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Format for Microprocessor Reply to Host

62 Command Set

Format for Microprocessor Reply to Host

There are three different types of replies that the microprocessor can make to the host as

follows:

 Acknowledge that the command was properly processed (ACK)

 Return a fault code

 Provide data that is requested by the host

This section describes each of these three types.

Unless otherwise specified, all commands return, as part of the Reply message, a status

word with an ACK or a Fault. Those commands that return a Data Reply message are

clearly shown.

Microprocessor ACK Message

Many of the commands require the microprocessor to perform a function, but do not

require the microprocessor to send data back to the host. However, since the host cannot

send a message until the microprocessor replies, an ACK is sent.

The ACK message contains no data. It returns the same OpCode that was sent originally

to the microprocessor, sets the Status Word to 0x0000 (zero) and the Data Length to

0x00 (zero).

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Thingmagic M5e-Compact Manual do Utilizador Página 62