Datasheet

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Interfaces

The installer for the USB EVB installs:

1. A loader driver

2. A binary to load onto the USB interface IC

3. An Thumbus controller driver for direct access to the device

4. An Thumbus DLL for application access to the device

2.4 SMBus Interface (SMBus)

Pin Name Description

1 GND Ground reference

2 SMBC SMB clock pin. This pin is pulled to 3.3 VDC through a 10-kΩ resistor. Do not exceed 5.6 VDC on

this pin.

3 SMBD SMB data pin. This pin is pulled to 3.3 VDC through a 10-kΩ resistor. Do not exceed 5.6 VDC on

this pin.

4 NC Not connected on this board. This pin is floating.

5 I2C_VOUT The naming of this pin is proprietary and is not part of I2C port definition. It provides 5V output

when enabled from the host software. It is used by bqEASY to support auto cycle. Do not exceed

5.6 VDC on this pin.

SLUU399A–April 2010–Revised March 2011 Thumbus2300

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