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ADC12J1600 Datasheet(PDF) 54 Page - Texas Instruments |
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ADC12J1600 Datasheet(HTML) 54 Page - Texas Instruments |
54 / 98 page ![]() ADC12J1600, ADC12J2700 SLAS969C – JANUARY 2014 – REVISED JULY 2015 www.ti.com The long-transport test mode is available in all DDC modes (decimation > 1). Patterns are generated in accordance with the JESD204B standard and are different for each output format. Table 38 lists one example of the long transport test pattern: Table 38. Long Transport Test Pattern - Decimate-by-4, DDR = 1, P54 = 1, K=10 TIME → CHAR 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 NO. Lane 0 0x0003 0x0002 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x0003 Lane 1 0x0002 0x0005 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x0002 Lane 2 0x0004 0x0002 0x8001 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x0004 Lane 3 0x0004 0x0004 0x8000 0x8001 0x8000 0x8000 0x8000 0x8000 0x8000 0x8000 0x0004 Frame Frame Frame Frame Frame Frame Frame Frame Frame Frame Frame n n + 1 n + 2 n + 3 n + 4 n + 5 n + 6 n + 7 n + 8 n + 9 n + 10 If multiple devices are all programmed to the transport layer test mode (while JESD_EN = 0), then JESD_EN is set to 1, and then SYSREF is used to align the LMFC of the devices, the patterns will be aligned to the SYSREF event (within the skew budget of JESD204B). For more details see JESD204B, section 5.1.6.3. 7.4.5.6 D21.5 Test Mode In this test mode, the controller transmits a continuous stream of D21.5 characters (alternating 0s and 1s). 7.4.5.7 K28.5 Test Mode In this test mode, the controller transmits a continuous stream of K28.5 characters. 7.4.5.8 Repeated ILA Test Mode In this test mode, the JESD204B link layer operates normally with one exception: when the ILA sequence completes, the sequence repeats indefinitely. Whenever the receiver issues a synchronization request, the transmitter will initiate code group synchronization. Upon completion of code group synchronization, the transmitter will repeatedly transmit the ILA sequence. If there is no active code group synchronization request at the moment the transmitter enters the test mode, the transmitter will behave as if it received one. 7.4.5.9 Modified RPAT Test Mode A 12-octet repeating pattern is defined in INCITS TR-35-2004. The purpose of this pattern is to generate white spectral content for JESD204B compliance and jitter testing. Table 39 lists the pattern before and after 8b10b encoding. Table 39. Modified RPAT Pattern Values 20b OUTPUT OF 8b10b ENCODER OCTET NUMBER Dx.y NOTATION 8-BIT INPUT TO 8b10b ENCODER (2 CHARACTERS) 0 D30.5 0xBE 0x86BA6 1 D23.6 0xD7 2 D3.1 0x23 0xC6475 3 D7.2 0x47 4 D11.3 0x6B 0xD0E8D 5 D15.4 0x8F 6 D19.5 0xB3 0xCA8B4 7 D20.0 0x14 8 D30.2 0x5E 0x7949E 9 D27.7 0xFB 10 D21.1 0x35 0xAA665 11 D25.2 0x59 54 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: ADC12J1600 ADC12J2700 |
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