SAA2521 datasheet(21/28 Pages) PHILIPS

Part #	SAA2521

Description	Masking threshold processor for MPEG layer 1 audio compression applications

PDF	28 Pages

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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21 / 28 page

August 1993

Philips Semiconductors

Preliminary speciﬁcation

Masking threshold processor for MPEG

layer 1 audio compression applications

SAA2521

tw2 > 550 ns

minimum time between two 8-bit transfers

MBC137

LTENA

LTCNT0/1

LTCLK

LTENA must remain HIGH

Fig.18 16-bit transfers.

MBC138 - 2

LTENC

LTCLKC

LTDATAC

bit :

t Le

t su1

t su4

t h2

t cH

t cL

t su2

su3

LTCNT0(C)/1(C)

Fig.19 SAA2521 to SAA2520 timing.

tle

400 ns minimum LOW time LTENA prior to transfer

ts1

400 ns set-up time LTCNT0, 1C before LTENC HIGH

ts2

200 ns set-up time LTENC before LTCLKC LOW

th2

400 ns hold time LTENC after LTCLK HIGH

tlc

210 ns minimum LOW time LTCLKC

thc

210 ns minimum HIGH time LTCLKC

ts3

210 ns set-up time LTDATAC before LTCLKC HIGH

th3

160 ns hold time LTDATAC after LTCLKC HIGH

ts4

900 ns set-up time LTCLKC before LTENC HIGH

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