HCS360_01 Datasheet, PDF (21/28 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
Basic pulse element
1
260 400 620
1
TBP
PWM bit pulse width
3
780 1200 1860
3
TP
Preamble duration
32
8.3 12.8 19.8
32
TH
Header duration
10
2.6 4.0 6.2
10
THOP
Hopping code duration
96
25.0 38.4 59.5
96
TFIX
Fixed code duration
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.
130
390
4.2
1.3
12.5
13.7
4.2
35.8
2564
Typ.
200
600
6.4
2.0
19.2
21.0
6.4
55.0
1667
Max. Units
310 µs
930 µs
9.9 ms
3.1 ms
29.8 ms
32.6 ms
9.9 ms
85.3 ms
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.
155
465
5.0
1.6
14.9
16.3
9.9
47.6
2151
Units
µs
µs
ms
ms
ms
ms
ms
ms
bps
 2001 Microchip Technology Inc.
DS40152D-page 21