Texas Instruments Thumbus™-2300-SMB Evaluation Module THUMBUS2300 THUMBUS2300 데이터 시트
제품 코드
THUMBUS2300
Interfaces
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1.3
Ordering Information
Table 1. Ordering Information
EVM Part Number
THUMBUS2300
2
Interfaces
The Thumbus interfaces are described in the following table. The reference designators on the circuit
board and the functions are also listed.
board and the functions are also listed.
Reference
Function
Function
Designator
SMB
SMBus Interface ports
Terminal block (USB mini-AB connector) for connecting to a
target device
target device
USB
USB Interface port
Interface to host computer
2.1
Overview
The Thumbus is enclosed and is provided as shown.
2.2
Thumbus Controller
The Thumbus controller is a bq8015 running at 12 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.
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 a 2-wire SMBus communication port. The
2-wire SMBus communication port supports SMBus protocols.
2-wire SMBus communication port supports SMBus 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.
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 Thumbus
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 Thumbus and makes the device present to programs running on the
host.
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 Thumbus and makes the device present to programs running on the
host.
2
Thumbus2300
SLUU399A – April 2010 – Revised March 2011
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