ADSP-2173 datasheet(27/52 Pages) AD

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ADSP-2171/ADSP-2172/ADSP-2173

REV. A

–27–

ADSP-2171/ADSP-2172

Parameter

Min

Max

Unit

Host Interface Port

Multiplexed Data and Address (HMD1 = 1)

Read Strobe and Write Strobe (HMD0 = 0)

Timing Requirement:

tHALP

ALE Pulse Width

tHASU

HAD15–0 Address Setup, before ALE Low

tHAH

HAD15–0 Address Hold after ALE Low

tHALS

Start of Write or Read after ALE Low

1, 2

tHDSU

HAD15–0 Data Setup before End of Write

5ns

tHWDH

HAD15–0 Data Hold after End of Write

3ns

tHRWP

Read or Write Pulse Width

Switching Characteristic:

tHSHK

HACK

Low after Start of Write or Read

1, 2

015

tHKH

HACK

Hold after End of Write or Read

3, 5

015

tHDE

HAD15–0 Data Enabled after Start of Read

0ns

tHDD

HAD15–0 Data Valid after Start of Read

tHRDH

HAD15–0 Data Hold after End of Read

tHRDD

HAD15–0 Data Disabled after End of Read

7ns

NOTES

1Start of Write = HWR Low and HSEL Low.

2Start of Read = HRD Low and HSEL Low.

3End of Write = HWR High or HSEL High.

4Read Pulse Width = HRD Low and HSEL Low, Write Pulse Width = HWR Low and HSEL Low.

5End of Read = HRD High or HSEL High.

ADDRESS

HDSU

DATA

HACK

HWR

HSEL

HD15–0

HRWP

HSHK

ALE

HALP

HALS

HKH

HAH

HASU

HWDH

HRDH

HRDD

HDE

ADDRESS

DATA

HACK

HRD

HSEL

HAD15–0

HRWP

HSHK

ALE

HALP

HALS

HKH

HAH

HASU

HDD

Figure 16. Host Interface Port (HMD1 = 1, HMD0 = 0)

Host Write Cycle

Host Read Cycle

ADSP-2173 Datasheet(PDF) 27 Page - Analog Devices

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