CLINK3V48BT-133 National Semiconductor, CLINK3V48BT-133 Datasheet - Page 19

• Manufacturer Part Number: CLINK3V48BT-133
• Description: BOARD EVAL FOR DS90CR485, 486
• Manufacturer: National Semiconductor

Specifications of CLINK3V48BT-133

• Main Purpose: Interface, SerDes (Serializer / De-Serializer)
• Embedded: No
• Utilized Ic / Part: DS90CR485, DS90CR486
• Primary Attributes: Serializes 48 LVCMOS/LVTTL to 8 LVDS, 66 ~ 133 MHz
• Secondary Attributes: Transmits over 2 Meter 3M MDR LVDS Cable
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Transmitter PRBS Generator Mode
The DS90CR485 transmitter is equipped with an internal test pattern generator
that can be used to check signal quality (eye-patterns) on the link. To enable this
test mode, select PRBS ENABLE from the switch block SW2 and choose either
the PRBS_15 or the PRBS_23 pattern.
Designator
SW2
LVDS Cable Sense (TSEN) Status Flag
The TSEN pin reports the presence of a remote termination resistor on the LVDS
clock line. The user may monitor the status of the TSEN pin through jumper (J9).
When TSEN is HIGH, a termination resistor of approximately 100 Ohms has
been detected. When TSEN is LOW, no termination has been detected. The
TSEN status flag provides a “gross detect function,” meaning it is meant check
whether a cable or other interconnect is present between the transmitter and
receiver. A high signal on the TSEN line does not guarantee the termination is
correct or the link is capable of carrying data without bit errors. See the
DS90CR485 datasheet for more detail on the TSEN pin.
DS90CR485/486 Evaluation Kit User Manual
Rev. 1.01
PRBS DISABLE
PRBS DISABLE
DC BAL OFF
DC BAL OFF
PWR DOWN
PWR DOWN
PRBS_15
PRBS_15
PLLSEL
PLLSEL
TEST1
TEST1
TEST2
TEST2
Settings
HIGH
HIGH
DC BAL ON
DC BAL ON
PRBS ENABLE
PRBS ENABLE
PRBS_23
PRBS_23
HIGH
HIGH
HIGH
HIGH
DEVICE ENABLE
DEVICE ENABLE
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