UPD70741 datasheet(72/112 Pages) NEC

72 / 112 page

µPD70741

(b) Read timing (1/2)

Parameter

Symbol

Conditions

MIN.

MAX.

Unit

Read cycle time

tRC

(n + 2)T - 10

Address access time

tAA

(n + 2)T - 25

Hold time from address to data input

tADH

0ns

CSn access time

tCSA

(n + 2)T - 25

Hold time from CSn to data input

tCDH

0ns

Delay from CSn

↑ to write data output (ADC = 0)

tDCD0

0.5T - 10

Delay from CSn

↑ to write data output (ADC = 1)

tDCD1

1T - 10

RD access time

tRDA

(n + 1.5)T - 25

Hold time from RD to data input

tRDH

0ns

RD pulse width

tRDP

(n + 1.5)T - 7

RD high-level width

tRDRDH

0.5T - 10

Delay from RD

↑ to write data output (ADC = 0)

tDRD0

0.5T - 10

Delay from RD

↑ to write data output (ADC = 1)

tDRD1

1T - 10

Address valid time prior to RD

tARS

0.5T - 7

CSn valid time prior to RD

tCRS

0.5T - 7

Remark T: tCYK

n : Wait state count

UPD70741 Datasheet(PDF) 72 Page - NEC

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