hcs201 Microchip Technology Inc., hcs201 Datasheet - Page 20

• Manufacturer Part Number: hcs201
• Description: Keeloq Code Hopping Encoder
• Manufacturer: Microchip Technology Inc.

HCS201
FIGURE 8-3:
FIGURE 8-4:
TABLE 8-4:
DS41098C-page 20
V
Commercial (C): Tamb = 0 C to +70 C
Industrial
Symbol
Header
DD
T
Note 1: The timing parameters are not tested but derived from the oscillator clock.
T
T
T
T
T
T
HOP
FIX
BP
E
H
G
= +3.5 to 6.0V
P
Basic pulse element
PWM bit pulse width
Preamble duration
Header duration
Hopping code duration
Fixed code duration
Guard Time
Total Transmit Time
PWM data rate
LSB
Bit 0 Bit 1
(I): Tamb = -40 C to +85 C
Encrypted Portion
Characteristic
CODE WORD TRANSMISSION TIMING REQUIREMENTS
P1
CODE WORD FORMAT: PREAMBLE/HEADER PORTION
CODE WORD FORMAT: DATA PORTION (XSER=0)
Bit 30 Bit 31 Bit 32 Bit 33 Bit 58 Bit 59
23 T
MSB
E
50% Duty Cycle Preamble
LSB
Number
of T
102
271
23
10
96
39
Serial Number
1
3
E
97.56
34.56
36.72
14.04
Min.
1.08
8.64
360
925
3.6
MSB
108.4
Typ.
38.4
40.8
15.6
400
833
1.2
9.2
4.0
All
Fixed Portion
P12
Bit 60 Bit 61 Bit 62 Bit 63 Bit 64 Bit 65
S3
119.24
Code Words Transmitted
10.56
42.24
44.88
17.16
Max.
10 T
1.32
440
757
4.4
Button Code
S0
E
Header
S1
17.28
18.36
48.78
1851
Min.
4.32
0.54
7.02
180
1.8
S2
1 out of 2
2001 Microchip Technology Inc.
1667
Bit 0 Bit 1
Typ.
19.2
20.4
54.2
200
4.6
0.6
2.0
7.8
V
Data Bits
LOW
Status
RPT
21.12
22.44
59.62
Max.
1515
0.66
5.28
8.58
220
2.2
Guard
Time
Units
bps
ms
ms
ms
ms
ms
ms
ms
s