HT66F24D View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT66F24D' PDF : 177 Pages View PDF
A/D Flash Type 8-bit MCU with EEPROM
HT66F24D/HT66F25D
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.
Structure
Divided into two sections, the first of these is an area of RAM, known as the Special Function Data
Memory. Here are located registers which 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 known as the General Purpose Data Memory, which is reserved
for general purpose use. All locations within this area are read and write accessible under program
control.
The Special Purpose Data Memory registers are accessible in all banks. Switching between the
different Data Memory banks is achieved by setting the Bank Pointer to the correct value. The start
address of the Data Memory for all devices is the address 00H.
00H
Spe�ial Pu�pose
Data �emo�y
�FH
40H
Gene�al Pu�pose
Data �emo�y
Bank 0
00H
Spe�ial Pu�pose
Data �emo�y
�FH
40H
EEC in bank 1
9FH
Bank 0
HT66F24D
Data Memory Structure
Gene�al Pu�pose
Data �emo�y
Bank 0
EEC in bank 1
00H
Spe�ial Pu�pose
Data �emo�y
7FH
Device80H
HT66F24D
Gene�aHl PTu�p6o6seF25D
Data �emo�y
FFH
Bank 0
FFH
Bank 0
HT66F25D
Data Memory Structure
RAM DEEaCtinabaMnke1mory Structure
Capacity
96 x 8
192 x 8
General Purpose Data Memory Structure
Bank 0
Bank 1
Bank �
HT66F26D
Data Memory Structure
Address
40H ~ 9FH
40H ~ FFH
Rev. 1.10
25
March 25, 2013
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