Texas Instruments SN65LVPE512, Руководство пользователя

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Introduction
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1 Introduction
The SN65LVPE512 is a dual-channel, single lane USB 3.0 redriver and signal conditioner supporting data
rates of 5 Gbps. The device complies with USB 3.0 specification revision 1.0, supporting electrical idle
condition and low-frequency periodic signals (LFPS) for USB 3.0 power management modes.
The SN65VLPE512 minimizes signal degradation effects such as crosstalk and inter-symbol interference
(ISI) that limit interconnect distance between two devices. The input stage of each channel offers
adjustable equalization that compensates for the distortion the USB 3.0 input signal experienced. The
output stage offers adjustable de-emphasis that will compensate for distortion the output signal will
experience. The optimal equalization and de-emphasis levels will depend on the length of the input and
output interconnections. The SN65VLPE512 provides a unique way to tailor output de-emphasis on a per-
channel basis with use of the DE and OS pins. All TX and RX equalization and de-emphasis settings are
programmed by six 3-state pins as shown in
Table 1 .
2 LVPE512 Evaluation Module
This sections contains the kit contents and operational description of the EVM as well as configuration
instructions and suggested default settings.
3 Kit Contents
• 1 SN65LVPE512 Evaluation Module
• This user manual
3.1 Operational Description of EVM
This EVM facilitates the simple evaluation of the LVPE512 USB 3.0 redriver by providing an easy and
efficient method for changing the configuration settings of the device. Physical switches on the EVM are
used to modify these settings by altering the state of the programmable 3-state configuration pins. Further
information on how to use these switches to configure the device is found in
Table 1 .
The EVM board includes one USB 3.0 plug and one USB 3.0 receptacle to allow for device
interconnections. The EVM board is powered by a 3.3-V supply voltage, which is derived from the internal
VBUS power supply of the USB connection, therefore, no external power source is required for the EVM
to operate.
Table 1. Configuration of EVM
Switch Pin Description Switch Position and Corresponding Setting
SW1 DE1 (De-emphasis channel 1) 1: –3.5 dB
2: 0 dB
3: –6.0 dB
SW2 EQ1 (Equalization channel 1) 1: 7 dB
2: 0 dB
3: 15 dB
SW3
(1)
OS1 (Output swing channel 1) 1: 1105 mVpp
2: 1241 mVpp
3: 1324 mVpp
SW4 DE2 (De-emphasis channel 2) 1: –3.5 dB
2: 0 dB
3: –6.0 dB
SW5 EQ2 (Equalization channel 2) 1: 7 dB
2: 0 dB
3: 15 dB
SW6
(1)
OS2 (Output swing channel 2) 1: 1105 mVpp
2: 1241 mVpp
3: 1324 mVpp
SW7 EN_RXD 1: Enabled
2: N/A (two position switch)
3: Sleep Mode
(1)
SW3, SW6 have incorrectly labeled settings on their silkscreen.
2 SN65LVPE512 EVM SLLU213 – February 2015
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