CHAPTER 4. INTERNAL CPU FUNCTIONS

31

4.1

PROGRAM COUNTER (PC)

31

4.2

PROGRAM MEMORY (ROM)

32

4.3

DATA MEMORY (RAM)

33

4.4

GENERAL REGISTER

35

4.5

ACCUMULATOR

36

4.6

STACK POINTER (SP)

37

4.7

PROGRAM STATUS WORD (PSW)

39

CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS

41

5.1

DIGITAL INPUT/OUTPUT PORTS

41

 

5.1.1

Digital Input/Output Port Types, Characteristics and Configuration

42

 

5.1.2

Input/Output Mode Setting

46

 

5.1.3

Digital Input/Output Port Handling Instructions

47

 

5.1.4

Digital Input/Output Port Operations

49

 

5.1.5

Internal Pull-Up Resistors

51

 

5.1.6

Digital Input/Output Port Input/Output Timing

53

5.2

CLOCK GENERATION CIRCUIT

54

 

5.2.1

Clock Generation Circuit Configuration

54

 

5.2.2

Clock Generation Circuit Function and Operation

55

 

5.2.3

CPU Clock Setting

59

 

5.2.4

Differences Between μPD75402A and μPD75402

61

5.3

CLOCK OUTPUT CIRCUIT

63

 

5.3.1

Clock Output Circuit Configuration

63

 

5.3.2

Clock Output Mode Register (CLOM)

64

 

5.3.3

Clock Output Procedure

65

 

5.3.4

Example of Remote Control Application

65

5.4

BASIC INTERVAL TIMER

66

 

5.4.1

Basic Interval Timer Configuration

66

 

5.4.2

Basic Interval Timer Mode register (BTM)

67

 

5.4.3

Basic Interval Timer Operation

68

 

5.4.4

Examples of Basic Interval Timer Applications

69

5.5

SERIAL INTERFACE

70

 

5.5.1

Serial Interface Functions

70

 

5.5.2

Serial Interface Configuration

71

 

5.5.3

Register Functions

74

 

5.5.4

Operation-Halt Mode

83

 

5.5.5

3-Wire Serial I/O Mode Operation

84

 

5.5.6

SBI Mode Operation

93

CHAPTER 6. INTERRUPT FUNCTIONS

126

6.1

INTERRUPT CONTROL CIRCUIT CONFIGURATION

126

6.2

INTERRUPT SOURCE TYPES AND VECTOR TABLE

128

6.3

INTERRUPT CONTROL CIRCUIT HARDWARE

129

6.4

INTERRUPT SEQUENCE

134

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NEC PD75402A, PD75P402 Digital INPUT/OUTPUT Ports, Clock Generation Circuit, Clock Output Circuit, Basic Interval Timer