DS90CR486_15 Datasheet, PDF (14/22 Pages) Texas Instruments – 133MHz 48-Bit Channel Link Deserializer (6.384 Gbps)

DS90CR486
SNLS149C – FEBRUARY 2003 – REVISED MARCH 2013
www.ti.com
CONFIGURATION 3
DS90CR481/483 and DS90CR486 with DC Balance OFF (BAL=Low, CON1=High, 66MHz to 112MHz) − The
input to the DS_OPT pin of the transmitter DS90CR481/483 in this configuration is completely ignored by the
transimitters. In order to initialize the deskew operation on the receiver DS90CR486, data and clcok must be
applied to the transimitter when power up. The "DESKEW" and CON1 pins on the receiver DS90CR486 must be
tied to High for this setup.
CONFIGURATION 4
DS90CR485 and DS90CR484 with DC Balance ON (BAL=High, 66MHz to 80MHz) − The DS_OPT pin at the
input of the transmitter DS90CR485 must be applied low for a minimum of four clock cycles in order for the
receiver to complete the deskew operation. The input to the DS_OPT pin can be applied at any time after the
PLL has locked to the input clock frequency. In this setup, the "DESKEW" pin on the receiver DS90CR484 must
set High.
CONFIGURATION 5
DS90CR485 and DS90CR486 with DC Balance ON (BAL=Hiigh, CON1=High, 66MHz to 133MHz) − The
DS_OPT pin at the input of the transmitter DS90CR485 can be set to High OR Low when power up. The period
of this input to the DS_OPT pin must be at least 20ms (TX and RX PLLs lock time) plus 4096 clock cycles in
order for the receiver to complete the deskew operation. The "DESKEW" and CON1 pins on the receiver
DS90CR486 must set High.
CONFIGURATION 6
DS90CR485 and DS90CR486 with DC Balance OFF (BAL=Low, CON1=High, 66MHz to 133MHz) −The input to
the DS_OPT pin of the transmitter DS90CR485 in this configuration is completely ignored. In order to initialize
the deskew operation on the receiver DS90CR486, data and clcok must be applied to the transimitter when
power up. The "DESKEW" and CON1 pins on the receiver DS90CR486 must set High.
DESKEW NOT SUPPORTED
Deskew function is NOT supported in these configuration setups. The deskew feature is only supported with DC
Balance ON (BAL=High) for DS90CR484. Note that the deskew function in the DS90CR486 works in both DC
Balance and NON-DC Balance modes.
NOTE
For more details on Deskew operation, please refer to the APPLICATIONS
INFORMATION section.
14
Submit Documentation Feedback
Product Folder Links: DS90CR486
Copyright © 2003–2013, Texas Instruments Incorporated