HCS362-I Datasheet, PDF (29/38 Pages) Microchip Technology – KEELOQ Code Hopping Encoder

HCS362
TABLE 7-4: CODE WORD TRANSMISSION TIMING PARAMETERS – PWM MODE^(1,3)
VDD = +2.0V to 6.3V
Commercial (C): TAMB = 0 °C to +70 °C
Industrial
(I): TAMB = -40 °C to +85 °C
11
BSEL Value
10
01
Symbol
Characteristic
Typical
Typical
Typical
TE
Basic pulse element
800
400
200
TBP
Bit width
3
3
3
TP
Preamble duration
31
31
31
TH
Header duration⁽⁴⁾
10
10
10
TC
Data duration
207
207
207
TG
Guard time⁽²⁾
27.2
26.4
26
—
Total transmit time
220
122
74
—
Data Rate
417
833
1667
Note 1: The timing parameters are not tested but derived from the oscillator clock.
2: Assuming GUARD = 10 option selected in CONFIG_0 Configuration Word.
3: Allow for a +/- 10% tolerance on the encoder internal oscillator after calibration.
4: Assuming HEADER = 1 option selected in SEED_3 Configuration Word.
00
Typical
100
3
31
10
207
25.8
50
3334
Units
µs
TE
TE
TE
TE
ms
ms
bps
TABLE 7-5: CODE WORD TRANSMISSION TIMING PARAMETERS—MANCHESTER MODE^(1,3)
VDD = +2.0V to 6.3V
Commercial (C): TAMB = 0 °C to +70 °C
Industrial
(I): TAMB = -40 °C to +85 °C
11
BSEL Value
10
01
00
Symbol
Characteristic
Typical
Typical
Typical
Typical
TE
Basic pulse element⁽³⁾
800
400
200
TBP
Bit width
2
2
2
TP
Preamble duration
31
31
31
TH
Header duration
4
4
4
TC
Data duration
138
138
138
TG
Guard time⁽²⁾
26.8
26.4
26
—
Total transmit time
166
96
61
—
Data Rate
625
1250
2500
Note 1: The timing parameters are not tested but derived from the oscillator clock.
2: Assuming GUARD = 10 option selected in CONFIG_0 Configuration Word.
3: Allow for a +/- 10% tolerance on the encoder internal oscillator after calibration.
100
2
31
4
138
25.8
43
5000
Units
µs
TE
TE
TE
TE
ms
ms
bps
© 2002 Microchip Technology Inc.
Preliminary
DS40189D-page 29