HT45F77 datasheet(16/203 Pages) HOLTEK

16 / 203 page

Rev. 1.20

1�

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45F77

Body Fat Scale Flash MCU

HT45F77

Body Fat Scale Flash MCU

A.C. Characteristics

Ta=25°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max. Unit

VDD

Conditions

fSYS1

Syste� Clo�k (HXT)

2.2~5.5V

─

0.�

─

MHz

2.7~5.5V

0.�

─

MHz

3.3~5.5V

0.�

─

MHz

�.5~5.5V

0.�

─

1�

MHz

fSYS2

Syste� Clo�k (HIRC)

Ta=25°C

-2%

�.8×2

+2% MHz

fSYS3

Syste� Clo�k (LXT)

─

327�8

─

fLIRC

Syste� Clo�k (LIRC)

Ta=25°C

-10%

+10% kHz

2.2V~5.5V Ta=-�0°C~85°C

-50%

+�0% kHz

tSST

Syste� Sta�t-up Ti�e� Pe�iod

(Wake-up f�o� HALT)

─

fSYS=HXT o� LXT

─

102�

─

tSYS

fSYS=HIRC

─

1�

─

fSYS=LIRC

─

1~2

─

tRSTD

Syste� Reset Delay Ti�e

(Powe� On Reset)

─

100

�s

Syste� Reset Delay Ti�e

(Any Reset ex�ept Powe� On Reset)

─

8.3

1�.7

33.3

�s

tINT

Inte��upt Pulse Width

─

μs

tLVR

Low Voltage Width to Reset

─

120

2�0

�80

μs

tLVD

Low Voltage Width to Inte��upt

─

�0

120

2�0

μs

tLVDS

LVDO Sta�le Ti�e

─

Fo� LVR ena�le�

LVD off → on

─

μs

─

Fo� LVR disa�le�

LVD off → on

─

150

μs

tEERD

EEPROM Read Ti�e

─

�

tSYS

tEEWR

EEPROM W�ite Ti�e

─

�

�s

tTIMER

TCKn and Ti�e� Captu�e Input Pulse

Width

─

0.3

─

μs

Note:tSYS=1/fSYS

HT45F77 Datasheet(PDF) 16 Page - Holtek Semiconductor Inc

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