UPD70741 datasheet(5/112 Pages) NEC

5 / 112 page

µPD70741

CONTENTS

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

1.1

Port Pins .........................................................................................................................................

1.2

Non-Port Pins .................................................................................................................................

1.3

Pin I/O Circuits and Processing of Unused Pins ......................................................................

INTERNAL UNITS ......................................................................................................................

2.1

Bus Interface Unit (BIU) ................................................................................................................

2.2

Wait Control Unit (WCU) ...............................................................................................................

2.3

DRAM Controller (DRAMC) ...........................................................................................................

2.4

ROM Controller (ROMC) ................................................................................................................

2.5

Interrupt Controller ........................................................................................................................

2.6

DMA Controller (DMAC) ................................................................................................................

2.7

Serial Interfaces (UART/CSI) ........................................................................................................

2.8

Real-Time Pulse Unit (RPU) .........................................................................................................

2.9

Watchdog Timer (WDT) .................................................................................................................

2.10

Clock Generator (CG) ....................................................................................................................

2.11

Bus Arbitration Unit (BAU) ...........................................................................................................

2.12

Port ..................................................................................................................................................

CPU FUNCTIONS .......................................................................................................................

3.1

Features ..........................................................................................................................................

3.2

Address Space ...............................................................................................................................

3.2.1

Memory map ...................................................................................................................

3.2.2

I/O map ............................................................................................................................

3.3

CPU Register Set ...........................................................................................................................

3.3.1

Program register set .....................................................................................................

3.3.2

System register set ........................................................................................................

3.4

Built-in Peripheral I/O Registers ..................................................................................................

3.5

Data Types ......................................................................................................................................

3.5.1

Data types .......................................................................................................................

3.5.2

Data alignment ...............................................................................................................

3.6

Cache ...............................................................................................................................................

INTERRUPT/EXCEPTION HANDLING FUNCTIONS ...............................................................

4.1

Features ..........................................................................................................................................

WAIT CONTROL FUNCTIONS ..................................................................................................

5.1

Features ..........................................................................................................................................

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