hcs515 Microchip Technology Inc., hcs515 Datasheet - Page 4

• Manufacturer Part Number: hcs515
• Description: Keeloq Code Hopping Decoder Keeloq Code Hopping Decoder
• Manufacturer: Microchip Technology Inc.

HCS515
FIGURE 1-3:
NOTE: Circled numbers indicate the order of execution.
2.0
DS40183D-page 4
PIN
Note:
10
12
13
14
11
1
2
3
4
5
6
7
8
9
5
PIN ASSIGNMENT
Perform Function
P = power, I = in, O = out, and ST = Schmitt Trigger input.
Indicated by
Button Press
button press
Function
Information
Decoder
S_DAT
S_CLK
MCLR
RF_IN
GND
V
NC
NC
NC
NC
NC
NC
S1
S0
DD
BASIC OPERATION OF RECEIVER (DECODER)
1
2
Received Information
Serial Number
Check for
I/O
I/O
Match
—
—
—
—
—
—
—
—
O
O
I
I
I
(1)
Type
Buffer
TTL
TTL
TTL
TTL
TTL
ST
—
—
—
—
—
—
—
—
Synchronization
Encrypted Data
Decrypted
(1)
K
Decryption
Algorithm
32 Bits of
Counter
EE
L
3
No connection
No connection
Power connection
S1 function output
S0 function output
Master clear input
No connection
No connection
Synchronous data from controller
Synchronous clock from controller
Input from RF receiver
Ground connection
No connection
No connection
OQ
Manufacturer Code
4
Description
EEPROM Array
Check for
Serial Number
Match
Sync Counter
Crypt Key
2002 Microchip Technology Inc.