Rev. 2.10
166
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Rev. 2.10
167
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HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
CP0C Register
Bit
7
6
5
4
3
2
1
0
Name
C0SEL
C0EN
C0POL
C0OUT
C0OS
—
—
C0HYEN
R/W
R/W
R/W
R/W
R
R/W
—
—
R/W
POR
1
0
0
0
0
—
—
1
Bit 7
C0SEL
: Select Comparator pins or I/O pins
0: I/O pin select
1: Comparator pin select
This is the Comparator pin or I/O pin select bit. If the bit is high the comparator will
be selected and the two comparator input pins will be enabled. As a result, these two
pins will lose their I/O pin functions. Any pull-high configuration options associated
with the comparator shared pins will also be automatically disconnected.
Bit 6
C0EN
: Comparator On/Off control
0: Off
1: On
This is the Comparator on/off control bit. If the bit is zero the comparator will be
switched off and no power consumed even if analog voltages are applied to its inputs.
For power sensitive applications this bit should be cleared to zero if the comparator is
not used or before the device enters the SLEEP or IDLE mode.
Bit 5
C0POL
: Comparator output polarity
0: Output not inverted
1: Output inverted
This is the comparator polarity bit. If the bit is zero then the C0OUT bit will reflect
the non-inverted output condition of the comparator. If the bit is high the comparator
C0OUT bit will be inverted.
Bit 4
C0OUT
: Comparator output bit
C0POL=0
0: C0+ < C0-
1: C0+ > C0-
C0POL=1
0: C0+ > C0-
1: C0+ < C0-
This bit stores the comparator output bit. The polarity of the bit is determined by the
voltages on the comparator inputs and by the condition of the C0POL bit.
Bit 3
C0OS
: Output path select
0: C0X pin
1: Internal use
This is the comparator output path select control bit. If the bit is set to "0" and the
C0SEL bit is "1" the comparator output is connected to an external C0X pin. If the
bit is set to "1" or the C0SEL bit is "0" the comparator output signal is only used
internally by the device allowing the shared comparator output pin to retain its normal
I/O operation.
Bit 2~1
Unimplemented, read as“0”
Bit 0
C0HYEN
: Hysteresis Control
0: Off
1: On
This is the hysteresis control bit and if set high will apply a limited amount of
hysteresis to the comparator, as specified in the Comparator Electrical Characteristics
table. The positive feedback induced by hysteresis reduces the effect of spurious
switching near the comparator threshold.