AMIS-49587 Datasheet, PDF (52/59 Pages) ON Semiconductor – Power Line Carrier Modem

AMIS−49587
APPENDIX D: CODING
Pre−Defined Characters
The valid one−byte values for the starting characters in the local frame are listed below :
Table 42. PRE−DEFINED CHARACTERS
Character
STX
ACK
NAK
?
Definition
Start of text
first char of frame
Acknowledgment
Non Acknowledgment
Start of Status Message
ASCII Code
02h
06h
15h
3Fh
Synchronization State Codes
The valid one−byte values for the Synchronization state codes are listed below:
Table 43. SYNCHRONIZATION STATE CODES
New Synchronization State
Primary Code
Secondary Code
Synchronization Found
01
No
Synchronization Confirmed
02
No
Synchronization Lost
04
time−out not addressed
01
time−out frame not Ok
02
time−out synchro confirm
03
Wrong Initiator
04
External Command
05
Search Initiator
06
Error Codes
The valid one−byte values for the Error_Code are listed below:
Table 44. ERROR CODES
Error Identifier
ERR_UNAVAILABLE_RESOURCE
ERR_REQUEST_NOT_ALLOWED
ERR_UNAVAILABLE_MODE
ERR_ILLEGAL_DATA_COMMAND
ERR_ILLEGAL_LOCAL_MAC_ADR
ERR_ILLEGAL_INITIATOR_MAC_ADR
ERR_UNAVAILABLE_COMMAND
Request Type
MAC
MAC
LTC/MAC
LTC/DB
LTC/DB
LTC/DB
LTC
Error_Code
11h
12h
21h
22h
23h
24h
25h
Transmission Status
The valid one−byte values for the Transmission_Status field are listed below:
Table 45. TRANSMISSION STATUS
Field Name
Value
OK
FFh
LM_TU1
00d
LM_SE
03d
LM_TU2
10d
Description
No error has been found
MA Data Confirm NEG
Resources Temporary Unavailable at the MAC sub−layer
Syntax Error at the MAC sub−layer
Command not authorised or Asic is not synchronised on the mains
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