HT82B42RE datasheet(2/84 Pages) HOLTEK

2 / 84 page

Rev. 1.10

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Rev. 1.10

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HT82B42R/HT82B42RE

I/O MCU with USB Interface

Table of Contents

Features............................................................................................................ 5

General Description......................................................................................... 5

Selection Table................................................................................................. 6

Block Diagram.................................................................................................. 6

HT8�B��R .............................................................................................................................. 6

HT8�B��RE............................................................................................................................ 7

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

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

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

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

EEPROM Memory D.C. Characteristics ....................................................... 12

A.C. Characteristics....................................................................................... 12

Power-on Reset Characteristics................................................................... 13

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

Clocking and Pipelining......................................................................................................... 13

P�og�a� Counte�................................................................................................................... 1�

Stack ..................................................................................................................................... 1�

A�ith�etic and Logic Unit – ALU ........................................................................................... 1�

Program Memory ........................................................................................... 16

St�uctu�e................................................................................................................................ 16

Special Vecto�s ..................................................................................................................... 17

Look-up Ta�le........................................................................................................................ 18

Ta�le P�og�a� Exa�ple........................................................................................................ 19

Data Memory .................................................................................................. 20

St�uctu�e................................................................................................................................ �0

General Purpose Data Memory .................................................................... 20

Special Function Registers........................................................................... 21

Indi�ect Add�essing Registe� – IAR0� IAR1 ........................................................................... �1

Me�o�y Pointe� – MP0� MP1................................................................................................ ��

Accu�ulato� – ACC............................................................................................................... ��

P�og�a� Counte� Low Registe� – PCL.................................................................................. ��

Look-up Ta�le Registe�s – TBLP� TBLH� TBHP .................................................................... �3

Status Registe� – STATUS.................................................................................................... �3

Bank Pointe� – BP................................................................................................................. ��

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