HCS360 Datasheet, PDF (19/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS360
TABLE 8-4 CODE WORD TRANSMISSION TIMING PARAMETERS—PWM 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
TE
TBP
TP
TH
THOP
TFIX
Basic pulse element
PWM bit pulse width
Preamble duration
Header duration
Hopping code duration
Fixed code duration
1
260 400 620
1
3
780 1200 1860
3
32
8.3 12.8 19.8
32
10
2.6 4.0 6.2
10
96
25.0 38.4 59.5
96
105
27.3 42.0 65.1
105
TG
Guard Time (LNGRD = 0)
16
4.2 6.4 9.9
32
—
Total transmit time
259
67.3 103.6 160.6 275
—
PWM data rate
—
1282 833 538
—
Note: The timing parameters are not tested but derived from the oscillator clock.
Min. Typ. Max. Units
130 200 310 µs
390 600 930 µs
4.2 6.4 9.9 ms
1.3 2.0 3.1 ms
12.5 19.2 29.8 ms
13.7 21.0 32.6 ms
4.2 6.4 9.9 ms
35.8 55.0 85.3 ms
2564 1667 1075 bps
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 = 1,
FAST0 = 0
FAST1 = 1,
FAST0 = 1
Symbol
Characteristic
Number
of TE
Min.
Typ.
Max.
Number
of Te
TE Basic pulse element
1
130 200 310
1
TBP PWM bit pulse width
3
390 600 930
3
TP Preamble duration
32
4.2 6.4 9.9
32
TH Header duration
10
1.3 2.0 3.1
10
THOP Hopping code duration
96
12.5 19.2 29.8
96
TFIX Fixed code duration
105 13.7 21.0 32.6 105
TG Guard Time (LNGRD = 0) 32
4.2 6.4 9.9
64
— Total transmit time
275 35.8 55.0 85.3 307
— PWM data rate
—
2564 1667 1075
—
Note: The timing parameters are not tested but derived from the oscillator clock.
Min.
65
195
2.1
0.7
6.2
6.8
4.2
20.0
5128
Typ.
100
300
3.2
1.0
9.6
10.5
6.4
30.7
3333
Max. Units
155 µs
465 µs
5.0 ms
1.6 ms
14.9 ms
16.3 ms
9.9 ms
47.6 ms
2151 bps
© 1996 Microchip Technology Inc.
Preliminary
DS40152C-page 19