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CFA633-RDI-KS датащи(PDF) 66 Page - Crystalfontz America, Inc. |
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CFA633-RDI-KS датащи(HTML) 66 Page - Crystalfontz America, Inc. |
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66 / 88 page ![]() Crystalfontz America, Inc. Data Sheet Release Date 2012/02/21 www.crystalfontz.com CFA633-RDI-KS LCD Module (Hardware v2.0 / Firmware s2v1) February 2012 Page 66 APPENDIX A: CONNECTING A DS2450 1-WIRE QUAD A/D CONVERTER This appendix describes a simple test circuit that demonstrates how to connect a Dallas Semiconductor DS2450 4- channel ADC to the CFA633’s DOW (Dallas One Wire) connector. It also gives a sample command sequence to initialize and read the ADC. Up to 32 DOW devices can be connected to the CFA633. In this example the DS2450 appears at device index 0. Your software should query the connected devices using command 18 (0x12): Read DOW Device Information (Pg. 47) to verify the locations and types of DOW devices connected in your application. Please refer to the DS2450 Data Sheet and the description for command 20 (0x14): Arbitrary DOW Transaction (Pg. 49) more information. Appendix A, Figure 1. Test Circuit Schematic Start 633_WinTest and open the Packet Debugger dialog. Select Command 20 = Arbitrary DOW Transaction, then paste each string below into the data field and send the packet. The response should be similar to what is shown. To “DOW” connector on CFA-633 |
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