INFICON STM-2XM 2-Channel Rate/Thickness Monitor - Manual (Page 92)

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STM-2XM Operating Manual
5.5.3.1 Optional Serial Command Format
<STX><ADDR><CMD_RSP>[<DATA>...]<SRLNO><ACKSM1><ACKSM2><CR>
SRLNO. . . . . . . . . . . . . . . . . . . . . . . Serial Number
Associates a command from the master with
the correct response. The value must be
greater than or equal to 0x10 (16) in order to
not be mistaken as a framing or escape
character byte.
ACKSM1, 2 . . . . . . . . . . . . . . . . . . . Alternate 0x40 based checksum characters
This has a range of values from @ (0x40)
through the letter, O (0x4f).
NOTE: Refer to section 5.5.2.1 on page 5-6 for additional information identifying
the bytes in this command string.
5.5.3.2 Additional Option to Serial Command
Opcode 0x10 BOOT_API is a reserved SMDP opcode. This divides the
communication response of STM-2XM into two sections, bootloader and
application. A platform that is in the bootloader operational mode will only respond
to BOOT_API opcode commands, and will ignore all others making the instrument
invisible to standard communications interrogations.
Opcode 0x10 BOOT_API hides platforms waiting in bootloader mode from general
network polls and interrogations. Special bootloader aware host code must use the
BOOT_API hooks to open the platform and make it suitable for erasing and
downloading new applications code, scanning for existing applications, and
launching existing applications.