Users Guide: MAXQ8913 Supplement User guide

MAXQ Family User’s Guide:
MAXQ8913 Supplement
17-4
Command 08h—Get Loader Version
Command 09h—Get Utility ROM Version
Command 0Ah—Set Word/Byte-Mode Access
The mode byte should be 0 to set byte-access mode or 1 to set word-access mode. The current access mode is
returned in the status flag byte by command 04h, as well as a flag to indicate whether word-access mode is supported
by this particular bootloader. Note: The MAXQ8913 supports byte mode only.
Command 0Dh—Get ID Information
For the MAXQ8913, the information returned by this command is a zero-terminated ROM banner string.
17.3 Family 1 Commands: Load Variable Length (Password Protected)
Command 10h—Load Code Variable Length
This command programs (Length) bytes of data into the program flash starting at byte address (AddressH:AddressL),
with the following restrictions.
• The low bit of the address is always forced to zero, since instructions in program flash must be word aligned.
• In byte mode, if an odd number of bytes is input, the final word written to the program flash has its most significant
byte set to 00h by default.
• Memory locations in flash that have previously been loaded must be erased (using the Master Erase command, the
Erase Code Fixed Length command, or the flashErasePage or flashEraseAll utility ROM routines) before they can
be loaded with a different value.
• In keeping with standard MAXQ little-endian memory architecture, the least significant byte of each word is loaded
first. For example, if one loads bytes (11h, 22h, 33h, 44h) starting at address 0000h, the first two words of program
space are written to (2211h, 4433h).
I/O BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5
Input
08h 00h 00h 00h 00h
Output
VersionL VersionH 03Eh
I/O BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5
Input
09h 00h 00h 00h 00h
Output
VersionL VersionH 03Eh
I/O BYTE 1 BYTE 2 BYTE 3 BYTE 4
Input
0Ah Mode 00h 00h
Output
03Eh
I/O BYTE 1 (VARIABLE) LAST BYTE
Input
0Dh 00h, 00h, 00h . . . 00h
Output
Device-Dependent Information 03Eh
I/O BYTE 1 BYTE 2 BYTE 3 BYTE 4
(LENGTH)
BYTES
BYTE
LENGTH+5
BYTE
LENGTH+6
Input
10h Length AddressL AddressH Data to load 00h 00h
Output
03Eh
Maxim Integrated