RFHCS362AF datasheet(24/60 Pages) MICROCHIP

24 / 60 page

rfHCS362G/362F

DS41189A-page 24

Preliminary

4.5.9

XSER

If XSER is enabled a 32-bit serial number is transmit-

ted. If XSER is disabled a 28-bit serial number and a

4-bit function code are transmitted.

4.5.10

SEED[0..1]

The seed value which is transmitted on key combina-

tions (0011) and (1001) can be disabled, enabled or

enabled for a limited number of transmissions deter-

mined by the initial counter value.

In limited Seed mode, the device will output the seed if

the sync counter (Section 4.2) is from 00hex to 7Fhex.

For a counter higher than 7F, a normal hopping code

will be output.

4.5.11

SEEDC

selects between seed transmission on 0001

and 0101 (SEEDC = 0) and 0011 and 1001 (SEEDC

= 1). The delay before seed transmission is 1.6 s for

(SEEDC = 0) and 3.2 s for (SEEDC = 1).

TABLE 4-5:

SEED_3

Note:

Whenever a SEED code word is output,

the 4 function bits (Figure 3-10) will be set

to all ones [1,1,1,1].

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

PWM Header Length

= short Header, TH = 3 x TE

= standard Header, TH = 10 x TE

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