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  Microchip Technology Semiconductor Electronic Components Datasheet  

HCS101 Datasheet

Fixed Code Encoder

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HCS101
Fixed Code Encoder
FEATURES
Operating
• 2 Programmable 32-bit Serial Numbers
• 10-bit Serial Number
• 66-bit Transmission Code Length
• Nonvolatile 16-bit Counter
• 3.5V -13.3V Operation
• 3 Inputs, 7 Functions Available
• Selectable Baud Rate
• Automatic Code Word Completion
• Battery Low Signal Transmitted to Receiver
Other
• Pinout Compatible With Most KEELOQ® Encoders
• Simple Programming Interface
• On-chip EEPROM
• On-chip Oscillator and Timing Components
• Button Inputs Have Internal Pull-down Resistors
• Minimum External Components Required
Typical Applications
The HCS101 is ideal for remote control applications.
These applications include:
• Low-end Automotive Alarm Systems
• Low-end Automotive Immobilizers
• Gate and Garage Door Openers
• Identity Tokens
• Low-end Burglar Alarm Systems
• Fan and Lighting Controls
• Toys
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 Microchip’s HCS201 Code
Hopping Encoder allowing easy upgrading to a more
secure remote keyless entry (RKE) system.
The 8-pin HCS101 operates over a wide voltage range
of 3.5V to 13.3V and has three button inputs allowing
the system designer the freedom to utilize up to 7 func-
tions. The only components required for device opera-
tion are the buttons and RF circuitry, allowing a very low
system cost.
PACKAGE TYPES
PDIP, SOIC
S0 1
8 VDD
S1 2
7 NC
S2 3
6 DATA
NC 4
5 VSS
HCS101 BLOCK DIAGRAM
Oscillator
RESET Circuit
Controller
Power
latching
and
switching
DATA
VSS
VDD
EEPROM
Transmit register
Button input port
S2 S1 S0
1999-2017 Microchip Technology Inc.
Preliminary
DS40001115E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

HCS101 Datasheet

Fixed Code Encoder

No Preview Available !

HCS101
1.0 SYSTEM OVERVIEW
As indicated in the block diagram in Figure 1-1, the
HCS101 has a small EEPROM array, which must be
loaded with several parameters before use. These
parameters include:
• Two 32-bit serial numbers
• 16-bit counter value
• Additional 10-bit serial number
• Configuration data
The EEPROM data for each transmitter is programmed
by the manufacturer at the time of production.
Any type of controller may be used as a receiver, but it
is typically a microcontroller with compatible firmware
that allows the receiver to operate in conjunction with a
transmitter, based on the HCS101.
FIGURE 1-1:
BASIC OPERATION OF TRANSMITTER ENCODER
Transmitted Information
EEPROM Array
Serial Number 3
Counter
Serial Number 1
Serial Function
Number 3 Bits
Counter
Serial Number 1
Function
Bits
1999-2017 Microchip Technology Inc.
Preliminary
DS40001115E-page 2


Part Number HCS101
Description Fixed Code Encoder
Maker Microchip
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HCS101 Datasheet PDF






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