HCS360T/SN Microchip Technology, HCS360T/SN Datasheet - Page 5

• Manufacturer Part Number: HCS360T/SN
• Description: IC CODE HOPP ENCODR 15FUNC 8SOIC
• Manufacturer: Microchip Technology
• Type: Code Hopping Encoderr

Specifications of HCS360T/SN

• Applications: Remote Secure Access, Keyless Entry
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.0
As shown in the typical application circuits (Figure 2-1),
the HCS360 is a simple device to use. It requires only
the addition of buttons and RF circuitry for use as the
transmitter in your security application. A description of
each pin is described in Table 2-1.
FIGURE 2-1:
TABLE 2-1:
The HCS360 will wake-up upon detecting a button
press and delay approximately 10 ms for button
debounce (Figure 2-2). The synchronization counter,
Name
DATA
LED
V
V
2002 Microchip Technology Inc.
S0
S1
S2
S3
B4 B3 B2 B1 B0
SS
DD
Note:
B0
B1
V
DEVICE OPERATION
DD
Number
Five button remote control (Note
Pin
Two button remote control
Up to 15 functions can be implemented by pressing
more than one button simultaneously or by using a
suitable diode array.
1
2
3
4
5
6
7
8
PIN DESCRIPTIONS
S0
S1
S2
S3
Switch input 0
Switch input 1
Switch input 2 / Clock pin when in
Programming mode
Switch input 3
Ground reference
Data output pin /Data I/O pin for
Programming mode
Cathode connection for LED
Positive supply voltage
S0
S1
S2
S3
TYPICAL CIRCUITS
DATA
V
LED
V
DD
SS
DATA
V
V
Description
LED
SS
DD
V
1
)
DD
Tx out
Tx out
discrimination value and button information will be
encrypted to form the hopping code. The hopping code
portion will change every transmission, even if the
same button is pushed again. A code word that has
been transmitted will not repeat for more than 64K
transmissions. This provides more than 18 years of use
before a code is repeated; based on 10 operations per
day. Overflow information sent from the encoder can be
used to extend the number of unique transmissions to
more than 192K.
If in the transmit process it is detected that a new but-
ton(s) has been pressed, a RESET will immediately
occur and the current code word will not be completed.
Please note that buttons removed will not have any
effect on the code word unless no buttons remain
pressed; in which case the code word will be completed
and the power-down will occur.
FIGURE 2-2:
Yes
RESET and Debounce Delay
Load Transmit Register
(A button has been pressed)
Word Transmission
Update Sync Info
Complete Code
Sample Inputs
Encrypt With
ENCODER OPERATION
Power-Up
Crypt Key
Released
Transmit
Buttons
(10 ms)
Buttons
Added
Stop
All
?
?
Yes
No
HCS360
DS40152E-page 5
No