hcs362 Microchip Technology Inc., hcs362 Datasheet - Page 28

• Manufacturer Part Number: hcs362
• Description: Keeloq Code Hopping Encoder
• Manufacturer: Microchip Technology Inc.

HCS362
FIGURE 7-5:
MANCHESTER FORMAT SUMMARY (MOD=1)
T
PB
T
T
E
E
LOGIC "0"
LOGIC "1"
50% Duty Cycle
STOP bit
START bit
bit 0
bit 2
Preamble
bit 1
1 2
16
Guard
31
T
Encrypted Portion
Fixed Portion
4
T
X
E
X
E
Time
of Transmission
of Transmission
Preamble
Header
FIGURE 7-6:
MANCHESTER PREAMBLE/HEADER FORMAT (MOD=1)
P1
P16
Bit 0 Bit 1
Data Word
4 x T
E
Preamble
Header
Transmission
31 x T
E
Preliminary
DS40189D-page 28
2002 Microchip Technology Inc.