HT67F60 datasheet(160/242 Pages) HOLTEK

160 / 242 page

Rev. 1.50

160

March 06 , 2012

Rev. 1.50

161

March 06 , 2012

HT67F30/HT67F40/HT67F50/HT67F60

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

Programming Considerations

If the comparator is enabled, it will remain active when the microcontroller enters the SLEEP or

IDLE Mode, however as it will consume a certain amount of power, the user may wish to consider

disabling it before the SLEEP or IDLE Mode is entered.

As comparator pins are shared with normal I/O pins the I/O registers for these pins will be read as

zero (port control register is "1") or read as port data register value (port control register is "0") if the

comparator function is enabled.

●

CP0C Register

Bit

Name

C0SEL

C0EN

C0POL

C0OUT

C0OS

—

C0HYEN

R/W

—

R/W

POR

—

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.

HT67F60 Datasheet(PDF) 160 Page - Holtek Semiconductor Inc

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