HCS370_11 MICROCHIP [Microchip Technology], HCS370_11 Datasheet
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HCS370_11
Manufacturer Part Number
HCS370_11
Description
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.HCS370_11.pdf
(42 pages)
FEATURES
Security
• Two programmable 32-bit serial numbers
• Two programmable 64-bit encoder keys
• Two programmable 60-bit seed values
• Each transmission is unique
• 67/69-bit transmission code length
• 32-bit hopping code
• Crypt keys are read protected
Operating
• 2.05-5.5V operation
• Six button inputs
• 15 functions available
• Four selectable baud rates
• Selectable minimum code word completion
• Battery low signal transmitted to receiver
• Nonvolatile synchronization data
• PWM, VPWM, PPM, and Manchester modulation
• Button queue information transmitted
• Dual Encoder functionality
Other
• On-chip EEPROM
• On-chip tuned oscillator (±10% over voltage and
• Button inputs have internal pull-down resistors
• LED output
• PLL control for ASK and FSK
• Low external component count
• Step-up voltage regulator
Typical Applications
The HCS370 is ideal for Remote Keyless Entry (RKE)
applications. These applications include:
• Automotive RKE systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage door openers
• Identity tokens
• Burglar alarm systems
2011 Microchip Technology Inc.
temperature)
K
EE
L
OQ
®
Code Hopping Encoder
PACKAGE TYPES
HCS370 BLOCK DIAGRAM
GENERAL DESCRIPTION
The HCS370 is a code hopping encoder designed for
secure Remote Keyless Entry (RKE) and secure
remote control systems. The HCS370 utilizes the
K
rates high security, a small package outline, and low
cost to make this device a perfect solution for unidirec-
tional authentication systems and access control sys-
tems.
The HCS370 combines a hopping code generated by a
nonlinear encryption algorithm, a serial number, and
status bits to create a secure transmission code. The
length of the transmission eliminates the threat of code
scanning and code grabbing access techniques.
RFEN
EE
V
V
LED
STEP
V
SS
DD
IN
L
PDIP, SOIC,
TSSOP
DATA
OQ ®
Step-up
regulator
code hopping technology, which incorpo-
SLEEP/S5
SHIFT
SHIFT
RESET circuit
LED driver
Oscillator
RF Enable
S0
S1
S2
S3
S4
EEPROM
S5
HCS370
1
2
3
4
5
6
7
S4
32-bit SHIFT register
Button input port
Controller
S3
S2
14
13
12
10
11
DS41111E-page 1
9
8
Encoder
S
1
V
Vss
LED
DATA
RFEN
STEP
V
Power
latching
and
switching
DD
IN
S
0
SLEEP