TLK3131_15 Datasheet, PDF (17/102 Pages) Texas Instruments – Single Channel Multi-Rate Transceiver

TLK3131
www.ti.com
SLLS957A – DECEMBER 2008 – REVISED DECEMBER 2009
2.7 Parallel Interface Modes - Detailed Description
The TLK3131 has several parallel interface modes. The major parallel interface modes of operation are
presented below:
2.7.1 RGMII Mode (Reduced Gigabit Media Independent Interface)
Table 2-3. RGMII – Lane To Functional Pin Mapping
DATA
CHANNEL
NUMBER
Channel 0
TX_EN/TX_ER
CONTROL BIT
(INPUT)
TXC_[4]
TRANSMIT
DATA NIBBLE
(INPUT)
TXD_[3:0]
RX_DV/RX_ER
CONTROL BIT
(OUTPUT)
RXD_[4]
RECEIVE
CONTROL
NIBBLE
(OUTPUT)
RXD_[3:0]
TRANSMIT
CLOCK
(INPUT)
TXCLK_[0]
RECEIVE
CLOCK
(OUTPUT)
RXCLK_[0]
TXCLK_[0]
TXD_[4:0]
DDR Source Centered Timing
Nibble Order = 1 (Default)
{TX_EN,Data0[3:0]}
{TX_EN^TX_ER,
Data0[7:4]}
{TX_EN,Data1[3:0]}
{TX_EN^TX_ER,
Data1[7:4]}
Note: If Nibble Order = 0, the picture is
the same except that
{TX_EN,DataN[3:0]} and
{TX_EN^TX_ER,DataN[7:4]} swap
locations.
RXCLK_[0]
RXD_[4:0]
{RX_DV,Data0[3:0]}
{RX_DV^RX_ER,
Data0[7:4]}
{RX_DV,Data1[3:0]}
{RX_DV^RX_ER,
Data1[7:4]}
TXCLK_[0]
TXD_[4:0]
DDR Source Aligned Timing
Nibble Order = 1 (Default)
{TX_EN,Data0[3:0]}
{TX_EN^TX_ER,
Data0[7:4]}
{TX_EN,Data1[3:0]}
{TX_EN^TX_ER,
Data1[7:4]}
Note: If Nibble Order = 0, the picture is
the same except that
{RX_DV,DataN[3:0]} and
{RX_DV^RX_ER,DataN[7:4]} swap
locations.
Note: If Nibble Order = 0, the picture is
the same except that
{TX_EN,DataN[3:0]} and
{TX_EN^TX_ER,DataN[7:4]} swap
locations.
RXCLK_[0]
RXD_[4:0]
{RX_DV,Data0[3:0]}
{RX_DV^RX_ER,
Data0[7:4]}
{RX_DV,Data1[3:0]}
{RX_DV^RX_ER,
Data1[7:4]}
Note: If Nibble Order = 0, the picture is
the same except that
{RX_DV,DataN[3:0]} and
{RX_DV^RX_ER,DataN[7:4]} swap
locations.
Figure 2-7. RGMII – Individual Channel Byte Ordering – Channel 0 Example
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Detailed Description
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