HT85F2270 datasheet(2/226 Pages) HOLTEK

2 / 226 page

Rev. 1.00

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Table of Contents

1 Features................................................................................................................. 14

CPU Features.................................................................................................................... 14

Peripheral Features........................................................................................................... 1�

2 General Description ............................................................................................. 16

3 Selection Table...................................................................................................... 17

4 Block Diagram....................................................................................................... 18

5 Pin Assignment..................................................................................................... 19

6 Pin Descriptions ................................................................................................... 20

7 Absolute Maximum Ratings................................................................................. 23

8 D.C. Characteristics.............................................................................................. 23

9 A.C. Characteristics.............................................................................................. 25

10 ADC Electrical Characteristics ......................................................................... 26

11 DAC Electrical Characteristics .......................................................................... 26

12 Comparator Electrical Characteristics ............................................................. 27

13 Power on Reset Electrical Characteristics....................................................... 28

14 System Architecture........................................................................................... 28

15 Program Counter ................................................................................................ 29

16 Stack .................................................................................................................... 29

17 Arithmetic and Logic Unit – ALU....................................................................... 30

18 Flash Program Memory...................................................................................... 31

Structure............................................................................................................................ �1

Special Vectors.................................................................................................................. �1

In-Circuit Programming – ICP ........................................................................................... ��

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

In-Application Programming – IAP .................................................................................... ��

Flash Program �emor� Resisters..................................................................................... ��

Flash �emor� Read/Write Operations.............................................................................. �7

Unlocking the Flash �emor�........................................................................................................ �7

Page Erase Operation.................................................................................................................. �8

B�te Read Operation.................................................................................................................... �9

B�te Write Operation .................................................................................................................... 40

HT85F2270 データシート(PDF) 2 Page - Holtek Semiconductor Inc

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