EV2300是一個基于USB的解決方案，可用于評估應用TI的芯片設計的用于測量PC機電池電量的電路。 EV2300通過USB電纜的連接，也從一個電池電量計電路的通信端口（SMBus或HDQ）接受輸入。通過運行相應的PC軟件，EV2300接口板允許用戶評估電池電量測試電路。
技術描述:
EV2300 Controller
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
應用特性
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
方案原理圖
PCB 參考圖：
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