HCS361 Datasheet, PDF (18/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS361
FIGURE 8-3:
PWM PREAMBLE/HEADER FORMAT
Preamble
SPM = 0
Header
30Te
SPM = 1
10Te
10Te
FIGURE 8-4: PWM DATA WORD FORMAT
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 Data
Fixed Code Data
Guard
Time
FIGURE 8-5: VPWM FORMAT SUMMARY (VPWM = 1)
Wakeup
Dead Time
Preamble
Header
Encrypt
Serial Number Function
FIGURE 8-6:
VPWM WAKEUP FORMAT
Wakeup
TE
252 TE
Dead Time
256 TE
VLOW
CRC
FIGURE 8-7:
VPWM PREAMBLE/HEADER FORMAT
Preamble
SPM = 0
Header
30Te
SPM = 1
10Te
10Te
FIGURE 8-8: VPWM DATA WORD FORMAT
Encrypted Data
Serial Number
Function Code
CRC
10 0 1
101 1 10 0 1
10 0 1 10 0 1 101
01 2 3
28 29 30 31 28 29 30 31
56 57 58 59 60 61 62 63 64 65 66
bit
Note: The bit values are only shown as an example.
VLOW
DS40146C-page 18
Preliminary
© 1996 Microchip Technology Inc.