S5H1420 Datasheet, PDF (2/31 Pages) Samsung semiconductor – Channel Decoder for DVB-S/DSS

S5H1420
DBS Channel Decoder for DVB-S/DSS
TABLE OF CONTENTS
page
1. INTRODUCTION...……………………………………………………………………………………3
1.1 Overview ………………………………………………………………...………………….………….3
1.2 Features…………………………………………………………………………………………………..3
1.3 Applications………………………………………………………………………………………………3
1.4 Ordering Information………………………………………………………………………………………3
1.5 Functional bock diagram ……………………………………………………………………………….4
2. IN INFORMATION...……………………………………………………………………………………4
2.1 Pin assignment……………………………………………………………………………………………4
2.2 Pin description……………………………………………………………………………………………5
3. FUNCTIONAL DESCRIPTION ...……………………………………………………………………………6
3.1 Signal processing ……………………………………………………………………………………...6
3.1.1 I & Q inputs ……………………………………………………………………………………6
3.1.2 PRE – AGC…………………………………………………………………………………………6
3.1.3 Root raised cosine and rate conversion filter …………………………………………………6
3.1.3 Offset cancellation ...……………………………………………………………………………….6
3.1.4 POST – AGC ........…………………………………………………………………………………6
3.2 Timing recovery.………………………………………………………………………………………..6
3.2.1 Timing control……………………………………………………………………………………...6
3.2.2 Loop equation……………………………………………………………………………………. 7
3.2.3 Timing lock indicator… …………………………………………...……………………………….7
3.3 Carrier recovery and derotator loop ………………………………………………………………….7
3.3.1 Loop equation ……………………………………………………………………………………7
3.3.2 Carrier lock detector……………………………………………………………………………….8
3.3.3 Derotator frequency………………………………………………………………………………..8
3.3.4 Automatic frequency detector…………………………………………………………………….8
3.3.5 False lock……………………………………………………………………………………………8
3.4 Forward error correction………………………………………………………………………………8
3.4.1 FEC modes………………………………………………………………………………………..8
3.4.2 Soft decision………………………………………………………………………………………8
3.4.3 Viterbi decoder and synchronization……………………………………………………………8
3.4.4 Synchronization…………………………………………………………………………………...9
3.4.5 Error monitoring…………………………………………………………………………………..9
3.4.6 Convolutional deinterleaver………………………………………………………………………9
3.4.7 Reed-Solomon decoder and descramble………………………………………………………9
3.4.8 Spectrum Inverse of Code Rate 5/6……………..………………………………………………10
3.4.9 MPEG interface……………………………………………………………………………………10
3.4.9.1 Parallel output interface……………………………………………………………………10
3.4.9.2 Serial output interface………………………………………………………………………10
3.4.9.3 MPEG Clock Control ………………………………………………………………………12
3.5 Front end interface……………………………………………………………………………13
3.5.1 I²C interface……………………………………………………………………………………….13
3.5.2 Write operation (Normal Mode)…………………………………………………………………13
3.5.3 Read operation (Normal Mode)…………………………………………………………………13
3.5.4 Identification register……………………………………………………………………………..13
3.5.5 Sampling frequency………………………………………………………………………………13
3.5.6 Clock generation………………………………………………………………………………….13
3.5.7 I²C Bus repeater…………………………………………………………………………………..14
3.5.8 DiSEqC interface…………………………………………………………………………………14
4. REGISTER LIST……………………………………………………………………………………………..16
5. ELECTRICAL CHARACTERISTICS………………………………………………………………………26
5.1 Absolute maximum ratings…………………………………………………………………………….26
5.2 Recommended operating conditions…………………………………………………………………26
5.3 DC electrical characteristics…………………………………………………………………………..26
5.4 A/D converter……………………………………………………………………………………………26
5.5 Timing characteristics………………………………………………………………………………….27
5.6 I²C Bus characteristics…………………………………………………………………………………28
6. APPLICATION EXAMPLES………………………………………………………………………………..29
6.1 Application examples with DVB-S Tuner……………………………………………………………29
7. PACKAGE DIMENSION…………………………………………………………………………………….30
8. Data Sheet Update History…………………………………………………………………………...…….31
Samsung Electronics Co, Ltd. Proprietary Information
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