Selecting Equalization / Boost Level for TUSB216
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SNLU260 – December 2019
Copyright © 2019, Texas Instruments Incorporated
TUSB216EVM User's Guide
"RX_ENA_HS" Jumper Settings:
1. Top position sets low RX sensitivity.
2. No connect RX_ENA_HS jumper sets mid RX sensitivity
3. Left position sets high RX sensitivity
4. Bottom position must be set to use ENA_HS LED indicator.
Right Position of RX_ENA_HS jumper is short to GND.
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Selecting Equalization / Boost Level for TUSB216
The primary purpose of the TUSB216 is to restore the signal integrity of a USB High-Speed channel up to
the USB connector. The platform goal is to pass the USB Near-End or Far-End Eye Mask with the
TUSB216 in the best location.
A typical use case is to place the TUSB216 close to the USB connector on a Host platform to pass Near-
End Eye Mask testing. This includes systems where the USB connector may be placed at the Far-End of
a cable.
Typical EQ and Boost recommendations based on cable length (28 AWG USB Cable).
Table 1. EQ/Boost Setting Based on Cable Length
CABLE LENGTH
TUSB216 BOOST
TUSB216 RX SEN
0m - 1m
EQ1
MID
1m – 2m
EQ2
MID
2m – 3m
EQ2
HIGH
3m – 5m
EQ3
HIGH
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EVM Operation
To install the EVM, perform the following steps:
1. Attach a USB2 or USB3 cable from a Host PC Type A connector to the Type B connector (P4) of the
TUSB216 EVM.
2. Attach a USB device either via cable or directly plugged into the Type A receptacle connector (P3) on
the TUSB216 EVM.
NOTE:
TUSB216EVM does not include I2C pull-up resistors. If I2C access is desired external pull-
up resistor to 3.3V are required.
