Maxim-integrated MAXQ20-Based Microcontroller Bootloader Command Re Bedienungsanleitung PDF herunterladen (Seite 17)

MAXQ20-Based Microcontroller Bootloader Command Reference

Family F Commands—Device Specific Commands

Family F commands are device-specific so only one command of a given command code will be supported per

device. The applicable user’s guide has details on which commands are supported for that device.

Command F0h—Get Context

Byte1

Byte2

Byte3

Input

F1h

00h

Output

Context

03Eh

This command returns the current context setting

00h: System Context

01h: User Loader Context

02h: User Application Context

Command F1h—Set Permanent Loader Lockout

Byte1

Byte2

Byte3

Byte4

Byte5

Byte6

Input

F1h

50h

4Ch

4Fh

00h

Output

03Eh

This command disables the bootloader and debug functions of the device upon exiting the bootloader. Once the

bootloader has been exited, the only way to remove the loader lockout is for the user application to erase the last

page of flash under application software control.

Command F1h—Set Context

Byte1

Byte2

Byte3

Byte4

Input

F1h

Context

00h

Output

03Eh

This command sets the context for program memory and verification.

00h: System Context

01h: User Loader Context

02h: User Application Context

Command F1h—Set Code Lock Bit

Byte1

Byte2

Byte3

Byte4

Byte5

Input

F1h

00h

Output

03Eh

This command sets the code lock bit and the password lock bit. All bootloader commands (except for those in

Family 0) are locked out. The Password Match command will not unlock the part. The Master erase command will

erase the part, clear the code lock bit and allow the part to be reprogrammed.

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