HCS362 datasheet(18/46 Pages) MICROCHIP

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HCS362

DS40189E-page 18

TABLE 4-4:

SEED_3

4.5.12

HEADER

When PWM mode is selected the header length (low

time between preamble and data bits start) can be set

to 10 x TE or 3 x TE. The 10 x TE mode is recommended

for compatibility with previous KEELOQ encoder mod-

els. In Manchester mode, the header length is fixed and

set to 4 x TE.

4.5.13

RFEN

selects whether the RFEN output is enabled or

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.

Bit

Address

Field

Description

Values

SEED_48

Seed Most Significant word

—

SEED_49

SEED_50

...

SEED_57

SEED_58

SEED_59

LED

LED output timing

= VBOT>VLOW

LED blink 200/800 ms

VBOT<VLOW

LED not blinking

= VBOT>VLOW

LED blink 25/500 ms

VBOT<VLOW

LED blink once

MOD

Modulation Format

= PWM

= MANCHESTER

RFEN

RF Enable/S3 multiplexing

- Enabled

(S3 only sensed 2 seconds after the last but-

ton is released)

- Disabled

(S3 same as other S inputs)

HEADER

Header Length

= short Header, TH = 3 x TE

= standard Header, TH = 10 x TE

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