SERDES Evaluation Kit DS99R105/106 USB Version 0.1 Users Manual
National Semiconductor Corporation
Date: 5/14/2008
Page 3 of 37
Introduction:
National Semiconductor’s SERDES evaluation kit contains one (1) DS99R105 Serializer
(Tx) board, one (1) DS99R106 De-serializer (Rx) board, and one (1) two (2) meter high
speed USB 2.0 cable.
Note: the demo boards are not for EMI testing. The demo boards were designed for
easy accessibility to device pins with tap points for monitoring or applying signals,
additional pads for termination, and multiple connector options.
The DS99R105/106 chipset supports a variety of display applications. The single FPD-
LINKII (FPD-Link
II)
interface is well-suited for any display system interface. Typical
applications include: navigation displays, automated teller machines (ATMs), POS,
video cameras, global positioning systems (GPS), portable equipment/instruments,
factory automation, etc.
The DS99R105 and DS99R106 can be used as a 24-bit general purpose FPD-Link
II
Serializer and De-serializer chipset designed to transmit data at clocks speeds ranging
from 3 to 40 MHz.
The Serializer board accepts LVCMOS input signals. The FPD-Link
II
Serializer converts
the LVCMOS parallel lines into a single serialized FPD-LINKII data pair with an
embedded FPD-LINKII clock. The serial data stream toggles at 28 times the base
clock rate. With an input clock at 40 MHz, the transmission rate for FPD-Link
II
line is
960Mbps.
The De-serializer board accepts the FPD-Link
II
serialized data stream with embedded
clock and converts the data back into parallel LVCMOS signals and clock. Note that
NO reference clock is needed to prevent harmonic lock as with other devices currently
on the market.
Suggested equipment to evaluate the chipset, an LVCMOS signal source such as a
video generator or word generator or pulse generator and oscilloscope with a bandwidth
of at least 40 MHz will be needed.
The user needs to provide the proper LVCMOS/RGB inputs and LVCMOS/clock to the
Serializer and also provide a proper interface from the De-serializer output to an LCD
panel or test equipment. The Serializer and De-serializer boards can also be used to
evaluate device parameters. A cable conversion board or harness scramble may be
necessary depending on type of cable/connector interface used on the input to the
DS99R105 and to the output of the DS99R106.
Example of suggested display setup:
1) video generator with LVCMOS output
2) 6-bit LCD panel with a LVCMOS input interface.
