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ST95HF データシート(PDF) 18 Page - STMicroelectronics |
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ST95HF データシート(HTML) 18 Page - STMicroelectronics |
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18 / 93 page  Communication protocols ST95HF 18/93 DocID025630 Rev 4 4.3 Support of long frames In Reader mode it is possible to receive up to 528 bytes of frame data from VICC and Type- B cards and up to 256 bytes of frame data from Type-A cards. In this case, the device sends a reply to the external MCU in the following format: <ResultCode> + <Len> + <N bytes of data> Figure 10. Long frame format The number of databytes is 10-bit long. Table 7. Format of ResultCode Bit Meaning 7 Always 1 6 Bit 9 of Length See examples and explanation below 5 Bit 8 of Length 4 If set, there are residual bits in the last byte. Applicable only for Type-A protocol. 3:0 Always 0 Table 8. Examples of ResultCode: Len pairs ResultCode Len Length of data 0x80 0x00 0 0x80 0x01 1 0x80 0xFF 255 0xA0 0x00 256 0xA0 0x01 257 0xA0 0xFF 511 0xC0 0x00 512 0xC0 0x01 513 |
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