ADSP-2104 datasheet(24/36 Pages) AD

24 / 36 page

ADSP-2104/ADSP-2109

–24–

REV. 0

20 MHz

Parameter

Min

Max

Unit

Timing Requirement:

tRDD

RD Low to Data Valid

tAA

A0–A13, PMS, DMS, BMS to Data Valid

19.5

tRDH

Data Hold from RD High

Switching Characteristic:

tRP

RD Pulse Width

tCRD

CLKOUT High to RD Low

7.5

22.5

tASR

A0–A13, PMS, DMS, BMS Setup before

2.5

RD Low

tRDA

A0–A13, PMS, DMS, BMS Hold after RD

3.5

Deasserted

tRWR

RD High to RD or WR Low

Frequency Dependency

(CLKIN

≤ 20 MHz)

Parameter

Min

Max

Unit

Timing Requirement:

tRDD

RD Low to Data Valid

0.5tCK – 13 + w

tAA

A0–A13, PMS, DMS, BMS to Data Valid

0.75tCK – 18 + w

tRDH

Data Hold from RD High

Switching Characteristic:

tRP

RD Pulse Width

0.5tCK – 8 + w

tCRD

CLKOUT High to RD Low

0.25tCK – 5

0.25tCK + 10

tASR

A0–A13, PMS, DMS, BMS Setup before

RD Low

0.25tCK – 10

tRDA

A0–A13, PMS, DMS, BMS Hold after RD

Deasserted

0.25tCK – 9

tRWR

RD High to RD or WR Low

0.5tCK – 5

NOTE

w = wait states

× t

CK.

TIMING PARAMETERS (ADSP-2104/ADSP-2109)

MEMORY READ

Figure 22. Memory Read

CLKOUT

A0 – A13

DMS, PMS

BMS

tRDH

tRWR

tRP

tASR

tCRD

tAA

tRDD

tRDA

ADSP-2104 Datasheet(PDF) 24 Page - Analog Devices

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