MAC-SA5X USER’S GUIDE
2019 Microchip Technology Inc.
DS50002938A-page
47
Appendix B. Legacy Command Set (SA.3Xm)
This section describes the commands used in the Legacy MAC product: SA.3Xm. They
have been carried forward to the SA5X product to accommodate legacy applications.
These compatibility commands do not follow the aforementioned C3 command syntax;
the response syntax is unique to each command. When a compatibility command is
received, the Microchip SA5X serial command processor enters “compatibility mode.”
An escape character ‘\’ is required to escape the mode before issuing any further C3
commands.
Generally, these commands are considered inferior to the C3 commands and are not
recommended for new designs. All of the old commands may be used with the new
product and will have the same intended functionality. However, you may see some
minor changes in the MAC response to these commands (such as string length or addi-
tional data fields).
Any serial port terminal emulator program can be used to communicate with the MAC.
B.1
LEGACY COMMAND STRUCTURE
The legacy SA.3Xm communication protocol supports the following types of com-
mands:
• Single keystroke: A carriage return is not required.
• Multiple keystroke: Requires a specific start (<) and end (>) character. Used for
commands that require arguments. A carriage return is not required. All multiple
keystroke commands return confirmation strings describing what action they have
taken.
The MAC communicates exclusively with “printable” ASCII characters.
All commands produce a response from the MAC, which are human readable, with indi-
vidual lines ending in a carriage return/line feed sequence. If an unsupported or
improperly formatted command is received, the MAC responds with "?" followed by a
carriage return/line feed sequence.
Note:
The remainder of this document abbreviates “carriage return/line feed” as
“[CRLF]”.
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