UPD23C32040AL datasheet(13/24 Pages) NEC

13 / 24 page

µµµµPD23C32040AL, 23C32080AL

Data Sheet M15772EJ3V0DS

Read Cycle Timing Chart 2 (Page Access Mode)

(Input)

/CE

(Input)

/OE or OE (Input)

tACC

Data Out

tCE

tOE

tPAC Note 5

O0 to O7,

O8 to O15 Note 4

(Input)

(Output)

Data Out

High-Z

tOH

tDF Note 3

A2 to A20

A3 to A20

Upper address Note 1

A–1 Note 2, A0, A1

A–1 Note 2, A0, A1, A2

Page address Note 1

Notes 1. The address differs depending on the product as follows.

Part Number

Upper address

Page address

µPD23C32040AL

A2 to A20

A–1, A0, A1

µPD23C32080AL

A3 to A20

A–1, A0, A1, A2

2. During WORD mode, A–1 is O15.

3. tDF is the time from inactivation of Chip Enable input (/CE) or Output Enable input (/OE or OE) to

high impedance state output.

4. During BYTE mode, O8 to O14 are high impedance and O15 is A–1.

5. The definition of page access time is as follows.

[

µµµµPD23C32040AL ]

Page access time

Upper address (A2 to A20)

/CE input condition

/OE or OE input condition

inputs condition

tPAC

Before tACC – tPAC

Before tCE – tPAC

Before stabilizing of page

address (A–1, A0, A1)

[

µµµµPD23C32080AL ]

Page access time

Upper address (A3 to A20)

/CE input condition

/OE or OE input condition

inputs condition

tPAC

Before tACC – tPAC

Before tCE – tPAC

Before stabilizing of page

address (A–1, A0, A1, A2)

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