UPD17072 datasheet(8/226 Pages) NEC

8 / 226 page

µPD17072,17073

CONTENTS

PIN FUNCTION .................................................................................................................................. 12

1.1

Pin Function List ...................................................................................................................................... 12

1.2

Equivalent Circuits of Pins ....................................................................................................................... 15

1.3

Processing of Unused Pins ..................................................................................................................... 18

1.4

Notes on Using CE Pin ............................................................................................................................ 19

PROGRAM MEMORY (ROM) ........................................................................................................... 20

2.1

General ..................................................................................................................................................... 20

2.2

Program Memory ..................................................................................................................................... 21

2.3

Program Counter ...................................................................................................................................... 21

2.4

Execution Flow of Program Memory ....................................................................................................... 22

2.5

Notes on Using Program Memory ........................................................................................................... 22

ADDRESS STACK (ASK) ................................................................................................................. 23

3.1

General ..................................................................................................................................................... 23

3.2

Address Stack Register (ASR) ................................................................................................................ 23

3.3

Stack Pointer (SP) ................................................................................................................................... 24

3.4

Operations of Address Stack ................................................................................................................... 25

3.5

Notes on Using Address Stack ................................................................................................................ 25

DATA MEMORY (RAM) ..................................................................................................................... 26

4.1

General ..................................................................................................................................................... 26

4.2

Configuration and Function of Data Memory .......................................................................................... 27

4.3

Addressing Data Memory ........................................................................................................................ 30

4.4

Notes on Using Data Memory ................................................................................................................. 31

SYSTEM REGISTER (SYSREG) ...................................................................................................... 32

5.1

General ..................................................................................................................................................... 32

5.2

Address Register (AR) ............................................................................................................................. 33

5.3

Bank Register (BANK) ............................................................................................................................. 35

5.4

Program Status Word (PSWORD) .......................................................................................................... 36

5.5

Notes on Using System Register ............................................................................................................ 37

GENERAL REGISTERS (GR) ........................................................................................................... 38

6.1

Outline of General Registers ................................................................................................................... 38

6.2

Address Creation of General Register with Each Instruction ................................................................ 39

6.3

Notes on Using General Register ........................................................................................................... 39

7. ALU (ARITHMETIC LOGIC UNIT) BLOCK ....................................................................................... 40

7.1

General ..................................................................................................................................................... 40

7.2

Configuration and Function of Each Block ............................................................................................. 41

7.3

ALU Processing Instructions ................................................................................................................... 41

7.4

Notes on Using ALU ................................................................................................................................44

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