JEDEC Standard No. 204C
-i-
SERIAL INTERFACE FOR DATA CONVERTERS
CONTENTS
Foreword .................................................................................................................................................................... xii
1 Scope ............................................................................................................................................................... 1
2 Normative references .................................................................................................................................... 3
3 Terminology ................................................................................................................................................... 4
3.1 Terms and definitions ...................................................................................................................................... 4
3.2 Symbols and abbreviated terms ....................................................................................................................... 9
4 Introduction and common requirements .................................................................................................. 17
4.1 Application overview .................................................................................................................................... 17
4.1.1 Background ................................................................................................................................................... 17
4.1.2 Physical layer overview ................................................................................................................................. 18
4.1.3 Transport and link layer overview ................................................................................................................. 19
4.1.3.1 Data encoding and organization .................................................................................................................... 19
4.1.3.2 Clocking ........................................................................................................................................................ 19
4.1.3.3 Sync header stream ........................................................................................................................................ 21
4.1.3.4 Deterministic latency ..................................................................................................................................... 21
4.1.4 Data link properties ....................................................................................................................................... 21
4.1.4.1 Variants and modes ....................................................................................................................................... 22
4.1.5 Configuration examples ................................................................................................................................ 22
4.1.5.1 General .......................................................................................................................................................... 22
4.1.5.2 Single-device ADC application ..................................................................................................................... 22
4.1.5.3 Single-device DAC application ..................................................................................................................... 24
4.2 Deterministic latency ..................................................................................................................................... 25
4.2.1 Introduction and general requirements .......................................................................................................... 25
4.2.2 No support for deterministic latency (device subclass 0 and device subclass 1 using MULTIREF) ............ 28
4.2.3 Deterministic latency using SYSREF (device subclass 1) ............................................................................ 28
4.2.4 Deterministic latency using SYNC~ detection (device subclass 2) ............................................................... 28
4.3 Physical timing .............................................................................................................................................. 29
4.3.1 Device clock .................................................................................................................................................. 29
4.3.2 Link layer clock ............................................................................................................................................. 30
4.3.3 Transport layer clock ..................................................................................................................................... 30
4.3.4 Local multiframe and extended multiblock clocks (LMFC and LEMC) ...................................................... 31
4.3.5 SYSREF signal (device Subclass 1) .............................................................................................................. 31
4.3.6 MULTIREF signal (device subclass 1) ......................................................................................................... 33
4.3.7 SYNC~ generation and detection clocks (8B/10B link layer) ....................................................................... 35
4.3.8 Skew and latency variation budget ................................................................................................................ 36
4.4 Control interfaces .......................................................................................................................................... 47
4.5 Device classification ..................................................................................................................................... 47
4.5.1 Classes ........................................................................................................................................................... 47
4.5.2 Device subclassification ................................................................................................................................ 47
4.5.3 Features to be declared .................................................................................................................................. 48
5 Physical layer specification ......................................................................................................................... 49
5.1 Category B physical layer specification ........................................................................................................ 49
5.1.1 Electrical specification overview .................................................................................................................. 49
5.1.2 Compliance types .......................................................................................................................................... 50
5.1.3 Transmission medium ................................................................................................................................... 51
5.1.3.1 Transmission medium insertion loss ............................................................................................................. 52
5.1.4 Class B-3 ( LV-OIF-SxI5) ............................................................................................................................. 52
5.1.4.1 Compliance ................................................................................................................................................... 52
5.1.4.2 Transmitter .................................................................................................................................................... 53
5.1.4.3 Receiver ......................................................................................................................................................... 54
5.1.5 Class B-6 (LV-OIF-6G-SR) .......................................................................................................................... 56
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