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K32L2AX Datasheet(PDF) 73 Page - NXP Semiconductors |
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K32L2AX Datasheet(HTML) 73 Page - NXP Semiconductors |
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73 / 96 page  The interface is designed to be used with synchronous Smart cards, meaning the EMV SIM module provides the clock used by the Smart card. The clock frequency is typically 372 times the Tx/Rx data rate. There is no timing relationship between the clock and the data. The clock that the EMV SIM module provides to the Smart card is used by the Smart card to recover the clock from the data in the same manner as standard UART data exchanges. All five signals of the EMV SIM module are asynchronous with each other. There are no required timing relationships between signals in normal mode. The smart card is initiated by the interface device; the Smart card responds with Answer to Reset. Although the EMV SIM interface has no defined requirements, the ISO/IEC 7816 defines reset and power-down sequences (for detailed information see ISO/IEC 7816). EMVSIMn_PD EMVSIMn_RST EMVSIMn_CLK EMVSIMn_IO EMVSIMn_VCCEN SI7 SI8 SI9 SI10 Figure 18. EMV SIM Clock Timing Diagram Peripheral operating requirements and behaviors K32 L2A Microcontroller with 512 KB Flash and 128 KB SRAM, Rev. 3, 02/2021 73 NXP Semiconductors |
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