i

PSD211R Family

PSD211R

ZPSD211R

ZPSD211RV

Low Cost Microcontroller Peripherals

Table of Contents

1

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

2

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

3

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

4

PSD211R Family Feature Summary ....................................................................................................................5

5

Partial Listing of Microcontrollers Supported ........................................................................................................5

6

Applications ..........................................................................................................................................................5

7

ZPSD Background ................................................................................................................................................5

7.1

8

Operating Mode ....................................................................................................................................................9

9

Programmable Address Decoder (PAD)...............................................................................................................9

10

I/O Port Functions ...............................................................................................................................................12

10.1

CSIOPORT Registers..............................................................................................................................12

10.2

Port A (PA0-PA7).....................................................................................................................................12

10.3

Port B (PB0-PB7).....................................................................................................................................14

10.4

Port C (PC0-PC2) ....................................................................................................................................15

11

PSD Memory ......................................................................................................................................................16

11.1

EPROM....................................................................................................................................................16

11.2

Programming and Erasure.......................................................................................................................16

12

Control Signals ...................................................................................................................................................16

12.1

ALE or AS ................................................................................................................................................17

12.2

WR or R/W...............................................................................................................................................17

12.3

RD/E ........................................................................................................................................................17

12.4

PSEN .......................................................................................................................................................17

12.5

A19/CSI ...................................................................................................................................................17

12.6

Reset Input ..............................................................................................................................................18

13

Program/Data Space and the 8031 ....................................................................................................................20

14

Systems Applications..........................................................................................................................................21

15

Security Mode .....................................................................................................................................................23

16

Power Management............................................................................................................................................23

16.1

CSI Input..................................................................................................................................................23

16.2

CMiser Bit ................................................................................................................................................23

16.3

Turbo Bit (ZPSD Only).............................................................................................................................24

16.4

Number of Product Terms in the PAD Logic............................................................................................24

16.5

Composite Frequency of the Input Signals to the PAD Logic..................................................................25

16.6

Loading on I/O Pins .................................................................................................................................26

17

Calculating Power ...............................................................................................................................................27

18

Specifications......................................................................................................................................................30

18.1

Absolute Maximum Ratings .....................................................................................................................30

18.2

Operating RAnge .....................................................................................................................................30

18.3

Recommended Operating Conditions......................................................................................................30

18.4

Pin Capacitance.......................................................................................................................................30

18.5

AC/DC Characteristics – PSD211R/ZPSD211R (All 5 V devices)...........................................................31

18.6

AC/DC Characteristics – PSD211RV (3 V devices only).........................................................................32

18.7

Timing Parameters – PSD211R/ZPSD211R (All 5 V devices) ................................................................33

18.8

Timing Parameters – ZPSD211RV (3 V devices only) ............................................................................34

18.9

Timing Diagrams for PSD211R Parts .....................................................................................................36

18.10 AC Testing ...............................................................................................................................................39