TLK6002 Datasheet, PDF (18/96 Pages) Texas Instruments – Dual Channel 0.47Gbps to 6.25Gbps Multi-Rate Transceiver

TLK6002
SLLSE34 – MAY 2010
www.ti.com
Table 2-5. OBSAI Line Rate Selection⁽¹⁾
LINE RATE
(Mbps)
SERDES PLL
MULTIPLIER VALUE
RATE SELECT (PINS OR
REGISTER VALUE)
TXCLK_A/B
(MHz)
REFCLKP/N
(MHz)
6144.00
20/25
Full
307.2
153.60/122.88
3072.00
20/25
Half
153.6
153.60/122.88
1536.00
20/25
Quarter
76.8
153.60/122.88
768.00
20/25
Eighth
38.4
153.60/122.88
(1) In DDR mode TX_CLK frequencies will be half the values in the table above. The table above indicate two possible REFCLK
frequencies, 153.60MHz and 122.88MHz which can be used based on the application preference. The Serdes PLL Multiplier (MPY) has
been given for each REFCLK frequency respectively. Note that Channel A and B are independent, and their application rates and
references clocks are separate.
2.4 Parallel Interface Modes
2.4.1 20-bit SDR (Single Data Rate) Mode (8b/10b Encoder/Decoder Disabled)
Channel A TX: TDA_[19:0] → TXAP/N (using TXCLK_A). RX: RXAP/N → RDA_[19:0] (using RXCLK_A).
Channel B TX: TDB_[19:0] → TXBP/N (using TXCLK_B). RX: RXBP/N → RDB_[19:0] (using RXCLK_B).
20 Bits (two symbols) of already encoded (TX) or undecoded (RX) data are transferred per parallel
interface clock cycle. Symbols are defined by a group of 10 parallel bits. Note that four symbols are shown
in Figure 2-1: Data0[19:10], Data0[9:0], Data1[19:10], Data1[9:0].
Symbol Transmission Order:
When 3.5/3.4 = 0: Data0[19:10] is the first transmitted or received symbol. Data0[9:0] is next, then
Data1[19:10].
When 3.5/3.4 = 1: Data0[9:0] is the first transmitted or received symbol. Data0[19:0] is next, then
Data1[9:0].
Bit Transmission Order within a Symbol:
When 8.3/2 = 0, Data[19] or Data[9] bits are serially transmitted first or received first respectively per
symbol.
When 8.3/2 = 1, Data[10] or Data[0] bits are serially transmitted first or received first respectively per
symbol.
18
Description
Submit Documentation Feedback
Product Folder Link(s): TLK6002
Copyright © 2010, Texas Instruments Incorporated