HT67F60 datasheet(37/242 Pages) HOLTEK

37 / 242 page

HT67F30/HT67F40/HT67F50/HT67F60

TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPROM

Rev. 1.50

March 06 , 2012

Rev. 1.50

March 06 , 2012

Wr it er _V DD

RE S

DA TA

CL K

Wr it er _V SS

To o t her C ir cu it

DA TA

CL K

VS S

RE S

VD D

Wr it er C onnec to r

Si g nal s

MC U Pr og ra mm in g

Pi ns

Note: * may be resistor or capacitor. The resistance of * must be greater

than 1kΩ or the capacitance of * must be less than 1nF.

Programmer Pin

MCU Pins

RES

PB0

DATA

PA0

CLK

PA2

Programmer and MCU Pins

RAM Data Memory

The Data Memory is a volatile area of 8-bit wide RAM internal memory and is the location where

temporary information is stored. Divided into three sections, the first of these is an area of RAM

where special function registers are located. These registers have fixed locations and are necessary

for correct operation of the device.

Many of these registers can be read from and written to directly under program control, however,

some remain protected from user manipulation. The second area of Data Memory is reserved for

general purpose use. All locations within this area are read and write accessible under program control.

The third area is reserved for the LCD Memory. This special area of Data Memory is mapped directly

to the LCD display so data written into this memory area will directly affect the displayed data.

The addresses of the LCD Memory area overlap those in the General Purpose Data Memory area.

Switching between the different Data Memory banks is achieved by setting the Bank Pointer to the

correct value.

Structure

The Data Memory is subdivided into several banks, all of which are implemented in 8-bit wide

RAM. The Data Memory located in Bank 0 is subdivided into two sections, the Special Purpose

Data Memory and the General Purpose Data Memory.

The start address of the Data Memory for all devices is the address 00H. Registers which are

common to all microcontrollers, such as ACC, PCL, etc., have the same Data Memory address. The

LCD Memory is mapped into Bank 1. The Banks 2 to 5 contain only General Purpose Data Memory

for those devices with larger Data Memory capacities. As the Special Purpose Data Memory

registers are mapped into all bank areas, they can subsequently be accessed from any bank location.

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