IBM EM78P447N User Manuals

Table of Contents

• GENERAL DESCRIPTION

  1
• FEATURES

  1
• PIN ASSIGNMENT

  3
• FUNCTION DESCRIPTION

  6
• Operational Registers

  7
• R0 (Indirect Addressing Register)

  7
• R1 (Time Clock /Counter)

  7
• R2 (Program Counter) & Stack

  7
• R3 (Status Register)

  10
• R4 (RAM Select Register)

  10
• R5~R7 (Port 5 ~ Port7)

  10
• R8~R1F and R20~R3E (General Purpose Register)

  10
• R3F (Interrupt Status Register)

  11
• Special Purpose Registers

  11
• A (Accumulator)

  11
• CONT (Control Register)

  11
• IOC5 ~ IOC7 (I/O Port Control Register)

  12
• IOCB (Wake-up Control Register for Port6)

  12
• IOCE (WDT Control Register)

  13
• IOCF (Interrupt Mask Register)

  14
• TCC/WDT & Prescaler

  15
• I/O Ports

  16
• RESET and Wake-up

  17
• RESET

  17
• The Status of RST, T, and P of STATUS Register

  21
• Interrupt

  22
• Oscillator

  23
• Oscillator Modes

  23
• Crystal Oscillator/Ceramic Resonators(XTAL)

  24
• External RC Oscillator Mode

  25
• CODE Option Register

  26
• Code Option Register (Word 0)

  26
• Customer ID Register (Word 1)

  28
• Power On Considerations

  28
• 4.10 External Power On Reset Circuit

  28
• 4.11 Residue-Voltage Protection

  29
• 4.12 Instruction Set

  30
• 4.13 Timing Diagram

  33
• ABSOLUTE MAXIMUM RATINGS

  34
• DC ELECTRICAL CHARACTERISTICS

  34
• DC Electrical Characteristic

  34
• AC Electrical Characteristic

  35
• Device Characteristic

  36
• Package Types

  50
• Package Information

  50