HCS101/P

HCS101 HCS101 Fixed Code Encoder The 8-pin HCS101 operates over a wide voltage range FEATURES of 3.5V to 13.3V and has three button inputs allowing the system designer the freedom to utilize up to 7 func- Operating tions. The only components required for device opera- 2 Programmable 32-bit Serial Numbers tion are the buttons and RF circuitry, allowing a very low 10-bit Serial Number system cost. 66-bit Transmission Code Length PACKAGE TYPES Nonvolatile 16-bit Counter PDIP, SOIC 3.5V -13.3V Operation 3 Inputs, 7 Functions Available 8 S0 VDD 1 Selectable Baud Rate NC 7 2 S1 Automatic Code Word Completion Battery Low Signal Transmitted to Receiver 6 DATA 3 S2 Other VSS NC 4 5 Pinout Compatible With Most KEELOQ Encoders Simple Programming Interface HCS101 BLOCK DIAGRAM On-chip EEPROM On-chip Oscillator and Timing Components Power Oscillator Button Inputs Have Internal Pull-down Resistors latching Controller and Minimum External Components Required switching RESET Circuit Typical Applications The HCS101 is ideal for remote control applications. These applications include: EEPROM Low-end Automotive Alarm Systems Low-end Automotive Immobilizers DATA Transmit register Gate and Garage Door Openers Identity Tokens Button input port Low-end Burglar Alarm Systems VSS Fan and Lighting Controls VDD Toys S2 S1 S0 DESCRIPTION The HCS101 from Microchip Technology Inc. is a fixed code encoder designed for remote control systems. It provides a small package outline and low cost to make this device a perfect solution for unidirectional remote control systems. It is pin compatible with Microchips HCS201 Code Hopping Encoder allowing easy upgrading to a more secure remote keyless entry (RKE) system. 1999-2017 Microchip Technology Inc. Preliminary DS40001115E-page 1HCS101 The EEPROM data for each transmitter is programmed 1.0 SYSTEM OVERVIEW by the manufacturer at the time of production. As indicated in the block diagram in Figure 1-1, the Any type of controller may be used as a receiver, but it HCS101 has a small EEPROM array, which must be is typically a microcontroller with compatible firmware loaded with several parameters before use. These that allows the receiver to operate in conjunction with a parameters include: transmitter, based on the HCS101. Two 32-bit serial numbers 16-bit counter value Additional 10-bit serial number Configuration data FIGURE 1-1: BASIC OPERATION OF TRANSMITTER ENCODER Transmitted Information Serial Function Function Serial Number 1 Counter Number 3 Bits Bits EEPROM Array Serial Number 3 Counter Serial Number 1 1999-2017 Microchip Technology Inc. Preliminary DS40001115E-page 2