2012

HT67F30/HT67F40/HT67F50/HT67F60

TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPRO

Counter Value

0x3FF

CCRP

CCRA

TnON

TnPAU

TnPOL

CCRP Int.

Flag TnPF

CCRA Int.

Flag TnAF

TM O/P Pin

Time

CCRA=0

CCRA = 0

Counter overflow

CCRA > 0 Counter cleared by CCRA value

Pause

Resume

Stop

Counter Restart

TnCCLR = 1; TnM [1:0] = 00

Output pin set to

initial Level Low

if TnOC=0

Output Toggle with

TnAF flag

Note TnIO [1:0] = 10

Active High Output select

Here TnIO [1:0] = 11

Toggle Output select

Output not affected by

TnAF flag. Remains High

until reset by TnON bit

Output Pin

Reset to Initial value

Output controlled by

other pin-shared function

Output Inverts

when TnPOL is high

TnPF not

generated

No TnAF flag

generated on

CCRA overflow

Output does

not change

Compare Match Output Mode — TnCCLR = 1

Note: 1. With TnCCLR=1 a Comparator A match will clear the counter

2. The TM output pin is controlled only by the TnAF flag

3. The output pin is reset to its initial state by a TnON bit rising edge

4. A TnPF flag is not generated when TnCCLR=1

Timer/Counter Mode

To select this mode, bits TnM1 and TnM0 in the TMnC1 register should be set to 11 respectively.

The Timer/Counter Mode operates in an identical way to the Compare Match Output Mode

generating the same interrupt flags. The exception is that in the Timer/Counter Mode the TM output

pin is not used. Therefore the above description and Timing Diagrams for the Compare Match

Output Mode can be used to understand its function. As the TM output pin is not used in this mode,

the pin can be used as a normal I/O pin or other pin-shared function.

PWM Output Mode

To select this mode, bits TnM1 and TnM0 in the TMnC1 register should be set to 10 respectively

and also the TnIO1 and TnIO0 bits should be set to 10 respectively. The PWM function within the

TM is useful for applications which require functions such as motor control, heating control,

illumination control etc. By providing a signal of fixed frequency but of varying duty cycle on the

TM output pin, a square wave AC waveform can be generated with varying equivalent DC RMS

values.

As both the period and duty cycle of the PWM waveform can be controlled, the choice of generated

waveform is extremely flexible. In the PWM mode, the TnCCLR bit has no effect as the PWM

period. Both of the CCRA and CCRP registers are used to generate the PWM waveform, one register

is used to clear the internal counter and thus control the PWM waveform frequency, while the other

one is used to control the duty cycle. Which register is used to control either frequency or duty cycle

is determined using the TnDPX bit in the TMnC1 register. The PWM waveform frequency and duty

cycle can therefore be controlled by the values in the CCRA and CCRP registers.

HT67F60 Datasheet(PDF) 126 Page - Holtek Semiconductor Inc

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