HCS360 Datasheet, PDF (20/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS360
TABLE 8-5 CODE WORD TRANSMISSION TIMING PARAMETERS—MANCHESTER MODE
VDD = +2.0V to 6.6V
Commercial (C):Tamb = 0°C to +70°C
Industrial (I):Tamb = -40°C to +85°C
Code Words Transmitted
FAST1 = 0,
FAST0 = 0
FAST1 = 0,
FAST0 = 1
Symbol
Characteristic
Number
of TE
Min.
Typ.
Max.
Number
of Te
Min.
Typ. Max. Units
TE Basic pulse element
1
520 800 1240
1
260 400 620 µs
TP Preamble duration
32
16.6 25.6 39.7
32
8.3 12.8 19.8 ms
TH Header duration
4
2.1 3.2 5.0
4
1.0 1.6 2.5 ms
TSTART Start bit
2
1.0 1.6 2.5
2
0.5 0.8 1.2 ms
THOP Hopping code duration
64
33.3 51.2 79.4
64
16.6 25.6 39.7 ms
TFIX Fixed code duration
70
36.4 56.0 86.8
70
18.2 28.0 43.4 ms
TSTOP Stop bit
2
1.0 1.6 2.5
2
0.5 0.8 1.2 ms
TG Guard Time (LNGRD = 0) 8
4.2 6.4 9.9
16
4.2 6.4 9.9 ms
— Total transmit time
182 94.6 145.6 223.7 196 50.76 78.4 121.5 ms
— Manchester data rate
— 1923 1250 806
— 3846.2 2500 1612.9 bps
Note: The timing parameters are not tested but derived from the oscillator clock.
VDD = +2.0V to 6.6V
Commercial (C):Tamb = 0°C to +70°C
Industrial (I):Tamb = -40°C to +85°C
FAST1 = 1,
FAST0 = 0
Code Words Transmitted
FAST1 = 1.
FAST0 = 1
Symbol
Characteristic
Number
of TE
Min.
Typ.
Max.
Number
of Te
Min.
Typ.
Max. Units
TE
TP
TH
TSTART
THOP
Basic pulse element
Preamble duration
Header duration
Start bit
Hopping code duration
1
260 400 620
1
130 200 310 µs
32
8.3 12.8 19.8
32
4.2 6.4 9.9 ms
4
1.0 1.6 2.5
4
0.5 0.8 1.2 ms
2
0.5 0.8 1.2
2
0.3 0.4 0.6 ms
64
16.6 25.6 39.7
64
8.3 12.8 19.8 ms
TFIX Fixed code duration
70
18.2 28.0 43.4
70
9.1 14.0 21.7 ms
TSTOP Stop bit
2
0.5 0.8 1.2
2
0.3 0.4 0.6 ms
TG Guard Time (LNGRD = 0) 16
4.2 6.4 9.9
32
4.2 6.4 9.9 ms
— Total transmit time
196 50.96 78.4 121.5 212 27.6 42.4 65.7 ms
— Manchester data rate
— 3846.2 2500.0 1612.9 — 7692.3 5000.0 3225.8 bps
Note: The timing parameters are not tested but derived from the oscillator clock.
DS40152C-page 20
Preliminary
© 1996 Microchip Technology Inc.