HT48R30A-1/HT48C30-1 Revision # 2.00 I/O Type 8-bit MCU Modifications made on April 24, 2009 The Indirect Addressing Register section was modified. Revision # 1.91 Modifications made on January 9, 2009 The Instruction Set section was modified. The Instruction Definition section was modified. The Package Information section was modified. The Product Tape and Reel Specifications section was modified. Revision # 1.90 The Pad Assignment section was deleted. Revision # 1.80 Modifications made on May 30, 2005 Technical Document section was added. Revision # 1.70 Modifications made on November 4, 2005 Modifications made on September 21, 2004 At the D.C. Characteristics table, the IDD3 Parameter, as well as Typ. and Max. Conditions were modified. Revision # 1.60 Modifications made on June 9, 2004 At the table below the Application Circuits section, the entries of the column for Crystal or Resonator were modified. A brief functional description for R1 was added at the bottom portion of the table. Revision # 1.50 Modifications made on April 26, 2004 The Product Title was modified from 8-Bit I/O Type MCU to I/O Type 8-Bit MCU. At the D.C. Characteristics table, the Min. value for the RPH 3V was changed from 40kto 20k and the Max. value from 80k to 100k Revision # 1.40 Modifications made on February 11, 2004 The Block Diagram was modified. At LVR section, the VLVR values were changed from 3.3V to 3.0V for VDD and from 2.4V to 2.2V for VOPR. Revision # 1.31 Modifications made on December 16, 2003 At the Instruction Set Summary and Instruction Definition sections, the missing TABRDL [m] instructions were added back. Revision # 1.30 Modifications made on August 25, 2003 The PD flag label was changed to PDF flag. The Application Circuits were modified. o The recommended RESET circuitry was modified. For reasons of stability and noise immunity, the 2-resistor/2-capacitor or 2-resistor/1-capacitor recommended circuits are an improvement over the 1-resistor/1-capacitor circuit. The choice of which circuit is used depends upon the user application. For example, for battery powered applications the single resistor and single capacitor circuit may be adequate whereas for applications such as home appliances, industrial control applications or for circuits which are close to electrical noise sources, the 2-resistor/2-capacitor circuit may be the better choice. o The Crystal OSC application circuitry was also modified The recommended additional resistor has been added to ensure that the oscillator will cease to function when the supply voltage falls below 2.2V to prevent microcontroller malfunctions. This is because of instabilities in the oscillator at supply voltages of less than 2.2V. o The Instruction Definition section was modified, with the first two columns deleted. Revision # 1.20 Modifications made on May 12, 2003 The TMR entries on the table for the Reset register status were modified. Revision # 1.10 Modifications made on January 17, 2003 The system clock label on the block diagram was modified. At the Oscillator section and other related sections, the WDT period was changed from 78µ s to 65µ s/5V. At the Watchdog Timer section and other related section, the nominal time-out period was changed from 16.6ms/5V to 17ms/5V. Revision # 1.00 This was posted on January 2, 2003 HT48R30A-1 and HT48C30-1 datasheets were combined. Revision number restarted from 1.00.