HCS361 Datasheet, PDF (20/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS361
TABLE 8-5 CODE WORD TRANSMISSION TIMING PARAMETERS
VPWM Mode (FAST = 0)
VDD = +2.0 to 6.6V
Commercial (C): Tamb = 0°C to +70°C
Industrial
(I): Tamb = -40°C to +85°C
FAST = 0,
Shortest
Code Words Transmitted
FAST = 0,
Longest
Symbol
Characteristic
Number
of TE
Min
Typ.
Max.
Number
of TE
TE
Basic pulse element
1
260 400 620
1
TP
Preamble duration
28
7.3 11.2 17.4
28
TH
Header duration
10
2.6 4.0 6.2
10
THOP Hopping code duration
32
8.3 12.8 19.8
64
TFIX
Fixed code duration
35
9.1 14.0 21.7
70
TG
Guard Time
112
29.1 44.8 69.4
112

Total Transmit Time
217
56.4 86.8 134.5 284

VPWM data rate

3846 2500 1613

Note: The timing parameters are not tested but derived from the oscillator clock.
Min. Typ. Max. Units
260 400 620 µs
7.3 11.2 17.4 ms
2.6 4.0 6.2 ms
16.6 25.6 39.7 ms
18.2 28.0 43.4 ms
29.1 44.8 69.4 ms
73.8 113.6 176.1 ms
3846 2500 1613 ms
VPWM Mode (FAST = 1)
VDD = +2.0 to 6.6V
Commercial (C): Tamb = 0°C to +70°C
Industrial
(I): Tamb = -40°C to +85°C
FAST = 1,
Shortest
Code Words Transmitted
FAST = 1,
Longest
Symbol
Characteristic
Number
of TE
Min
Typ.
Max.
Number
of TE
TE
Basic pulse element
1
130 200 310
1
TP
Preamble duration
28
3.6 5.6 8.7
28
TH
Header duration
10
1.3 2.0 3.1
10
THOP Hopping code duration
32
4.2 6.4 9.9
64
TFIX
Fixed code duration
35
4.6 7.0 10.9
70
TG
Guard Time
224
29.1 44.8 69.4
224

Total Transmit Time
329
42.8 65.8 102.0 396

VPWM data rate

7692 5000 3226

Note: The timing parameters are not tested but derived from the oscillator clock.
Min. Typ. Max. Units
130 200 310 µs
3.6 5.6 8.7 ms
1.3 2.0 3.1 ms
8.3 12.8 19.8 ms
9.1 14.0 21.7 ms
29.1 44.8 69.4 ms
51.5 79.2 122.8 ms
7692 5000 3226 bps
DS40146C-page 20
Preliminary
© 1996 Microchip Technology Inc.