SLLU327 May   2020 TUSB217A

 

  1.   Trademarks
  2. 1TUSB217AEVM-BC
  3. 2TUSB217AEVM-BC Board Description
  4. 3TUSB217AEVM-BC Kit Contents
  5. 4EVM Configuration
    1. 4.1 Setting EVM Jumpers
    2. 4.2 Selecting Configuration Levels
    3. 4.3 Battery Charging Functions of TUSB217A
      1. 4.3.1 Automatic DCP/CDP Test Setup
      2. 4.3.2 Manual DCP/CDP Test Setup
  6. 5EVM Operation
  7. 6TUSB217AEVM-BC Schematics
  8. 7TUSB217AEVM-BC Bill of Materials (BOM)

4.1 Setting EVM Jumpers

The TUSB217AEVM-BC has two 3 × 3 headers and a 6 × 2 header in each board partition to facilitate configuration changes.

The BOOST and RX_SEN 3 × 3 headers are arranged to allow for all possible device configurations, including connecting RX_SEN to an LED so that the ENA_HS status output can be viewed easily. The corner pins of the 3 × 3 headers are not connected.

The 6 × 2 header adds the ability to connect onboard pullups to the SDA and SCL pins to support I2C operation. If I2C mode is not needed, the SCL/CD pin can be connected to an LED so the CD status can be easily checked. Also, the 6 × 2 header provides connections for ground and to supply power manually to the EVM. In addition, the header adds the ability to enable CDP and DCP modes on the TUSB217A.

Table 4-1 6 × 2 Configuration Header Pinout
Row 1 Row 2
VCC_EXT_Px -EVM External Power Input

If used, the onboard 0-Ω resistor between VCC_US_Px and VCC_EXT_Px must be removed.

 SW_VCC_Px - 3.3-V Power for I2C Interface.

Provided by an onboard regulator.

SDA_Px - I2C Serial Data to TUSB217A

 4.7-kΩ I2C pullup - can be jumpered to SDA_Px. To enable I2C mode, the pullups on both SDA and SCL must be connected at power on or after a reset.

SCL/CD_Px - I2C Serial Clock or Connect Detect Output to TUSB217A

 4.7-kΩ I2C pullup - can be jumpered to SCL/CD_Px.

To enable I2C mode, the pullups on both SDA and SCL must be connected at power on or after a reset.
CD_Px - Connect Detect LED. The LED can be jumpered to SCL/CD_Px so USB connection status can be easily determined.

GND
CDP_DCP- BC 1.2 Mode configuration to TUSB217A.

Jumpering this pin to GND enables DCP mode. CDP is enabled by internal pullup.

GND

GND

GND

Changing jumper settings without a complete understanding of the result is not recommended. Configuration inputs are only read by the TUSB217A during power on reset or after de-asserting the RSTN pin by pressing the provided onboard reset button (SW1, SW2, SW3). Changing settings while the EVM is powered on has no effect. Refer to the device data sheet for detailed pin descriptions and functionality along with EVM schematic for additional information.

Table 4-2 3 × 3 Boost Header
No Connect 3.6 kΩ to GND No Connect
1.8 kΩ to GND BOOST to TUSB217A GND
No Connect 0 Ω to GND No Connect

BOOST jumper settings as defined in Table 4-2.

  1. Center pin to the bottom position sets BOOST Level 0
  2. Center pin to the left position sets BOOST Level 1
  3. Center pin to the top position sets BOOST Level 2
  4. No connect of the center pin sets BOOST Level 3

The right position of the BOOST jumper is short to GND.

Table 4-3 3 × 3 RX_SEN Header
No Connect 27 kΩ to GND No Connect
13 kΩ, 39-kΩ divider RX_SEN to TUSB217A GND
No Connect ENA_HS LED No Connect

RX_SEN jumper settings as defined in Table 4-3.

  1. The top position sets low RX sensitivity.
  2. No connect of the center pin sets mid RX sensitivity.
  3. The center pin to the left position sets high RX sensitivity.
  4. The center pin to the bottom position enables the ENA_HS status LED.

Right Position of RX_SEN jumper is short to GND.