AVRDUDE: Terminal Mode Commands

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## 3.1 Terminal Mode Commands

The following commands are implemented:

`dump memtype addr nbytes`
  Read nbytes from the specified memory area, and display them in the usual hexadecimal and ASCII form.

`dump`
  Continue dumping the memory contents for another nbytes where the previous dump command left off.

`write memtype addr byte1 ... byteN`
  Manually program the respective memory cells, starting at address addr, using the values byte1 through byteN. This feature is not implemented for bank-addressed memories such as the flash memory of ATMega devices.

`erase`
  Perform a chip erase.

`send b1 b2 b3 b4`
  Send raw instruction codes to the AVR device. If you need access to a feature of an AVR part that is not directly supported by AVRDUDE, this command allows you to use it, even though AVRDUDE does not implement the command.

`sig`
  Display the device signature bytes.

`part`
  Display the current part settings and parameters. Includes chip specific information including all memory types supported by the device, read/write timing, etc.

`?`
`help`
  Give a short on-line summary of the available commands.

`quit`
  Leave terminal mode and thus AVRDUDE.

In addition, the following commands are supported on the STK500 programmer:

`vtarg voltage`
  Set the target's supply voltage to voltage Volts.

`varef voltage`
  Set the adjustable voltage source to voltage Volts. This voltage is normally used to drive the target's Aref input on the STK500.

`fosc freq[M|k]`
  Set the master oscillator to freq Hz. An optional trailing letter M multiplies by 1E6, a trailing letter k by 1E3.

`fosc off`
  Turn the master oscillator off.

`sck period`
  STK500 only: Set the SCK clock period to period microseconds.

  JTAG ICE only: Set the JTAG ICE bit clock period to period microseconds. Note that unlike STK500 settings, this setting will be reverted to its default value (approximately 1 microsecond) when the programming software signs off from the JTAG ICE.

`parms`
  STK500 only: Display the current voltage and master oscillator parameters.

  JTAG ICE only: Display the current target supply voltage and JTAG bit clock rate/period.

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