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Flash Download Commands
3255 4073–002 10–3
Flash Download Command Descriptions
These commands control downloading of flash memory. The printer returns
either ACK or NAK to the host computer when each command is received:
• ACK (hexadecimal 06)
Sent when the printer has received a host transmission and has completed the
request successfully.
• NAK (hexadecimal 15)
Sent when a request is unsuccessful.
The commands are listed in numerical order according to their hexadecimal
codes. Each command is described and the hexadecimal, decimal, and ASCII
codes are listed.
Put the Printer in Flash Download Mode
Puts the printer in flash download mode in preparation to receive commands
controlling the downloading of objects into flash memory. When this command
is received, the printer leaves normal operation and can no longer print
transactions until the Reboot the Printer command (1D FF) is received or the
printer is rebooted.
This command does not affect the current communication parameters. It is
available in all emulations. Once the printer is in flash download mode, this
command is no longer available.
Note: See “Entering Flash Download Mode” in section 3 to put the printer
in flash download mode using the DIP switches.
Hexadecimal Decimal ASCII
1B 5B 7D 27 91 125 ESC [ }
Request Printer Identification
Requests string containing printer identification. This command is not
implemented and is ignored if received.
Hexadecimal Decimal ASCII
1D 00 29 0 GS NUL