SNLU301 November   2021 SN75LVPE5412 , SN75LVPE5421

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  Redriver-Mux 5-Level I/O Control Inputs
    2. 2.2  Redriver-Mux Modes of Operation
    3. 2.3  Redriver-Mux SMBus or I2C Register Control Interface
    4. 2.4  Redriver-Mux Equalization Control
    5. 2.5  Redriver-Mux RX Detect State Machine
    6. 2.6  Redriver-Mux DC Gain Control
    7. 2.7  DS320PR412-421EVM Global Controls
    8. 2.8  DS320PR412-421EVM Downstream Devices Control
    9. 2.9  DS320PR412-421EVM Upstream Devices Control
    10. 2.10 Quick-Start Guide (Pin Mode)
    11. 2.11 Quick-Start Guide (SMBus Slave Mode)
  4. 3Schematics
  5. 4PCB Layouts
  6. 5Bill of Materials

2.4 Redriver-Mux Equalization Control

Each channel of the DS320PR412, DS320PR421, SN75LVPE5412 and SN75LVPE5421 features a continuous-time linear equalizer (CTLE) that applies high-frequency boost and low-frequency attenuation to help equalize the frequency-dependent insertion loss effects of the passive channel. Table 2-4 shows available equalization boost index through EQ control pins (EQ1 and EQ0) for all channels when in Pin Control mode (MODE = L0). Please refer to data sheet for actual EQ Gain values.

Table 2-4 Equalization Control Settings
EQ INDEX EQ1 PIN LEVEL EQ0 PIN LEVEL
0 L0 L0
1 L0 L1
2 L0 L2
3 L0 L3
4 L0 L4
5 L1 L0
6 L1 L1
7 L1 L2
8 L1 L3
9 L1 L4
10 L2 L0
11 L2 L1
12 L2 L2
13 L2 L3
14 L2 L4
15 L3 L0
16 L3 L1
17 L3 L2
18 L3 L3
19 L3 L4

The equalization gain of each channel of each device can also be set by writing to SMBus / I2C registers in I2C Mode.