MA28140 Datasheet, PDF (19/72 Pages) Dynex Semiconductor – Packet Telecommand Decoder

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)
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