Silicon Laboratories SI2493/57/34/15/04 Program RAM write this command is used to upload firmware

AN93

	Table 39. Basic AT Command Set (Continued)
Command		Action
		Program RAM write: this command is used to upload firmware
		supplied by Silicon Labs to the ISOmodem. The format for this
		command is AT:Phhhh,xxxx,yyyy,.... where hhhh is the first
:P		address in hexadecimal, and xxxx,yyyy,.... is data in hexadecimal.
		Only one :P command is allowed per AT command line. No other
		command can be concatenated in the :P command line. This com-
		mand is only for use with special files provided by Silicon Labora-
		tories. Do not attempt to use this command for any other purpose.
		Use &T6 to display checksum for patch verification.
:Q		:Qaaaa reads hexadecimal address aaaa. Returns hexadecimal
		data value dddd. Only one command per line.
		U-register read—This command reads U-register values in hexa-
		decimal.
:R		The format is AT:Rhh, where
		hh = A particular U-register address in hexadecimal.
		The AT:R command displays all U-register values.
		Only one :R command is allowed per AT command line.
		U-register write—This command writes to the 16-bit U registers.
		The format is AT:Uhh,xxxx,yyyy,zzzz,..., where
		hh = user-access address in hexadecimal.
:U		xxxx = data in hexadecimal to be written to location hh.
		yyyy = data in hexadecimal to be written to location (hh + 1).
		zzzz = data in hexadecimal to be written to location (hh + 2).
		etc.
		Only one :U command is allowed per AT command line.
:W		:Waaaa,dddd writes hexadecimal data value dddd to hexadecimal
		data address aaaa. Only one command per line.

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