HT45F4M datasheet(11/138 Pages) HOLTEK

11 / 138 page

Rev. 1.10

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Rev. 1.10

�an�a�� 1�� 01�

HT45F4M

Lithium Battery Backup Power ASSP MCU

HT45F4M

Lithium Battery Backup Power ASSP MCU

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

IOH�

I/O Po�t So��ce C��ent

(PB4� PB�)

�V

VOH= 0.9VDD

-8

-16

—

�V

VOH= 0.9VDD

-�0

-40

—

VLVR

Low Voltage Reset Voltage

—

-�%×

T�p.

�.��

-�%×

T�p.

VLVD1

Low Voltage Detecto�

Voltage

—

LVDEN= 1� VLVD = �.7V

-�%×

T�p.

�.7

-�%×

T�p.

VLVD�

LVDEN= 1� VLVD = �.0V

�.0

VLVD�

LVDEN= 1� VLVD = �.�V

�.�

VLVD4

LVDEN= 1� VLVD = �.6V

�.6

VLVD�

LVDEN= 1� VLVD = 4.0V

4.0

ILVR

Additional Powe�

Cons�mption if LVR is

�sed

�V

LVR enable

—

�0

4�

μA

�V

—

μA

ILVD

Additional Powe�

Cons�mption if LVD is �sed

�V

LVD disable → LVD enable

(LVR enable)

—

�0

4�

μA

�V

—

μA

RPH

P�ll-high Resistance fo�

I/O Po�ts

�V

—

�0

100

kΩ

�V

—

�0

kΩ

Note:LVRisawaysenabled(HALTmodedisabled)fixed@2.55V.

A.C. Characteristics

Ta= ��°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max. Unit

VDD

Conditions

fCPU

Ope�ating Clock

�.7V~�.�V

—

7.�

MHz

4.�V~�.�V

—

1�

MHz

fSYS

S�stem Clock (HIRC)

�.7V~�.�V

—

7.�

MHz

4.�V~�.�V

—

1�

MHz

fHIRC

HIRC F�eq�enc� (note)

�V

Ta= ��°C

-�%

�0

+�%

MHz

4.0V~�.�V Ta= -10°C~8�°C

-�%

�0

+�%

MHz

�.6V~�.�V Ta= -40°C~8�°C

-10%

�0

+10% MHz

fSUB

S�stem Clock (LIRC)

�V

Ta= ��°C

-10%

��

+10% kHz

�.7V~�.�V Ta= -40°C~8�°C

-�0%

��

+60% kHz

tTIMER

TCKn Inp�t Pin Minim�m

P�lse Width

—

�0

—

tINT

Inte��pt Minim�m P�lse Width

—

�.�

�

μs

tLVR

Low Voltage Width to Reset

—

1�0

�40

480

μs

tLVD

Low Voltage Width to Inte��pt

—

�0

4�

μs

tLVDS

LVDO Stable Time

—

Fo� LVR enable�

LVD off → on

1�

—

μs

tSRESET

Softwa�e Reset Width to Reset

—

4�

1�0

μs

tEERD

EEPROM Read Time

—

�

tSYS

tEEWR

EEPROM W�ite Time

—

�

tSST

S�stem Sta�t-�p Time� Pe�iod

(Wake-�p f�om HALT� fSYS off

at HALT state)

—

fSYS= HIRC

—

tSYS

—

fSYS= LIRC

—

�

—

tSYS

S�stem Sta�t-�p Time� Pe�iod

(Wake-�p f�om HALT� fSYS on

at HALT state)

—

�

—

tSYS

HT45F4M Datasheet(PDF) 11 Page - Holtek Semiconductor Inc

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