HT45F4M datasheet(36/138 Pages) HOLTEK

36 / 138 page

Rev. 1.10

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Rev. 1.10

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HT45F4M

Lithium Battery Backup Power ASSP MCU

HT45F4M

Lithium Battery Backup Power ASSP MCU

CTRL Register

Bit

Name

FSYSON

—

LVRF

LRF

WRF

R/W

—

R/W

POR

—

Bit7

FSYSON:fSYSControlinIDLEMode

0:disable

1:enable

Bit6~3

Unimplemented,readas0.

Bit2

LVRF:LVRfunctionresetflag

0:notoccur

1:occurred

Thisbitissetto1whenaspecificLowVoltageResetsituationconditionoccurs.This

bitcanonlybeclearedto0bytheapplicationprogram.

Bit1

LRF:LVRControlregistersoftwareresetflag

0:notoccur

1:occurred

Thisbitissetto1iftheLVRCregistercontainsanynondefinedLVRvoltageregister

values.Thisineffectactslikeasoftwareresetfunction.Thisbitcanonlybeclearedto

0bytheapplicationprogram.

Bit0

WRF:WDTControlregistersoftwareresetflag

0:notoccur

1:occurred

This bit is set to 1 b� the WDT Cont�ol �egiste� softwa�e �eset and clea�ed b� the

application p�og�am. Note that this bit can onl� be clea�ed to 0 b� the application

p�og�am.

NO RM AL

f SYS =f H ~f H /6 4

f H o n

CP U ru n

f SYS o n

f TB C o n

f SU B o n

ID LE 1

HA LT i ns tr uc ti on i s ex ec ut ed

CP U st op

ID LE N= 1

FS YS ON =1

f SYS o n

f TB C o n

f SU B o n

ID LE 0

HA LT i ns tr uc ti on i s ex ec ut ed

CP U st op

ID LE N= 1

FS YS ON =0

f SYS o ff

f TB C o n

f SU B o n

SL OW

f SYS =f L

f L o n

CP U ru n

f SYS o n

f TB C o n

f SU B o n

f H o ff

SL EE P

HA LT i ns tr uc ti on i s ex ec ut ed

f SYS o ff

CP U st op

ID LE N= 0

f TB C o ff

f SU B o n

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