HCS360-IP Microchip Technology, HCS360-IP Datasheet - Page 11

• Manufacturer Part Number: HCS360-IP
• Description: KEELOQ CODE HOPPING ENCODER
• Manufacturer: Microchip Technology

FIGURE 4-1:
FIGURE 4-2:
FIGURE 4-3:
1996 Microchip Technology Inc.
1 2
TOTAL TRANSMISSION:
TOTAL TRANSMISSION:
(2 bit)
CODE WORD:
CRC
CODE WORD:
1 2
4 5 6
(2 bit)
Preamble Sync Encrypt
CRC
TRANSMISSION FORMAT—MANCH = 0
TRANSMISSION FORMAT—MANCH = 1
CODE WORD ORGANIZATION (RIGHT-MOST BIT IS CLOCKED OUT FIRST)
V
(1 bit)
T
LOW
Preamble
E
Preamble
4 5 6
V
Fixed Code Data
BPW
LOW
bit
Preamble
LOGIC "0"
LOGIC "1"
(4 bits)
Button
Status
LOGIC "0"
LOGIC "1"
Sync
1 CODE WORD
+
1 CODE WORD
Encrypt
13 14 15
13 14 15
Serial Number
Fixed
Button Status (32 bits)
Serial Number and
16
Fixed
28-bit
1
16
2
Preliminary
3 5 7 9
Guard
1
4 6 8 10
Sync
Sync
Code Word
CODE WORD
Guard
2
3
4
Start bit
Preamble Sync Encrypt
Preamble
Encrypted
(4 bits)
Button
Status
Data
Encrypted
TX Data
+
Sync
Discrimination
Encrypted Code Data
MSB
Encrypt
(12 bits)
32 bits of Encrypted Data
bits
Fixed Code
T
E
Data
BIT
Fixed Code
Data
T
Stop bit
E
Synch Value
16-bit
HCS360
LSB
Guard
Time
DS40152C-page 11
67 bits
of Data
Transmitted
Guard
Time