ZPSD302B-90JI View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ZPSD302B-90JI

Low cost field programmable microcontroller peripherals

STMicroelectronics 

PSD3XX Family

Figure 21. Timing of 8-Bit Multiplexed Address/Data Bus Using RD, WR (PSD3X2/3X3)

CSI/A19

as CSI

Direct (1)

PAD Input

READ CYCLE

32

7

STABLE INPUT

6

WRITE CYCLE

32

15

32

STABLE INPUT

14

Multiplexed (2)

Inputs

6

10

14

DATA

IN

A0/AD0-

A7/AD7

ADDRESS A

DATA VALID

ADDRESS B

2

3

Active High

) ALE

1

ct(s Active Low

u ALE

Prod RD/E/DS as RD

lete BHE/PSEN

so as PSEN

Ob WR/VPP or

- RW as WR

t(s) Any of

PA0-PA7

c as I/O Pin

du Any of

ro PB0-PB7

P as I/O Pin

te Any of

le PA0-PA7 Pins

as Address

ObsoOutputs

5

23

4

8

12

9

2

1

13

18

19

INPUT

INPUT

23

ADDRESS A

3

17

16

11

36

13

12A

20

ADDRESS B

OUTPUT

OUTPUT

See referenced notes on page 64

45

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