HCS360-SN datasheet(11/24 Pages) MICROCHIP

11 / 24 page

HCS360

Preliminary

DS40152C-page 11

FIGURE 4-1:

TRANSMISSION FORMAT—MANCH = 0

FIGURE 4-2:

TRANSMISSION FORMAT—MANCH = 1

FIGURE 4-3:

CODE WORD ORGANIZATION (RIGHT-MOST BIT IS CLOCKED OUT FIRST)

LOGIC "1"

Code Word

Guard

Time

Preamble

Sync

Encrypted

TX Data

Fixed Code

Data

BIT

LOGIC "0"

3 5 7 9

4 6 8 10

CODE WORD:

TOTAL TRANSMISSION:

Preamble Sync Encrypt

Fixed

Guard

1 CODE WORD

1 2

4 5

Preamble Sync

Encrypt

13 14 15

Guard

Time

Preamble

Sync

Encrypted

Data

Fixed Code

Data

LOGIC "0"

BPW

CODE WORD:

TOTAL TRANSMISSION:

Sync

Encrypt

Fixed

Guard

1 CODE WORD

1 2

4 5 6

Preamble

Sync

Encrypt

13 14 15

LOGIC "1"

Start bit

Stop bit

CODE WORD

Preamble

Fixed Code Data

Encrypted Code Data

67 bits

of Data

Transmitted

MSB

LSB

CRC

(2 bit)

VLOW

(1 bit)

Button

Status

(4 bits)

28-bit

Serial Number

Button

Status

(4 bits)

Discrimination

bits

(12 bits)

16-bit

Synch Value

CRC

(2 bit)

VLOW

bit

Serial Number and

Button Status (32 bits)

32 bits of Encrypted Data

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