PSD311 datasheet(2/85 Pages) STMICROELECTRONICS

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PSD3XX Family

PSD3XX

ZPSD3XX

ZPSD3XXV

PSD3XXR

ZPSD3XXR

ZPSD3XXRV

Low Cost Microcontroller Peripherals

Table of Contents

Introduction ...........................................................................................................................................................1

Notation ................................................................................................................................................................2

Key Features ........................................................................................................................................................4

PSD3XX Family Feature Summary ......................................................................................................................5

Partial Listing of Microcontrollers Supported ........................................................................................................6

Applications ..........................................................................................................................................................6

ZPSD Background ................................................................................................................................................6

7.1

Integrated Power ManagementTM Operation .............................................................................................7

Operating Modes (MCU Configurations) ............................................................................................................10

Programmable Address Decoder (PAD).............................................................................................................12

I/O Port Functions ...............................................................................................................................................15

10.1

CSIOPORT Registers..............................................................................................................................15

10.2

Port A (PA0-PA7).....................................................................................................................................16

10.2.1 Port A (PA0-PA7) in Multiplexed Address/Data Mode................................................................16

10.2.2 Port A (PA0-PA7) in Non-Multiplexed Address/Data Mode ........................................................17

10.3

Port B (PB0-PB7).....................................................................................................................................18

10.3.1 Port B (PA0-PA7) in Multiplexed Address/Data Mode................................................................18

10.3.2 Port B (PA0-PA7) in Non-Multiplexed Address/Data Mode ........................................................19

10.4

Port C (PC0-PC2) ....................................................................................................................................20

10.5

ALE/AS Input Pin .....................................................................................................................................20

PSD Memory ......................................................................................................................................................21

11.1

EPROM....................................................................................................................................................21

11.2

SRAM (Optional)......................................................................................................................................21

11.3

Page Register (Optional) .........................................................................................................................21

11.4

Programming and Erasure.......................................................................................................................21

Control Signals ...................................................................................................................................................22

12.1

ALE or AS ................................................................................................................................................22

12.2

WR or R/W...............................................................................................................................................22

12.3

RD/E/DS (DS option not available on 3X1 devices) ................................................................................22

12.4

PSEN or PSEN ........................................................................................................................................22

12.5

A19/CSI ...................................................................................................................................................23

12.6

Reset Input ..............................................................................................................................................24

Program/Data Space and the 8031 ....................................................................................................................26

Systems Applications..........................................................................................................................................27

Security Mode .....................................................................................................................................................30

Power Management............................................................................................................................................30

16.1

CSI Input..................................................................................................................................................30

16.2

CMiser Bit ................................................................................................................................................30

16.3

Turbo Bit (ZPSD Only).............................................................................................................................31

16.4

Number of Product Terms in the PAD Logic............................................................................................31

16.5

Composite Frequency of the Input Signals to the PAD Logic..................................................................32

16.6

Loading on I/O Pins .................................................................................................................................33

Calculating Power ...............................................................................................................................................34

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