MAR28140FD Ver la hoja de datos (PDF) - Dynex Semiconductor

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MAR28140FD

Packet Telecommand Decoder

Dynex Semiconductor 

MA28140

GRO UP

GRO UP 1

GRO UP 2

GRO UP 3

CO NTRO L CO MMAND

IDENTIFIER (8 BITS)

0000 0000

CO MMAND NAME

DUMMY

0000 0101

SELECT FIXED KEY

0000 0110

SELECT PRO GRAMMABLE KEY

0000 0111

0000 1001

0000 1010

LO AD FIXED KEY IN PRO GRAMMABLE KEY MEMO RY

SET NEW LAC CO UNT VALUE

CHANGE PRO GRAMMABLE KEY BLO CK A

0000 1011

CHANGE PRO GRAMMABLE KEY BLO CK B

Table 2: List of Authentication Control Commands

1 octet

Segment Header

11111111

1 octet

Control Command Identifier

00000***

Group 1 Control Command, 11 Octets

9 octets

Authentication Tail

LAC+Signature

1 octet

Segment Header

11111111

1 octet

Control Command

Identifier

00001001

Group 2 Control Command, 15 Octets

4 octets

LAC value to be set

9 octets

Authentication Tail

LAC ID 2 bits LAC Count 30 bits LAC + Signature

1 octet

Segment Header

11111111

1 octet

Control Command

Identifier

0000101*

1 octet

7 octets

Start Address of Key specific pattern

new 40 bit Keyblock to be encoded

9 octets

Authentication Tail

LAC+Signature

Group 3 Control Command, 19 Octets

Table 3: Formats of Authentication Control Commands (Full TC Segment)

19/72

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