hcs362 Microchip Technology Inc., hcs362 Datasheet - Page 18

• Manufacturer Part Number: hcs362
• Description: Keeloq Code Hopping Encoder
• Manufacturer: Microchip Technology Inc.

HCS362
TABLE 4-4:
4.5.12
When PWM mode is selected the header length (low
time between preamble and data bits start) can be set
to 10 x T
for compatibility with previous K
els. In Manchester mode, the header length is fixed and
set to 4 x T
4.5.13
RFEN
disabled. If enabled, S3 is only sampled 2 s after the
last button is released and at the start of the first trans-
mission. If disabled S3 functions the same as the other
S inputs.
DS40189D-page 18
Address
selects whether the
Bit
10
11
12
13
14
15
...
E
0
1
2
9
or 3 x T
E
HEADER
RFEN
.
E
SEED_3
. The 10 x T
SEED_48
SEED_49
SEED_50
SEED_57
SEED_58
SEED_59
HEADER
RFEN
Field
...
LED
MOD
RFEN
E
mode is recommended
EE
output is enabled or
L
OQ
Seed Most Significant word
encoder mod-
RF Enable/S3 multiplexing
Modulation Format
LED output timing
Header Length
Description
Preliminary
—
0
1
0
1
0
(S3 only sensed 2 seconds after the last but-
ton is released)
1
(S3 same as other S inputs)
0
1
= V
= V
= PWM
= MANCHESTER
- Enabled
- Disabled
= short Header, T
= standard Header, T
V
V
BOT
BOT <
BOT
BOT
LED blink 200/800 ms
LED not blinking
LED blink 25/500 ms
LED blink once
<V
>V
>V
V
LOW
LOW
LOW
LOW
2002 Microchip Technology Inc.
Values
H
= 3 x T
H
= 10 x T
E
E