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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9654 데이터시트(PDF) 45 Page - STMicroelectronics |
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L9654 데이터시트(HTML) 45 Page - STMicroelectronics |
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45 / 59 page  DocID14218 Rev 3 45/59 L9654 Functional description 58 4.13.4 Arming MISO_A bit definition Arming MISO_A is defined in the table below. Table 31. Arming MISO_A bit definition 7 6 5 4 3 2 1 0 X X ARM23 ARM01 X X ARM23 ARM01 4.13.5 ARM[01..23] Arming status. These bits are used to echo arming bits sent in the previous arming command. A value of 1 indicates that arming signal is enabled for the respective loop-pair. A value of 0 indicates that arming signal is disabled for the respective loop-pair. The default state of these arming signals is ‘0’ (disabled). 4.14 Satellite sensor interface The device provides four currents limited to 60mA each through outputs ICH1 and ICH2. The voltage at these two channels is supplied by the V8BUCK input. Channels 1 and 2 serve as switched power sources to remote mounted satellite sensors, each draws 2 current levels. The L9654 monitors the current flow from its output pin and “demodulates” the current to be decoded using Manchester protocol. Decoded satellite message is communicated to an external microprocessor via SPI. Figure 18. Satellite interface block diagram |
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