MFRC631 is a highly integrated transceiver IC that enables contactless communication at 13.56 MHz.
MFRC631 transceiver ICs support the following operating modes:
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支持ISO/IEC 14443A/MIFARE的读/写模式
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支持ISO/IEC 14443B的读/写模式
The MFRC631's internal transmitter can drive read/write antennas designed to communicate with ISO/IEC 14443A/MIFARE cards and transmit transponders without the need for additional active circuitry. The digital module manages the full ISO/IEC 14443A framing and error detection functions (parity and parity CRC).
MFRC631 supports MIFARE Classic 1K, MIFARE Classic 4K, MIFARE Ultralight, MIFARE Ultralight C, MIFARE PLUS and MIFARE DESFire products. MFRC631 supports high transmission speeds of bidirectional MIFARE up to 848 kbit/s.
MFRC631 supports Layers 2 and 3 of the ISO/IEC 14443B read/write communication scheme, with the exception of conflict prevention. Collision prevention needs to be implemented in the firmware of the host controller as well as in the upper layer.
The following host interfaces are supported:
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串行外设接口(SPI)
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串行UART（类似RS232，电压电平取决于针脚电压供应）
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I²C总线接口（已实施两个版本：I2C和I2CL）
MFRC631 supports Secure Access Module (SAM) connectivity. A dedicated stand-alone I2C interface enables SAM connectivity. SAM can be used for high-security key storage and as an extremely high-performance cryptographic coprocessor. A dedicated SAM can be used to connect to MFRC631.
Features and Benefits:
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高射频输出功率前端IC，可实现高达848 kbit/s的传输速率
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支持ISO/IEC 14443 A/MIFARE、ISO/IEC 14443 B标准
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读/写模式下支持MIFARE Classic加密
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低功耗卡检测
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可实现符合“EMV非接触式协议规范V2.0.1”的RF等级
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使用最少外部组件的天线连接
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支持的主机接口：
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最快10 Mbit/s的SPI
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I²C总线接口，快速模式下最高400 kBd，超快速模式下最高1000 kBd
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最高1228.8 kBd的RS232串行UART，其电压电平取决于针脚电压源
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可实现安全访问模块(SAM)连接的独立I²C总线接口
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512字节大小的FIFO缓冲区，可实现最高处理性能
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灵活高效的省电模式，包括硬关断、待机和低功耗卡检测
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通过从27.12 MHz射频石英晶体获取系统CPU时钟的集成式PLL节省成本
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3 V至5.5 V的电源
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多达8个可自由编程的输入/输出针脚
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读/写模式下与ISO/IEC 14443A/MIFARE卡通信的典型工作距离长达12 cm，具体取决于天线尺寸和调谐情况
//www.chip100.com/