Holtek HT66F20 Manual page 134

A/d flash mcu with eeprom
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Co�nter
Co�nter Val�e
overflow
CCRP = 0
0x3FF/
0xFFFF
CCRP
CCRA
TnON bit
TnPAU bit
TnPOL bit
CCRP Int.
Flag TnPF
CCRA Int.
Flag TnAF
TM O/P Pin
O�tp�t Pin set
O�tp�t Toggle
to Initial Level
with TnAF flag
Low if TnOC = 0
Here TnIO�� TnIO0 = ��
Toggle O�tp�t Select
Note: 1. With TnCCLR=0, a Comparator P 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
Rev. 2.50
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
CCRP > 0
Co�nter cleared by CCRP val�e
CCRP > 0
Pa�se
O�tp�t not affected by
TnAF flag. Remains High
Now TnIO�� TnIO0 = �0
�ntil reset by TnON bit
Active High O�tp�t
Select
Compare Match Output Mode – TnCCLR=0
�34
A/D Flash MCU with EEPROM
TnCCLR = 0; TnM[�:0] = 00
Res�me
Co�nter
Stop
Reset
O�tp�t inverts
when TnPOL is high
O�tp�t Pin
Reset to initial val�e
O�tp�t controlled
by other pin-shared f�nction
Time
��ne 22� 20��

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