HT45F4M View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT45F4M

Lithium Battery Backup Power ASSP MCU

Holtek Semiconductor 

HT45F4M

Lithium Battery Backup Power ASSP MCU

General Description

The device is a Flash Memory type 8-bit high performance RISC architecture microcontroller.

Offering users the convenience of Flash Memory multi-programming features, this device also

includes a wide range of functions and features. Other memory includes an area of RAM Data

Memory as well as an area of EEPROM memory for storage of non-volatile data such as serial

numbers, calibration data etc.

Analog features include a multi-channel 12-bit A/D converter, an over voltage protection function,

an over current protection function. Multiple and extremely flexible Timer Modules provide timing,

pulse generation and PWM generation functions. Protective features such as an internal Watchdog

Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and

ESD protection ensure that reliable operation is maintained in hostile electrical environments.

A full choice of HIRC and LIRC oscillator functions are provided including a fully integrated

system oscillator which requires no external components for its implementation. The ability to

operate and switch dynamically between a range of operating modes using different clock sources

gives users the ability to optimise microcontroller operation and minimize power consumption.

The inclusion of flexible I/O programming features, Time-Base functions along with many other

features ensure that the device will find excellent use in applications such as electronic metering,

environmental monitoring, handheld instruments, household appliances, electronically controlled

tools, motor driving in addition to many others.

Block Diagram

F la s h /E E P R O M

P r o g r a m m in g

C ir c u itr y

F la s h

P ro g ra m

M e m o ry

EEPRO M

D a ta

M e m o ry

Low

V o lta g e

D e te c t

W a tc h d o g

T im e r

Low

V o lta g e

R eset

8 - b it

R IS C

M CU

C o re

S ta c k

In te rn a l

R e s e t C ir c u it

In te rru p t

C o n tr o lle r

T im e

B ase

RAM

D a ta

M e m o ry

In te rn a l R C

O s c illa to r

1 2 - B it A /D

C o n v e rte r

OCP

O VP

I/O

T im e r

M o d u le s

Rev. 1.10

7

January 15, 2013

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