HT67F60 datasheet(207/242 Pages) HOLTEK

207 / 242 page

HT67F30/HT67F40/HT67F50/HT67F60

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

Rev. 1.50

206

March 06 , 2012

Rev. 1.50

207

March 06 , 2012

LCD Memory

An area of Data Memory is especially reserved for use for the LCD display data. This data area is

known as the LCD Memory. Any data written here will be automatically read by the internal display

driver circuits, which will in turn automatically generate the necessary LCD driving signals.

Therefore any data written into this Memory will be immediately reflected into the actual display

connected to the microcontroller.

As the LCD Memory addresses overlap those of the General Purpose Data Memory, it s stored in its

own independent Bank 1 area. The Data Memory Bank to be used is chosen by using the Bank

Pointer, which is a special function register in the Data Memory, with the name, BP. To access the

LCD Memory therefore requires first that Bank 1 is selected by writing a value of 01H to the BP

Memory Pointer MP1. With Bank 1 selected, then using MP1 to read or write to the memory area,

starting with address 80H, will result in operations to the LCD Memory. Directly addressing the

Display Memory is not applicable and will result in a data access to the Bank 0 General Purpose

Data Memory.

The accompanying LCD Memory Map diagrams shows how the internal LCD Memory is mapped

to the Segments and Commons of the display for the devices. LCD Memory Maps for devices with

smaller memory capacities can be extrapolated from these diagrams.

80H

98H

81 H

SE G 0

SE G 24

SE G 1

SE G 23

97H

SE G 0

SE G 24

SE G 1

SE G 23

80H

81 H

98H

97H

1/ 2 bi as o r 1/ 3 bi as

1/ 4 bi as

: U nus ed, R ead as " 0"

HT67F30 LCD Memory Map

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