UPD784021 datasheet(4/90 Pages) NEC

4 / 90 page

mPD784020, 784021

CONTENTS

DIFFERENCES BETWEEN

mPD784026 SUB-SERIES ...........................................................

MAIN DIFFERENCES BETWEEN

mPD784026 AND m

mPD78234 SUB-SERIES .....................

PIN CONFIGURATION (TOP VIEW) ........................................................................................

SYSTEM CONFIGURATION EXAMPLE (PPC) .......................................................................

BLOCK DIAGRAM .....................................................................................................................

LIST OF PIN FUNCTIONS ........................................................................................................

6.1

PORT PINS ......................................................................................................................................

6.2

NON-PORT PINS ............................................................................................................................

6.3

I/O CIRCUITS FOR PINS AND HANDLING OF UNUSED PINS .................................................

CPU ARCHITECTURE ..............................................................................................................

7.1

MEMORY SPACE ...........................................................................................................................

7.2

CPU REGISTERS ............................................................................................................................

7.2.1

General-Purpose Registers ..........................................................................................

7.2.2

Control Registers ...........................................................................................................

7.2.3

Special Function Registers (SFRs) .............................................................................

PERIPHERAL HARDWARE FUNCTIONS ...............................................................................

8.1

PORTS .............................................................................................................................................

8.2

CLOCK GENERATOR ....................................................................................................................

8.3

REAL-TIME OUTPUT PORT ..........................................................................................................

8.4

TIMERS/COUNTERS ......................................................................................................................

8.5

PWM OUTPUT (PWM0, PWM1) .....................................................................................................

8.6

A/D CONVERTER ...........................................................................................................................

8.7

D/A CONVERTER ...........................................................................................................................

8.8

SERIAL INTERFACE ......................................................................................................................

8.8.1

Asynchronous Serial Interface/Three-Wire Serial I/O (UART/IOE) .........................

8.8.2

Synchronous Serial Interface (CSI) .............................................................................

8.9

EDGE DETECTION FUNCTION .....................................................................................................

8.10

WATCHDOG TIMER .......................................................................................................................

INTERRUPT FUNCTION ...........................................................................................................

9.1

INTERRUPT SOURCE ....................................................................................................................

9.2

VECTORED INTERRUPT ...............................................................................................................

9.3

CONTEXT SWITCHING ..................................................................................................................

9.4

MACRO SERVICE ...........................................................................................................................

9.5

EXAMPLES OF MACRO SERVICE APPLICATIONS ..................................................................

UPD784021 Datasheet(PDF) 4 Page - NEC

UPD784021 Datasheet(HTML) 4 Page - NEC

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