SD307EVK/NOPB National Semiconductor, SD307EVK/NOPB Datasheet - Page 3

• Manufacturer Part Number: SD307EVK/NOPB
• Description: EVAL BOARD FOR LMH0307
• Manufacturer: National Semiconductor

Specifications of SD307EVK/NOPB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SDI Input and SDO Output
The SDI input connectors (J1 and J2) are 50Ω SMA connectors. The SD303/SD307 is initially configured for 100Ω
differential input. To configure the SD303/SD307 for 50Ω single-ended input, remove R28 and place 49.9Ω 0402
resistors in R9 and R10. When using only one input, the other input should be terminated with a 50Ω SMA
termination.
The SDO output connectors (J3 and J4 for the SD303; and J3, J4, J5, and J6 for the dual output SD307) are 75Ω
BNC connectors. When using only one side of an output pair, the other side should be terminated with a 75Ω BNC
¯¯¯¯¯ should be terminated with a 75Ω BNC
termination. For example, when only using SDO0 on the LMH0307, SDO0
termination.
DC Power Connectors and USB Connector
The red and black binding posts (J8 and J9) provide power for the LMH0303/LMH0307 device, and the USB
connection provides power for the remaining board functions, including the microcontroller and the LEDs. For
proper operation, the SD303/SD307 should first be powered with a DC input voltage (between J8 and J9) of
3.3V ± 5% (3.6V maximum), and then the USB cable should be connected between the evaluation board and
the PC. The POWER LED will flash Red while the board is powered from the 3.3 VDC supply alone, and then
change to solid Green once the USB cable is connected to the PC. The POWER LED will remain Green as long as
the board is powered correctly.
JP1 – LMH0303/LMH0307 Jumper Connection to Microcontroller
A jumper block should be placed on JP1 to connect the LMH0303/LMH0307 pins to the microcontroller. The ALP
software will not function correctly if this jumper block is not in place. Separate jumpers may be used, but they
¯¯¯¯ (pins 5-6), ENABLE (pins 7-8), SDA (pins 9-10), SCL
must be placed to connect the following pins of JP1: RSTI
¯¯¯¯¯¯ (pins 15-16), and RSTO
¯¯¯¯¯ (pins 17-18). This jumper block (or individual
(pins 11-12), SD/HD (pins 13-14), FAULT
jumpers) may be removed to control the LMH0303/LMH0307 pins externally, but then the microcontroller will no
longer be able to communicate with the cable driver.
Controls and Indicators
ENABLE
The ENABLE push button switch controls ENABLE, and the ENABLE LED shows its state. The ENABLE LED is
Green when the cable driver is enabled (ENABLE = 1), and Red when the cable driver is disabled (ENABLE = 0).
¯¯¯¯
When the cable driver is disabled, it enters a deep power down mode, and Termination Fault detection and LOS
detection no longer function.
¯¯¯¯ detection still
If the LOSEN register bit (bit 4 of register 05h) is set, then the cable driver can be disabled with LOS
¯¯¯¯ is combined with the ENABLE functionality. In this mode, disabling the device
functioning. With LOSEN set, LOS
by pushing the ENABLE switch will still power down the device completely (including powering down Termination
¯¯¯¯ detection), but if ENABLE is left active and the signal is removed from the input, the
Fault detection and LOS
¯¯¯¯ detection still functioning. When the input signal is reapplied, the device will
device will power down with the LOS
power back on.
SD/HD
The SD/HD push button switch controls SD/HD, and the SD/HD LED shows its state. The SD/HD LED is Green
when the cable driver is configured for HD/3G edge rates (SD/HD = 0), and Red when the cable driver is configured
for SD edge rates (SD/HD = 1). The default setting for the SD/HD LED is Green for HD/3G edge rates.
SD303/SD307 EVK User Guide
3 of 27
Rev 1.2
© 2010, National Semiconductor Corp.