HT85F2270 datasheet(83/226 Pages) HOLTEK

83 / 226 page

Rev. 1.00

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Comparator 0 Reset

Comparator 0 contains an output reset function which can provide a reset when the output of

Comparator 0 changes state. The Comparator 0 reset function is enabled by setting the CP0RST

bit in the CP0CR register. If the CP0RST is set high, the comparator 0 output bit, CP0OUT, will

determine if a Comparator 0 reset is generated or not. The CP0RSTL bit determines which polarity

of the CP0OUT bit generates the reset, The CMP0F bit in the RSTSRC register is used to indicate

the Comparator 0 reset source.

CP0CR Register

SFR Address: DEh

Bit

Label

—

CP0ON

CP0POL

CP0OUT

CP0OS

CP0RSTL

CP0RST

—

R/W

—

R/W

—

POR

—

Bit 7

Unimplemented, read as “0”

Bit 6

CP0ON: Comparator 0 on/off bit

Described elsewhere

Bit 5

CP0POL: Comparator 0 output polarity

Described elsewhere

Bit 4

CP0OUT: Comparator 0 output bit

Described elsewhere

Bit 3

CP0OS: Comparator 0 output path selection

Described elsewhere

Bit 2

CP0RSTL: Comparator 0 output reset selection – CP0RST=1

0: CP0OUT=0 will reset MCU

1: CP0OUT=1 will reset MCU

Bit 1

CP0RST: Comparator 0 output reset MCU control

0: Disable

1: Enable

Bit 0

Unimplemented, read as “0”

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