SAA7370 datasheet(51/60 Pages) PHILIPS

Part #	SAA7370

Description	Digital servo processor and Compact Disc decoder CD7

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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51 / 60 page

1998 Feb 26

51

Philips Semiconductors

Product speciﬁcation

Digital servo processor and

Compact Disc decoder (CD7)

SAA7370

Notes

1. The 4-wire bus mode microprocessor interface timing for writing to registers 0 to F, and reading Q-channel subcode

and decoder status, is a function of the overspeed factor ‘n’. In the lock-to-disc mode the maximum data rate is lower.

2. Negative set-up time means that the data may change after clock transition.

WRITE MODE (CL = 20 pF)

tsD

set-up time SDA to SCL

0

−

0

−

ns

thD

hold time SCL to SDA

950

−

950

−

ns

tsCL

set-up time SCL to SILD

480

−

480

−

ns

thCL

hold time SILD to SCL

120

−

120

−

ns

tdPLP

delay between two SILD

pulses

70

−

70

−µs

tdWZ

delay time SDA

high-impedance to SILD

0

−

0

−

ns

SYMBOL

PARAMETER

CONDITIONS

NORMAL MODE

LOCK-TO-DISC MODE

UNIT

MIN.

MAX.

MIN.

MAX.

handbook, full pagewidth

tW(SBSY)

tW(SFSY)

tr

VDD – 0.8 V

tSFSYL

tSFSYH

Tcy(block)

tcy(frame)

tf

td(SFSY−RCK)

td(SFSY−SUB)

th(RCK−SUB)

td(RCK−SUB)

SBSY

SFSY

RCK

SUB

SFSY

(4-wire mode)

SFSY

(3-wire mode)

0.8 V

MBG414

Fig.31 Subcode interface timing diagram.

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