Maxim Integrated MAXQ7667 - Manual (Page 224)

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MAXQ7667 User’s Guide
Command 04h—Get Status
The status code returned by this command is defined in Table 13-2. The flags byte contains the following bit status flags.
I/O Byte 1 Byte 2
Input 04h
Output Flags Status Code
Command 05h—Get Supported Commands
The SupportL (LSB) and SupportH (MSB) bytes form a 16-bit value that indicates which command families this bootloader supports.
If bit 0 is set to 1, it indicates that Family 0 is supported. If bit 1 is set to 1, it indicates that Family 1 is supported, and so on.
The CodeLen and DataLen bytes return the fixed block lengths used by the Load/Dump/Verify Fixed Length commands for code and
data space, respectively. Fixed length is not supported if it returns.
Command 06h—Get Code Size
This command returns SizeH:SizeL, which represents the size of available code memory in words minus 1. If this command is unsup-
ported, the return value will be 0000h meaning “unknown amount of memory.”
Command 07h—Get Data Size
This command returns SizeH:SizeL, which represents the size of available data memory in words minus 1. If this command is unsup-
ported, the return value will be 0000h meaning “unknown amount of memory.”
FLAG BIT FUNCTION
0
Password Lock
0 = The password is unlocked or had a default value; password-protected commands can be used.
1 = The password is locked. Password-protected commands cannot be used.
1
Word/Byte Mode
0 = The bootloader is currently in byte mode for memory reads/writes.
1 = The bootloader is currently in word mode for memory reads/writes.
2
Word/Byte Mode Supported
0 = The bootloader supports byte mode only.
1 = The bootloader supports word mode as well as byte mode.
3 to 8 Reserved
Table 13-3. Bootloader Status Flags
I/O Byte 1 Byte 2 Byte 3 Byte 4
Input 05h
Output SupportL SupportH CodeLen DataLen
I/O Byte 1 Byte 2
Input 06h
Output SizeL SizeH
I/O Byte 1 Byte 2
Input 07h
Output SizeL SizeH