HT82K68A    Multimedia Keyboard Encoder 8-Bit Mask MCU

Revision # 1.70   Modifications made on December 26, 2005

  • A Technical Document section was added.
  • At the A.C. Characteristics table, the fSYS2 entries was modified.
  • In the Application Circuits section, the entries for OSC1, RESETB were modified.

Revision # 1.60   Modifications made on December 16, 2003

  • At the D.C. Characteristics table, the Typ. and Max. values for LED Sink Current were modified.
  • At the Pin Description table, the descriptions for PE2, PE3 and PE4 were modified, with IOL=18mA at VOL=3.4V.

Revision # 1.50   Modifications made on November 28, 2003

  • At the D.C. Characteristics table, IOH1 entries were added and modifications were made on the  Parameter description, as well as the Min. and Typ. values of the IOL and IOH2.

Revision # 1.40   Modifications made on August 7, 2003

  • At the Features section, Pin Assignment section and other related sections, 40-pin DIP package was deleted.
  • The PD flag label was changed to PDF flag.
  • The Mask Option table was modified.
  • The Instruction Definition section was modified, with the first two columns deleted.

Revision # 1.30   Modifications made on March 6, 2003

  • The following were modified at the D.C. Characteristics table:
    • The RPH values for the 5V entries were changed and 3V entries added for RPH, RPH1 and RPH2.
    • The Max. value for the Frequency variation was changed from ±10 to ±20.

Revision # 1.20   Modifications made on February 13, 2003

  • At the Features, D.C. Characteristics sections and other related sections, the previous Operating voltage range of 2.4V~5.5V was changed to 2.2V~5.5V.
  • 2.4 LVR was added to the Features section and all related sections.
  • At the Absolute Maximum Ratings section the -0.3V to 5.5V Supply Voltage range was changed to VSS - 0.3V to VSS + 6.0V.
  • VLVR were added to the D.C. Characteristics table and all related sections. The entries for tPOR were modified in this same table.
  • Low voltage reset - LVR section was added.
  • LVR enable/disable Option was added to the Mask Option table.
  • Package Information section was added.
  • Product Tape and Reel Specifications section was added.

Revision # 1.10   Modifications made on November 20, 2001

  • The Operating Voltage VDD was changed to 2.4V~5.5V. Previously it was 2.8V~5.5V.
  • 20/28-pin SOP package was added to the Pin Assignment section.
  • Description for an external interrupt pin (shared with PC2) was added at the Features section, Block Diagram, Pin Description table, and all the related sections.
  • The D.C. Characteristics table was updated.
  • Description for a special vector location 004H was added at the Program Memory section.
  • The Interrupt section of the Functional description was updated and the INTC register table was modified as well.

Revision # 1.00   Modifications made on December 8, 2001

  • Preliminary texts were deleted from the front page heading and the subsequent pages.

Revision # 0.20   Modifications made on May 4, 2000

  • The General Description was updated.
  • The Application Circuit was updated and LVD was deleted.

Revision # 0.10   Modifications made on December 10, 1999

  • The operating voltage which was originally within the range 2.4V ~ 5.5V was changed to 2.8V ~ 5.5V.
  • The package was changed from  42-pin SKDIP to  42-pin DIP package.

 
 

Product Description