HT82B42R datasheet(2/86 Pages) HOLTEK

2 / 86 page

Rev. 1.00

October 27, 2011

Rev. 1.00

October 27, 2011

HT82B42R/HT82B42RE

I/O MCU with USB Interface

Table of Contents

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

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

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

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

HT82B42R .............................................................................................................................. 6

HT82B42RE............................................................................................................................ 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

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

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

Program Counter................................................................................................................... 13

Stack ..................................................................................................................................... 15

Arithmetic and Logic Unit – ALU ........................................................................................... 15

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

Structure................................................................................................................................ 16

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

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

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

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

Structure................................................................................................................................ 20

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

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

Indirect Addressing Register – IAR0, IAR1 ........................................................................... 21

Memory Pointer – MP0, MP1................................................................................................ 22

Accumulator – ACC............................................................................................................... 22

Program Counter Low Register – PCL.................................................................................. 22

Look-up Table Registers – TBLP, TBLH, TBHP .................................................................... 23

Status Register – STATUS.................................................................................................... 23

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

Input/Output Ports......................................................................................... 25

Pull-high Resistors ................................................................................................................ 25

Port A CMOS/NMOS/PMOS Structure.................................................................................. 25

Port A VDD/V33O Option Structure....................................................................................... 25

Port Pin Wake-up .................................................................................................................. 25

I/O Port Control Registers..................................................................................................... 26

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