HT85F2250 datasheet(2/187 Pages) HOLTEK

2 / 187 page

Rev. 1.10

� of 187

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A/D Flash 8051 Core Low Pin Count MCU

HT85F2250/HT85F2262

Table of Contents

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

CPU Feat�res.................................................................................................................... 14

Periphera� Feat�res........................................................................................................... 1�

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

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

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

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

6 Pin Descriptions ................................................................................................... 21

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

8 D.C. Characteristics.............................................................................................. 24

9 A.C. Characteristics.............................................................................................. 26

10 ADC Electrical Characteristics .......................................................................... 27

11 Comparator Electrical Characteristics.............................................................. 28

12 Power on Reset Electrical Characteristics....................................................... 29

13 System Architecture........................................................................................... 29

14 Program Counter ................................................................................................ 30

15 Stack .................................................................................................................... 30

16 Arithmetic and Logic Unit – ALU....................................................................... 31

17 Flash Program Memory...................................................................................... 32

Str�ct�re............................................................................................................................ ��

Specia� Vectors.................................................................................................................. ��

In-Circ�it Programming – ICP ........................................................................................... ��

On-Chip Deb�g S�pport – OCDS ..................................................................................... ��

In-App�ication Programming – IAP .................................................................................... ��

F�ash Program Memor� Resisters..................................................................................... �4

F�ash Memor� Read/Write Operations.............................................................................. �8

Un�ocking the F�ash Memor�........................................................................................................ �8

Page Erase Operation.................................................................................................................. �9

B�te Read Operation.................................................................................................................... 40

B�te Write Operation .................................................................................................................... 41

Program Memor� Protection ............................................................................................. 4�

HT85F2250 Datasheet(PDF) 2 Page - Holtek Semiconductor Inc