MCS3122-I/ST Microchip

MCS3122 MCS3122 Advanced KEELOQ Technology Encoder Data Sheet Features Overview Typical Applications Advanced KEELOQ Technology: MCS3122 is ideal for Remote Keyless Entry (RKE) - Programmable 32-bit serial number applications. These applications include: - Programmable 32-bit serial number for seed Automotive RKE Systems transmissions Automotive Alarm Systems - AES-128 block cipher Gate and Garage Door Openers - Programmable 128-bit crypt key Home Security Systems - 160/192-bit transmission code length: Security and Safety Sensors - 32-bit unencrypted portion Remote Control - 128-bit encrypted, code hopping portion Remote Keypad - 32-bit authorization check (optional) Wireless Sensors Operating Features: - 2.0 to 3.7V operation Package Type - Three switch inputs - Seven functions available 14-Pin TSSOP - One active-low LED drive - Configurable maximum code word FIGURE 1: 14-PIN TSSOP RF: - Configurable bit rate 14 VDD 1 VSS - Configurable modulation, supporting FSK 13 2 SW0 LED and OOK 3 12 SW1 CTRL OUT - Configurable data modulation, supporting 11 4 DATA OUT SW2 PWM and Manchester 10 5 VDD XTAL Other: 9 6 CTRL IN DATA IN - Button inputs have internal pull-up resistors 8 7 VSS RFOUT TABLE 1: PIN DESCRIPTION Name 14-Pin TSSOP Input Type Output Type Description VDD 1 Power Power LED 2 TTL LED Output (active-low) CTRL OUT 3 TTL Transmitter Clock SW2 4 TTL Switch 2 Input VDD 5 Power Power CTRL IN 6 TTL Transmitter Clock RFOUT 7 RF Transmitter Output VSS 8 Power Power DATA IN 9 TTL Transmitter Data XTAL 10 Analog Transmitter Reference Oscillator DATA OUT 11 TTL Transmitter Data SW1 12 TTL Switch 1 Input SW0 13 TTL Switch 0 Input VSS 14 Power Power 2014 Microchip Technology Inc. DS40001762A-page 1 MCS3122MCS3122 Table of Contents 1.0 General Description ................................................................................................................................................................... 3 2.0 Device Description .................................................................................................................................................................... 4 3.0 Memory Organization................................................................................................................................................................. 5 4.0 Advanced KEELOQ Technology Operation............................................................................................................................... 9 5.0 Transmitter Operation .............................................................................................................................................................. 12 6.0 Integrating MCS3122 into a System ........................................................................................................................................ 15 7.0 Electrical Specifications ........................................................................................................................................................... 17 8.0 Packaging Information ............................................................................................................................................................. 18 The Microchip Web Site ....................................................................................................................................................................... 23 Customer Change Notification Service ................................................................................................................................................ 23 Customer Support................................................................................................................................................................................ 23 Product Identification System .............................................................................................................................................................. 24 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: