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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST25TA02K датащи(PDF) 24 Page - STMicroelectronics |
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ST25TA02K датащи(HTML) 24 Page - STMicroelectronics |
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24 / 50 page  RF command sets ST25TA02K 24/50 DocID027801 Rev 1 5.4 S-Block format The S-Block is used to exchange control information between a reader and a contactless tag. There are two requests using the S-Block format: • S(DES): the deselect command • S(WTX): the Waiting Frame eXtension command or response. A Waiting Time eXtension request occurs in RF when the operating time needed by ST25TA02K is greater than 19.2 ms. The WTX field indicates the increase time factor to be used in this command execution (FDTtemp = WTX * 19.2 ms). WTX depends on FWI. Table 17. S-Block format NFC frame SoD - EoD PCB DID Payload CRC Length 1 byte 1 byte 1 byte 2 bytes 0xC2: for S(DES) when the DID field is not present 0xCA: for S(DES) when the DID field is present 0xF2: for S(WTX) when the DID field is not present 0xFA: for S(WTX) when the DID field is present DID field (optional) WTX field (optional)(1) 1. This field is present when b5-b4 bits are set to 0b11 (S-Block is a WTX). see Table 18: S-Block detailed format. 2 CRC bytes Table 18. S-Block detailed format b7-b6 b5-b4 b3 b2 b1 b0 0b11 X X 0 1 0 S-Block 0b00: Deselect 0b11: WTX 0: DID field is not present 1: DID field is present Must be set to 0 Must be set to 1 Must be set to 0 |
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