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参数资料
| 型号： | PGA309EVM |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | PGA309 Evaluation Module(PGA309评估模块) |
| 中文描述： | PGA309评估模块（PGA309评估模块） |
| 文件页数： | 33/53页 |
| 文件大小： | 4221K |
| 代理商： | PGA309EVM |
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7.8 Interface
The “Interface” section in the Main Window allows for selection of One-Wire or Two-Wire digital
communication with the PGA309 Sensor Interface Board. Refer to Figure 24. A single click in the respective
circle will select the desired interface. All Board Control Software functionality is supported over either of
these interfaces, however the One-Wire interface is the preferred one due to potential conflicts arising from
two Two-Wire masters (PC and PGA309) sharing the bus. It is recommended to have PRG wire connected on
the PGA309 Sensor Board even when using Two Wire communication. The Board Control Software
addresses PGA309 using One-Wire interface prior to closing the switches U10/U11.
This stops any activity
by the PGA309 on the Two-Wire interface for 1 second and prevents any bus conflicts.
By pushing the
“COM Port Setup” button a pop-up “COM Port Setup” window will appear in the Main Window. In the pop-up
window the desired interface may also be selected as well as which PC COM port (“Port #”) will be used and
the Baud Rate (“Baud Rate”) for Communication through the selected COM Port. Drop-down menus are used
to select both the desired COM Port and Baud Rate. Once the interface is selected it may be tested by
pushing the “Apply/Detect” button or by pushing the “OK” button, in the pop-up window.
Page 33 of 53
Figure 24: Interface Section and COM Port Setup Pop-up Window
7.9 Updates
The “Updates” section (see Figure 25) in the Main Window provides options for how certain calculations and
readings in the Main Window are updated. If the “Autocalc Chksum” box is checked then both the
configuration register part checksum (Checksum1) and the temperature coefficient part checksum
(Checksum2) for the external EEPROM are computed automatically after every change. If the box is not
checked then the calculations of the checksums may be manually accomplished by pushing the “Update
Checksums” button or entering the checksum values directly from hand calculation.
The “Keep comm alive” box, when checked, reads the Temp ADC register and updates the Main Window
reading about every 0.75 second, depending upon the operating system used. This will prevent the 1s timeout
in the PGA309 from expiring thus stopping EEPROM read-back updates even if Test Pin is set low.
The “Instant Update” box, when checked, updates the PGA309 Registers immediately after every bit change
without having to push the “Write PGA309” button. Remember that unless Test pin is set high these settings
will be overwritten by valid external EEPROM data.
Figure 25: Updates Section
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PGA309EVM-EU | 功能描述:光学传感器开发工具 PGA309 Eval Mod- Wldwide RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| PGA309EVM-US | 功能描述:光学传感器开发工具 PGA309 Eval Mod- US & Canada RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| PGA309EVM-USB | 功能描述:放大器 IC 开发工具 PGA309 Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| PGA309EVM-USB | 制造商:Texas Instruments 功能描述:ANALOG SIGNAL CONDITIONING EVAL. MODULE |
| PGA309-HT | 制造商:TI 制造商全称:Texas Instruments 功能描述:VOLTAGE OUTPUT PROGRAMMABLE SENSOR CONDITIONER |
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