WIZ127SR User’s Manual
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3.2.
Data mode and Command mode
WIZ127SR has two operation mode - serial command mode and data mode through serial
interface. These are concerned to the communication between host processor and WIZ127SR.
3.2.1.
Data mode
Data mode is the default mode of WIZ127SR. After booting, WIZ127SR operates itself as
‘Serial
to Ethernet; converter. It tries to connect or listens to
get peer’s connection request. During this
mode, WIZ127SR holds the data from host processor via serial interface as just data. If the
connection is already established, WIZ127SR transmits the data to peer system, and also
receives data which are sent by the peer from Ethernet.
In other words, WIZ127SR transparently bypasses data from Ethernet to serial interface and
vice versa without editing those data.
3.2.2.
Serial Command mode
In serial command mode, WIZ127SR treats data from host processor as a command. If the
command is valid, it sends a proper response. If not it responds with error message. In the
serial command mode, there is no data communications between WIZ127SR and peer system.
If WIZ127SR enters into serial command mode, it will print out
“<E” message through serial
interface to inform host processor that it successfully entered into serial command mode.
But when it switches
to data mode, it doesn’t print out any message.
3.2.3.
How to switch the mode
There is a method to switch the mode from data to serial or vice versa. That is using the
software triggering.
Software triggering
Host processor can make WIZ127SR enter into serial command mode by issuing software
triggering string, which is already set by user through serial interface. User can set this string by
the configuration tool, web config page or telnet.
In order to escape from serial command mode, host processor just issues <WR> command.
Then, WIZ127SR reboots and operates as data mode.
3.2.4.
How to configure WIZ127SR with a whole data
As User wants to configure WIZ127SR in one time operation, he can do it using handling the
Hardware trigger pin.
If you supply the power or reset the module with asserting low on pin 12 of JP1, you can