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HT66F0172

Enhanced A/D Flash 8-Bit MCU

Holtek Semiconductor 

HT66F0172/HT66F0174

Enhanced A/D Flash 8-Bit MCU

Table of Contents

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

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

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

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

Selection Table.................................................................................................. 7

Block Diagram................................................................................................... 8

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

Pin Descriptions............................................................................................... 9

Absolute Maximum Ratings............................................................................11

D.C. Characteristics.........................................................................................11

A.C. Characteristics........................................................................................ 13

A/D Converter Characteristics....................................................................... 14

LVD&LVR Electrical Characteristics............................................................. 15

Power on Reset Electrical Characteristics................................................... 15

System Architecture....................................................................................... 16

Clocking and Pipelining.......................................................................................................... 16

Program Counter.................................................................................................................... 17

Stack...................................................................................................................................... 18

Arithmetic and Logic Unit – ALU............................................................................................ 18

Flash Program Memory.................................................................................. 19

Structure................................................................................................................................. 19

Special Vectors...................................................................................................................... 19

Look-up Table......................................................................................................................... 19

Table Program Example......................................................................................................... 20

In Circuit Programming.......................................................................................................... 21

On-Chip Debug Support – OCDS.......................................................................................... 22

RAM Data Memory.......................................................................................... 22

Structure................................................................................................................................. 22

Special Function Register Description......................................................... 24

Indirect Addressing Registers – IAR0, IAR1.......................................................................... 24

Memory Pointers – MP0, MP1............................................................................................... 24

Bank Pointer – BP.................................................................................................................. 25

Accumulator – ACC................................................................................................................ 25

Program Counter Low Register – PCL................................................................................... 25

Look-up Table Registers – TBLP, TBHP, TBLH...................................................................... 25

Status Register – STATUS..................................................................................................... 26

Rev. 1.00

2

July 11, 2013

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