UPD63 datasheet(4/68 Pages) NEC

4 / 68 page

µPD63, 63A, 64

TABLE OF CONTENTS

PIN FUNCTIONS .........................................................................................................................

1.1

List of Pin Functions .........................................................................................................................

1.2

INPUT/OUTPUT Circuits of Pins ......................................................................................................

1.3

Dealing with Unused Pins ................................................................................................................

INTERNAL CPU FUNCTIONS ....................................................................................................

2.1

Program Counter (PC) ......................................................................................................................

2.2

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

2.3

Address Stack Register (ASR (RF)) .................................................................................................

2.4

Program Memory (ROM) ................................................................................................................... 10

2.5

Data Memory (RAM) .......................................................................................................................... 10

2.6

Data Pointer (DP) ............................................................................................................................... 11

2.7

Accumulator (A) ................................................................................................................................ 11

2.8

Arithmetic and Logic Unit (ALU) ...................................................................................................... 12

2.9

Flags ................................................................................................................................................... 12

2.9.1

Status flag (F) .......................................................................................................................... 12

2.9.2

Carry flag (CY) ........................................................................................................................ 13

PORT REGISTERS (PX) ............................................................................................................. 14

3.1

KI/O Port (P0) .......................................................................................................................................

3.2

KI Port/Special Ports (P1) ................................................................................................................. 16

3.2.1

KI port (P11: bits 4-7 of P1) ...................................................................................................... 16

3.2.2

S0 port (P1’s bit 2) ................................................................................................................... 16

3.2.3

S1/LED (port bit 3 of p1) .......................................................................................................... 16

3.3

Control Register 0 (P3) .....................................................................................................................

3.4

Control Register 1 (P4) .....................................................................................................................

TIMER ......................................................................................................................................... 19

4.1

Timer Configuration ..........................................................................................................................

4.2

Timer Operation .................................................................................................................................

4.3

Carrier Output .................................................................................................................................... 21

4.4

Software Control of Timer Output ...................................................................................................

STANDBY FUNCTION ................................................................................................................ 22

5.1

Outline of Standby Function ............................................................................................................ 22

5.2

Standby Mode Setup and Release ...................................................................................................

5.3

Standby Mode Release Timing ........................................................................................................

RESET PIN .................................................................................................................................. 26

POC CIRCUIT (MASK OPTION) ................................................................................................ 27

7.1

Functions of POC Circuit .................................................................................................................. 28

7.2

Oscillation Check at Low Supply Voltage .......................................................................................

SYSTEM CLOCK OSCILLATION CIRCUIT ............................................................................... 29

UPD63 Datasheet(PDF) 4 Page - NEC

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