UPD70741 datasheet(82/112 Pages) NEC

82 / 112 page

µPD70741

(d) Read timing (high-speed page access: on-page) (1/2)

Parameter

Symbol

Conditions

MIN.

MAX.

Unit

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

CAS access time

tCAC

(w + 1)T - 20

Access time from column address

tAA

(w + 1)T - 3

Output enable access time

tOEA

1.5T - 20

Output buffer turn-off delay (relative to CAS)

tOFF

0ns

Output buffer turn-off delay (relative to MRD)

tOEZ

0ns

RD setup time (relative to RAS

↑)

tOES

1.5T

RAS hold width (read)

tRSH

(w + 1.5)T - 20

CAS pulse width (read)

tCAS

(w + 1)T - 15

CAS precharge time

tCP

0.5T - 10

Column address setup time (read)

tASC

0.5T - 15

Column address hold time (read)

tCAH

(w + 1)T - 15

Cycle time in high-speed page mode

tPC

1.5T - 10

Access time from CAS precharge

tACP

2T - 20

RAS hold time relative to CAS precharge

tRHCP

Read command setup time

tRCS

0.5T

Read command hold time

tRCH

0.5T - 15

Remark T: tCYK

w: 0

UPD70741 Datasheet(PDF) 82 Page - NEC

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