HCS361_11 Datasheet, PDF (27/42 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder incorporates high security,

HCS361
FIGURE 9-2:
PWM FORMAT SUMMARY (MOD = 0)
CODE WORD:
TXWAK=0 ^TBP
1
6
Duty Cycle: 1/3-2/3
(TXWAK=0)
Duty Cycle: 1/6-2/6
(TXWAK=1)
LOGIC 0
TE LOGIC 1
TBP=3XTE
LOGIC 0
TBP
TE _{LOGIC 1}
TBP
TBP
10
TXWAK=1
33% Duty Cycle
18xTE Preamble
SPM=1
SPM=0
10xTE Sync 10xTE Header Encrypted Portion
Pulse
Code Word
Fixed Code Portion
Guard
Time
FIGURE 9-3:
PWM PREAMBLE/HEADER FORMAT (MOD=0)
SPM = 0
28xTE Preamble
SPM = 1
10xTE Sync Pulse
10xTE Header
FIGURE 9-4:
PWM DATA FORMAT (MOD=0)
Serial Number
Function Code
Status CRC
LSB
MSB LSB
MSB S3 S0 S1 S2 VLOW CRC0 CRC1
Bit 0 Bit 1 Bit 30 Bit 31 Bit 32 Bit 33 Bit 58 Bit 59 Bit 60 _{Bit 61} Bit 62 Bit 63 Bit 64 Bit 65 Bit 66
Header
Encrypted Portion
of Transmission
Fixed Portion of Transmission
Guard
Time
© 2011 Microchip Technology Inc.
DS40146F-page 27