RFHCS362G_11 Datasheet, PDF (45/54 Pages) Microchip Technology – KEELOQ® Code Hopping Encoder with UHF ASK/FSK Transmitter

rfHCS362G/362F
FIGURE 10-3:
PWM FORMAT SUMMARY (MOD=0)
1
16
31 TE Preamble
3/10
TE
Header
Encrypted
Portion
LOGIC "0"
LOGIC "1"
TE TE TE
TBP
Fixed Code
Portion
Guard
Time
FIGURE 10-4:
PWM PREAMBLE/HEADER FORMAT (MOD=0)
P1
P16
Bit 0 Bit 1
31xTE 50% Duty Cycle Preamble
3 or 10xTE Header Data Bits
TABLE 10-4: CODE WORD TRANSMISSION TIMING PARAMETERS – PWM MODE^(1,3)
VDD = +2.0V to 6.3V
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
© 2011 Microchip Technology Inc.
DS41189B-page 45