Si3262 is a highly integrated low-power SoC chip that integrates a low-power MCU based on RISC-V core and a contactless reader module working at 13.56MHz.
In ACD mode, the card swiping distance of this chip can reach 4-5cm (determined by the antenna), and is suitable for smart door locks, electronic locks, cabinet locks, sauna locks, logistics locks, etc.
The MCU module has low power consumption, Low Pin Count, wide voltage operating range, and integrates 13/14/15/16-bit precision ADC, LVD, UART. SPI. I2C, TIMER, WUP, IWDG, RTC, TSC and other rich peripherals. The core uses RISC-V RV32IMAC (2.6 CoreMarkMHz).
The reader/writer module supports ISO/EC 14443 ABMIFARE protocol and supports automatic carrier detection function (ACD).
No other external circuits are required, and its internal transmitter can drive the reader antenna to communicate with ISO/EC 14443 AB/MIFARE cards and transponders. The receiver module provides a powerful and efficient circuit for demodulating and decoding ISO/IEC 14443A/BMIFARE compliant card and transponder signals. The digital module handles complete ISO/EC 14443 A/B framing and error detection functions (parity and CRC). In ACD mode, the reader/writer module is in sleep state most of the time.
3K RC wakes up regularly, detects 13.56 MHz RF fields and RF cards with extremely low power consumption, and automatically generates an interrupt to wake up the MCU when the field or card is detected. The functions of detecting fields and cards can be enabled independently. The entire ACD process does not require MCU intervention.
The reader/writer module supports MIFARE products. The reader/writer module supports contactless communication, and the bidirectional communication rate with the MIIFARE series is up to 848kBd.
In addition, this product provides supporting debugging and development software and a rich function library, which can greatly reduce the development threshold and shorten the development cycle.
1.1 MCU module features
●Built-in RISC-V RV32IMAC core (2.6 CoreMark/MHz);
●Maximum 32MHz operating frequency;
●Built-in 4kB SRAM;
●Built-in 32kB embedded FLASH and 4.51kB NVM, which can be erased and written at least 100,000 times;
●Built-in 1 SPI MASTER;
●Built-in 1 I2C MASTER;
●Built-in 2 UARTs support up to 1Mbps;
●Built-in 2 advanced TIMERs, TIMER1 has 4 channels of complementary PWM;
●One 64-bit system timer SysTick (MTIME), which cannot be used for timing;
●Built-in a fast high-precision 13/14/15/16bit ADC and integrated 1.2V high-precision reference;
●Wide ADC input voltage range: 0~4.8V, the maximum input voltage shall not be higher than VDD_ MCU voltage;
●ADC supports 10 input channels, 8 of which can be used for external external voltage measurement;
●Built-in low-voltage detection module;
●Supports up to 15 GPIOs and supports external interrupts; .
●Integrated capacitive touch detection module TSC, supporting up to 15 channels;
●PA10 can be used as BOOT configuration;
●Built-in hardware watchdog;
●Built-in 1 RTC, which can be used for timing;
●Built-in 1 WUP;
●Supports 4 low power consumption modes, the lowest power consumption is less than 0.6uA (watchdog working);
●Built-in 32-bit true random number generator; .
●Support cJTAG 2-wire debugging interface;
●Operating voltage range: 1.8~5.5V;
1.2 Reader module characteristics.
●Highly integrated analog circuit, demodulation and decoding response;
●Buffered output driver, using minimal external components to connect to the antenna;
●Support ISO/IEC 14443 A/B/MIFARE;
●The operating distance of reader mode depends on the size and number of turns of the antenna. The typical operating distance is 50mm;
●Supports MIFARE series cards in reader/writer mode;
●Support ISO/EC 14443 A/B/Mifare higher rate communication, up to 848kBd;
●Supported host interfaces:
SPI interface with rates up to 10 Mbits/s
I2C interface, fast mode rate up to 400 kBd, high speed mode rate up to 3400 kBd
Serial UART, rate up to 1228 8 kBd
●64-byte FIFO;
●Flexible interrupt mode;
●Low power consumption hard reset function;
●Support soft power-down mode;
●Integrated programmable timer;
●27.12MHz internal oscillator;
●Power supply voltage 2.5V-3.6V;
●Integrated CRC coprocessor;
●Programmable I/O pins;
●Support ACD mode: .
ACD mode supports automatic detection of 13.56 MHz RF fields and RF cards
The ACD process does not require MCU intervention in
the OSC oscillation failure monitoring function
1.3 Other features
●Ultra-low power consumption, the lowest power consumption reaches 1.7uA (the MCU module is in power-down mode, and the card reader module is in hard power-down mode);
●Typical ACD mode power consumption is 4.1uA (the MCU module is in power-down mode, and the reader module’s card search interval is 500ms);
●Operating temperature range -40 ~ 85%C;
●Support QFN0505-32L packaging;
●Very few peripheral components, reducing system application costs;
●It is equipped with mature development and debugging software and rich function libraries, which can greatly reduce the development threshold and shorten the development cycle.
