19.2.9.3 Monitor Answer

The Secure SAM-BA Monitor answers any command with an acknowledge message formatted as follows:

____,________,________#[<payload>]

opcode errcode length

where:

• opcode—4 characters of the command
• errcode—value of the error code
• length—in cases where the monitor must send data to SAM-BA, this field shows how much data is in the payload, thus how much data SAM-BA has to read.
• payload—optional data, depends on the command.

  Table 19-14. Command List

  Command	Full Name	Description
  CACK	SEND_CMD_ACK	Return the status of simple commands
  ASTA	SEND_APPLET_STATUS	Return the status after execution of an applet
  SVER	SEND_ROM_VERSION	Return ROM Code version

  Table 19-15. Error Code

  Error name	Hex value	Description
  secCmdOK	0x000000000	Command OK
  secCmdTooLong	0xFFFFFFFF	Whole command size too long
  secCmdOpcodeSizeErr	0xFFFFFFFE	Opcode size too long
  secCmdAddrSizeErr	0xFFFFFFFD	Address field size too long
  secCmdLenSizeErr	0xFFFFFFFC	Length field size too long
  secCmdRWSizeErr	0xFFFFFFFA	RW field size too long
  secCmdOpcodeUnknown	0xFFFFFFF9	Unknown command op-code
  secCmdCustKeyLengthErr	0xFFFFFFF8	Customer key payload message size error
  secCmdCustKeyNotWritten	0xFFFFFFF7	Customer key has not been written
  secCmdCustKeyAlreadyWritten	0xFFFFFFF6	A customer key has already been written in fuses
  secCmdCmacErr	0xFFFFFFF5	Message CMAC error
  secCmdDecryptErr	0xFFFFFFF4	Error during message decryption
  secCmdKeyDerivErr	0xFFFFFFF3	Error during key derivation
  secCmdRsaHashAlreadyWritten	0xFFFFFFEE	An RSA hash has already been written in fuses
  secCmdFuseWriteErr	0xFFFFFFED	Error while writing a fuse bit
  secCmdExpandModeAlreadyWritten	0xFFFFFFEC	Field EXPAND_MODE in the Boot Configuration word has already been programmed