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MAXQ7667 User’s Guide

Table 13-2. Bootloader Status Codes

STATU S VALU E FUN CTION

00 No Error. The last command comp leted successful ly.

01 Family No t Supp or ted. An attempt was made to use a command from a family the bootloader does not support.

02 Invalid C ommand. An attempt was made to use a nonexistent command within a supported command family.

N o Password Match. An attempt was made to use a password- p rotected command without first matching a vali d password.

Or, the Pass word Match command was called w ith an incorrect password value.

04 Bad Parameter. The parameter (address or otherw ise) passed to the command was out of range or otherwise invalid.

05 Verify Failed. The verification step failed on a Load/Verify or Ver ify command.

06 Unknown R egister. An attempt was made to read from or w r ite to a nonexistent reg ister.

07 W o rd Mo de No t Sup por ted. An attempt was made to set word mode access, but the bootloader supports by te mode access only.

08 Master Erase Failed. The bootloader w as unable to perform master erase.

09 N o A u t o Bau d C haracter. If no valid character (0x0D) has been received dur ing the 5s ti meout period.

10 Bad A u t o Baud Character. After three retries, if the received character d i d not have the correct number of transitions.

13.3.1 Family 0 Commands (Not Password Protected)

Command 00h—No Operation

Command 01h—Exit Loader

This command causes the bootloader command loop to exit, and execution jumps to 8000h in the UROM and from there to the appli-

cation code at 000h.

Command 02h—Master Erase

This command clears (programs to FFFFh) all words in the program flash memory.

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–003Fh. If the value matches, the password lock is cleared.

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 32 Bytes

Input

03h Password value

Output

1 2 ... 218 219 220 221 222 223 224 225 226 227 228 ... 346 347

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