ADSP-2187NBCA-320 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADSP-2187NBCA-320

DSP Microcomputer

Analog Devices 

ADSP-218xN Series

Memory Read

Table 18. Memory Read

Parameter

Timing Requirements:

tRDD

RD Low to Data Valid1

tAA

A13–0, xMS to Data Valid2

tRDH

Data Hold from RD High

Switching Characteristics:

tRP

RD pulsewidth

tCRD

CLKOUT High to RD Low

tASR

A13–0, xMS Setup before RD Low

tRDA

A13–0, xMS Hold after RD Deasserted

tRWR

RD High to RD or WR Low

1w = wait states x tCK.

2xMS = PMS, DMS, CMS, IOMS, BMS.

Min

Max

Unit

0.5tCK – 5 + w ns

0.75tCK – 6 + w ns

0

ns

0.5tCK – 3 + w

ns

0.25tCK – 2

0.25tCK + 4

ns

0.25tCK – 3

ns

0.25tCK – 3

ns

0.5tCK – 3

ns

CLKOUT

A0–A13

DMS, PMS,

BMS, IOMS,

CMS

RD

D0–D23

WR

tASR

tCRD

tRP

tRDD

tAA

tRDA

tRWR

tRDH

Figure 27. Memory Read

–30–

REV. 0

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