آر اف (فرکانس رادیویی) و بی‌سیم آی‌سی آر‌اف‌آی‌دی و کنترل دسترسی

Product Attributes

Introduction

HT522A is a highly integrated contactless reader/writer chip operating at 13.56 MHz, supporting contactless reader/writer mode compliant with the ISO/IEC 14443 Type A protocol. It also provides a low-power external card detection function, making it suitable for battery-powered reader/writer devices that require low-power operation and need to process external cards entering the RF field at any time. The HT522A features low voltage, low power consumption, and single-ended drive. It is designed for contactless reader/writer applications with low power, low voltage, and low cost requirements. The HT522A supports the ISO/IEC 14443 A protocol and multiple data transfer rates.

Features

• ISO/IEC 14443A reader/writer protocol support
• ISO14443A communication rates: 106Kbps, 212Kbps, 424Kbps, 848Kbps
• Typical operating distance up to 50mm in reader mode, depending on antenna design and power supply
• Host interfaces: I2C (fast mode up to 400Kbps, high-speed mode up to 3.4Mbps), UART (up to 1.2Mbps), SPI (up to 10Mbps)
• 64-byte FIFO buffer for TX/RX
• Flexible interrupt modes
• Low-power hardware power-down mode
• Software power-down mode support
• LPCD function support
• Programmable timer
• Internal oscillator with 27.12MHz crystal
• 2.5V–4V wide-range supply voltage
• Programmable I/O pins
• Internal self-test function

Applications

• Attendance check-in
• Access control
• Public transportation
• Cafeteria dining
• Utility recharge (water/electricity/gas)
• Portable handheld devices
• Various membership systems