SAA7207H データシートの表示（PDF） - Philips Electronics

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SAA7207H

Reed Solomon decoder IC

Philips Electronics 

Philips Semiconductors

Reed Solomon decoder IC

Product specification

SAA7207H

Table 5 Read (R/W = 1)

BYTE

1st byte

2nd byte

3rd byte

4th byte

LOGIC LEVEL

0

0

S(2)

−

−

−

−

−

Notes

1. Input data bits for Port 5 to Port 0.

2. When S = 0 it is in sync status; when S = 1 it is in no sync status.

DESCRIPTION

input data Port 5 to Port 0(1)

bits 22 to 16 of CorrCount

bits 15 to 8 of CorrCount

bits 7 to 0 of CorrCount

The CorrCount is an estimation for the Byte Error Rate (BER) of the channel. This estimation is good for a high

signal-to-noise ratio (SNR); then all uncorrected blocks will not have more than 9 errors. The CorrCount is incremented

by 1 for each corrected byte. Each uncorrectable or unsychronized block will increment the CorrCount by 9. The

CorrCount will saturate at ‘7FFFFFH’ so that value actually means ‘counter overflow’.

A CorrCount reset is caused by the following:

• A hardware or software reset

• Reading the 4th byte.

book, full pagewidth

CLK

DATA1

DATA0

VALI

Tsymbol

SLOT 0

SLOT 1

SLOT 2

SLOT 3

SLOT 4

MBH318

Fig.3 Input Interface.

1996 Jul 17

9

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