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

Table of Contents

Features............................................................................................................. 6

CPU Features.......................................................................................................................... 6

Peripheral Features.................................................................................................................. 6

General Description ......................................................................................... 7

Block Diagram................................................................................................... 7

Pin Assignment................................................................................................. 8

Pin Description................................................................................................. 9

Absolute Maximum Ratings........................................................................... 10

D.C. Characteristics........................................................................................ 10

A.C. Characteristics.........................................................................................11

ADC Electrical Characteristics...................................................................... 12

Over Voltage/Current circuit Electrical Characteristics.............................. 13

Power on Reset Electrical Characteristics................................................... 13

System Architecture....................................................................................... 14

Clocking and Pipelining.......................................................................................................... 14

Program Counter.................................................................................................................... 15

Stack...................................................................................................................................... 16

Arithmetic and Logic Unit – ALU............................................................................................ 16

Flash Program Memory.................................................................................. 17

Structure................................................................................................................................. 17

Special Vectors...................................................................................................................... 17

Look-up Table......................................................................................................................... 18

Table Program Example......................................................................................................... 19

In Circuit Programming.......................................................................................................... 20

On-Chip Debug Support – OCDS.......................................................................................... 21

RAM Data Memory.......................................................................................... 21

Structure................................................................................................................................. 21

Special Function Register Description......................................................... 23

Indirect Addressing Registers – IAR0, IAR1.......................................................................... 23

Memory Pointers – MP0, MP1............................................................................................... 23

Bank Pointer – BP.................................................................................................................. 24

Accumulator – ACC................................................................................................................ 24

Program Counter Low Register – PCL................................................................................... 24

Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 24

Status Register – STATUS..................................................................................................... 25

EEPROM Data Memory................................................................................... 27

EEPROM Data Memory Structure......................................................................................... 27

EEPROM Registers............................................................................................................... 27

Reading Data from the EEPROM ......................................................................................... 29

Rev. 1.10

2

January 15, 2013

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