HT46R51A/HT46R52A    A/D Type 8-Bit OTP MCU

Revision # 1.30   Modifications made on March 6, 2009

• The Indirect Addressing Register section was modified.
  
• In the Options section, an MP0/MP1 section was added.
  
• In the Oscillator Configuration section, the system oscillator circuit was modified.
  
• In the Application Circuits diagram, the RC System oscillator resistor value was modified.

Revision # 1.21   Modifications made on December 29, 2008

• The Package Information section was modified.
  
• The Product Tape and Reel Specifications section was modified.

Revision # 1.20   Modifications made on July 4, 2008

• In the D.C. Characteristics section, the t_LVR entries was modified.
  
• In the A.C. Characteristics section, the system clock was modified.
  
• In the Oscillator Configuration section, the value of the external oscillator resistor range was changed.

Revision # 1.10   Modifications made on September 20, 2007

• A Technical Document section HA0075E was added.
  
• In the Selection Table and other related sections a 16NSOP new package was added.
  
• In the Pin Description section, the V_REF description was modified.
  
• In the A.C. Characteristics table, t_LVR was added.
  
• The Program Memory diagram has been modified.
  
• In the Reset section, the T_BLH entries in the register reset status table was modified.
  
• The Watchdog Timer diagram was modified.
  
• The Input/Output Ports diagram was modified.
  
• In the Reset and Initialisation section the Reset Circuit diagram was modified.
  
• In the Oscillator section, the System Crystal/Ceramic Oscillator was modified.
  
• The Application Circuit section was modified.

Revision # 1.00   This was posted on August 24, 2006