Maxim Integrated MAXQ Family Users Guide: MAXQ8913 Supplement - Manual (Page 55)

MAXQ Family User’s Guide:
MAXQ8913 Supplement
17-2
17.2 Family 0 Commands (Not Password Protected)
Command 00h—No Operation
Command 01h—Exit Loader
This command causes the bootloader command loop to exit. Upon exit, the MAXQ8913 clears the SPE bit and resets
itself internally. Following the internal reset, execution jumps to the beginning of application code at address 0000h.
Command 02h—Master Erase
This command erases (programs to FFFFh) all words in the program flash memory and writes all words in the data
SRAM to zero. After this command completes, the password lock bit is automatically cleared, allowing access to all
bootloader commands.
Command 03h—Password Match
This command accepts a 32-byte password value, which is matched against the password in program memory (in byte
mode) from addresses 0020h to 003Fh. If the value matches, the password lock is cleared.
Command 04h—Get Status
The status code returned by this command is defined in Table 17-1. The flags byte contains the bit status flags as
shown in Table 17-2.
I/O BYTE 1
Input 00h
Output
I/O BYTE 1
Input 01h
Output
I/O BYTE 1
Input 02h
Output
I/O BYTE 1 BYTES 2 TO 33 BYTE 34 BYTE 35
Input 03h 32-Byte Password Value 00h 00h
Output 03Eh
I/O BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5
Input 04h 00h 00h 00h 00h
Output Flags Status Code 03Eh
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