HT68F04 Holtek Semiconductor, HT68F04 Datasheet - Page 82

• Manufacturer Part Number: HT68F04
• Description: Small Package Enhanced Flash Type 8-Bit MCU
• Manufacturer: Holtek Semiconductor

As the name of the mode suggests, after a comparison
is made, the TM output pin, will change state. The TM
output pin condition however only changes state when
an TnAF or TnBF interrupt request flag is generated af-
ter a compare match occurs from Comparator A or Com-
parator B. The TnPF interrupt request flag, generated
from a compare match from Comparator P, will have no
effect on the TM output pin. The way in which the TM
output pin changes state is determined by the condition
of the TnAIO1 and TnAIO0 bits in the TMnC1 register for
ETM CCRA, and the TnBIO1 and TnBIO0 bits in the
TMnC2 register for ETM CCRB. The TM output pin can
Note:
Rev. 1.00
1. With TnCCLR = 0 the Comparator P match will clear the counter
2. TPnA output pin controlled only by TnAF flag
3. Output pin reset to initial state by TnON bit rising edge
ETM CCRA Compare Match Output Mode - TnCCLR = 0
HT66F03/HT66F04/HT68F03/HT68F04
82
be selected using the TnAIO1, TnAIO0 bits (for the
TPnA pin) and TnBIO1, TnBIO0 bits (for the TPnB pins)
to go high, to go low or to toggle from its present condi-
tion when a compare match occurs from Comparator A
or a compare match occurs from Comparator B. The ini-
tial condition of the TM output pin, which is setup after
the TnON bit changes from low to high, is setup using
the TnAOC or TnBOC bit for TPnA or TPnB output pin.
Note that if the TnAIO1,TnAIO0 and TnBIO1, TnBIO0
bits are zero then no pin change will take place.
April 16, 2010
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