TLK6002 Datasheet, PDF (84/96 Pages) Texas Instruments – Dual Channel 0.47Gbps to 6.25Gbps Multi-Rate Transceiver

TLK6002
SLLSE34 – MAY 2010
www.ti.com
– Write 1’b1 to 4.3 DATAPATH_RESET
• Enable Test Pattern Verification:
– Write 1’b1 to 7.12 TP_VERIFY_EN
• The pattern verification is now in progress.
• PRBSA_PASS contains a real time output that when low indicates the input PRBS pattern on RXAP/N
contains error.
• PRBSB_PASS contains a real time output that when low indicates the input PRBS pattern on RXBP/N
contains error.
• The following steps can be performed if the number of errors needs to be monitored:
– Read 14.15:0 ERROR_COUNTER[15:0] and discard the value.
– Read 14.15:0 ERROR_COUNTER[15:0], and verify 16’h0000 is read to confirm error free
operation. (as many times as desired during the duration of the test period)
4.19.2.2 2⁷-1 / 2²³-1 / 2³¹-1 PRBS Pin Based Testing
• Note: PRBS TX does not support eighth rate mode.
• Device Pin Setting(s):
– Ensure PRBS_EN primary input pin is high.
– PRBS Selection
• PRBS 2³¹-1 will be selected by default.
• Reset Device:
– Issue a hard or soft reset (RESET_N asserted –or- Write 1 to 0.15 GLOBAL_RESET)
• Select SERDES Reference Clock Input:
– If REFCLK_0_P/N used - Ensure REFCLK_A_SEL (or REFCLK_B_SEL if channel B is used)
primary input pin is low
– If REFCLK_1_P/N used - Ensure REFCLK_A_SEL (or REFCLK_B_SEL if channel B is used)
primary input pin is high
• Ensure a legal reference clock operation frequency is selected based on Appendix B (Continuous Rate
Device Configuration), and provision CHANNEL_CONTROL_1 register accordingly. (Note: Eighth
Rate TX Is Not Supported).
• Serial Configuration
– Configure the following bits per the desired application:
• 1.9:8 (LOOP_BANDWIDTH[1:0])
• 2.12:8 (TWPOST1[4:0])
• 2.7:4 (TWPRE[3:0])
• 2.3:0 (SWING[3:0])
• 8.14:12 (EQPRE[2:0])
• 8.11:10 (CDRTHR[1:0]) = 2’b01
• 8.9:8 (CDRFMULT[1:0]) = 2’b00
• 1.3:0 PLL_MULT[3:0]
• 1.7:6 RATE_TX[1:0]
• 1.5:4 RATE_RX[1:0]
• Check SERDES PLL Status for Locked State
– Poll 5.0 PLL_LOCK (per channel) until it is asserted (high).
• Toggle ENRX
– Write 1’b0 to 20.2 (ENRX)
– Write 1’b1 to 20.2 (ENRX)
• Select Test Pattern if either 2⁷-1 or 2²³-1 PRBS Pattern is desired. Skip this step if 231-1 PRBS
Pattern is desired.
84
ELECTRICAL SPECIFICATIONS
Submit Documentation Feedback
Product Folder Link(s): TLK6002
Copyright © 2010, Texas Instruments Incorporated