HCS362-I Datasheet, PDF (27/38 Pages) Microchip Technology – KEELOQ Code Hopping Encoder

FIGURE 7-2: PWM FORMAT SUMMARY (MOD=0)
50% Duty Cycle
Preamble
1
16
HCS362
LOGIC "0"
LOGIC "1"
TE TE TE
TBP
31XTE Preamble
10xTE _{Encrypted Portion}
Header of Transmission
Fixed Portion
of Transmission
Guard
Time
FIGURE 7-3:
PWM PREAMBLE/HEADER FORMAT (MOD=0)
P1
P16
Bit 0 Bit 1
31xTE 50% Duty Cycle Preamble
3 or 10xTE Header Data Bits
FIGURE 7-4:
PWM DATA FORMAT (MOD = 0)
Serial Number
Function Code Status CRC/TIME QUEUE
LSB
MSB LSB
MSB S3 S0 S1 S2 VLOW CRC0 CRC1 Q0 Q1
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 Bit 67 Bit 68
Header Encrypted Portion
Fixed Portion of Transmission
Guard
Time
© 2002 Microchip Technology Inc.
Preliminary
DS40189D-page 27