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SRT512 датащи(PDF) 19 Page - STMicroelectronics |
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SRT512 датащи(HTML) 19 Page - STMicroelectronics |
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19 / 46 page ![]() SRT512 Memory mapping Doc ID 13277 Rev 4 19/46 4.4.2 Fixed Chip_ID (Option) The SRT512 is provided with an anticollision feature based on a random 8-bit Chip_ID. Prior to selecting an SRT512, an anticollision sequence has to be run to search for the Chip_ID of the SRT512. This is a very flexible feature, however the searching loop requires time to run. For some applications, much time could be saved by knowing the value of the SRT512 Chip_ID beforehand, so that the SRT512 can be identified and selected directly without having to run an anticollision sequence. This is why the SRT512 was designed with an optional mask setting used to program a fixed 8-bit Chip_ID to bits b7 to b0 of the system area. When the fixed Chip_ID option is used, the random Chip_ID function is disabled. |
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