SCAU058 April   2022

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 What is the TDP1204 EVM?
    2. 1.2 What is Included in the TDP1204 EVM?
    3. 1.3 What Does the EVM Look Like?
  3. 2Hardware Configuration
    1. 2.1 Power
    2. 2.2 Enable or Reset
    3. 2.3 Configuration Jumpers
    4. 2.4 Rx EQ Configuration
    5. 2.5 HPD Snoop Option
    6. 2.6 Local I2C Access
  4. 3Quick Start Guide
  5. 4Schematics
    1.     15
    2.     16
    3.     17
    4.     18
    5.     19
    6.     20
    7.     21
    8.     22

2.6 Local I2C Access

Access to TDP1204s local I2C signals is provided through the J5 connector. The TDP1204 supports either 1.2 V, 1.8 V and 3.3 V LVCMOS levels. The TDP1204 VIO pin is used to select which voltage level is used for the following 2-level control pins: LV_DDC_SDA, LV_DDC_SCL, SCL/CFG0, and SDA/CFG1. It is important that the I2C signalling levels meet the TDP1204 LVCMOS levels when I2C interface is accessed through the connector.

A standalone external I2C host can be connected through J5 for debug and control purposes. An example of an external I2C Host controller is the Total Phase Aardvark I2C/SPI Host Adapter (Total Phase Part#: TP240141). Sample scripts for this I2C host controller are provided by request.

The target I2C address for the TDP1204 can be modified by the EVM jumper JMP8. Please refer to the TDP1204 ADR/EQ pin setting and its corresponding I2C address. Refer to TDP1204 data sheet for the 7-bit I2C target address options.

Table 2-4 Aardvark I2C (J5) Pinout
J5 pin # Description J5 pin # Description
1 SCL_CTL 2 GND
3 SDA_CTL 4 NC
5 NC 6 NC
7 NC 8 NC
9 NC 10 GND