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PS081 Folha de dados(PDF) 82 Page - ams AG |
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PS081 Folha de dados(HTML) 82 Page - ams AG |
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82 / 155 page ![]() acam-messelectronic gmbh - Friedrich-List-Str.4 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de 4-25 PSØ81 Fig. 4.19: Oscillograph of LOAD and SPI signals In Fig. 19 you can see that SPI_DO gives an interrupt after the last discharging cycle of the measure- ment was done. Fig. 4.20: Reading of measurement values after interrupt This oscillograph shows again the SPI_DO interrupt from 1 -> 0 and the response from the exter- nal microcontroller with SPI_CSN. This short pulse on SPI_CSN switches SPI_DO to communication mode. Then the opcode is sent to PS08 (not in the chart, this appears on line SPI_DI) and after 2 bytes the measurement results (3 bytes) is transmitted via SPI_DO (marked in the graph by ‚data out‘). Member of the ams Group |
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