The EV2300 controller is a bq8012 running at 4 MHz. The controller firmware is stored in flash memory and is executed by the core at power-up after the boot ROM code verifies the integrity words.
The controller communicates with target device(s) through either:a 2-wire SMBus communication port,a 1-wire HDQ port, or a 2-wire E2PROM I2C port. The 2-wire SMBus communication port supports both SMBus and I2C protocols.
2.3 USB Interface (USB)
The interface board connects to a USB port(version 1.1)on a host computer and is powered from the port.All communication over the USB is proprietary and does not fit any USB-defined device classes.Therefore communication with the device requires a loader and driver from Texas Instruments.
The loader enumerates the device (determines it is present on the USB), then loads the EV2300 controller firmware for the USB interface. Once the firmware load is complete, the loader sends a command to the USB interface IC to execute the new program and the loader driver exits. A new driver takes control and enumerates the EV2300 and makes the device present to programs running on the host.
The installer for the USB EVB installs:
1. A loader driver
2. A binary to load onto the USB interface IC
3. An EV2300 controller driver for direct access to the device
4. An EV2300 DLL for application access to the device
USB-based interface board for evaluation of battery fuel gauge circuits developed with fuel gauge ICs using the HDQ and SMBus communication protocol
Provides interface between intelligent battery circuit and a Windows-based PC
Connects to the USB port of a PC
Allows for on screen display and programming of gas gauge register functions when used with the appropriate PC software