19.2.9.2 Command Format

The commands are formatted as follows:

____,________,________,________,__#

opcode addrxx length not_used rw

where:

• opcode—4 characters of the command.
• addr—the address field is max 8 characters long, and contains the hexadecimal address value without '0x'.
• length—in case of a write command, this field indicates the size of the data to be sent, in hexadecimal, without '0x'.
• not_used—this field is not used for the moment.
• rw—indicates a read or write operation (00 for read, 01 for write).

  Table 19-10. Simple Commands

  Command	Full Name	Description
  SEMB	SET_EXT_MEM_BOOT_EN	Set external memory boot enable
  SKIF	SET_KEYS_IN_FUSE	Set keys in fuse
  SPAI	SET_PAIRING_MODE	Set Pairing mode
  SMDI	SET_MONITOR_DIS	Set monitor disable
  SBSD	SET_BSCR_DIS	Set BSCR disable
  SSBD	SET_SEC_DBG	Set secure debug
  SJTD	SET_JTAG_DIS	Set JTAG disable fuse bit
  CRST(1)	CHIP_RESET	Reset the chip

  Note:

  1. USB communication is cut when this command is executed by the chip.

  Table 19-11. Read Version Command

  Command	Full Name	Description
  RVER	READ_ROM_VERSION	Read ROM code version

  Table 19-12. Key Management Commands

  Command	Full Name	Description
  WCKY	WRITE_CUSTOMER_KEY	Send customer keys and initialization vector (640 bits)
  WRHA	WRITE_RSA_HASH	Send RSA hash of root certificate public key

  Note: Sending the commands in the table above automatically configures the corresponding values in the SIGN_MODE and EXPAND_MODE fields of the Boot Configuration Word.

  Table 19-13. Applet Related Commands

  Command	Full Name	Description
  SAPT	SEND_APPLET	Send memory programming applet
  SMBX	SEND_APPLET_MAILBOX	Send applet mailbox content
  RMBX	READ_APPLET_MAILBOX	Read applet mailbox content
  EAPP	APPLET_EXECUTE	Execute apple
  SFIL	SEND_FILE	Send file (to be programmed into an external memory)
  RFIL	READ_FILE	Read file from an external memory