Data Sheet

ISM4343 Specification
DOC-DS-20074-5.3
Inventek Systems
Page 17
6.3.4 SPI Data Phase:
The Data Phase indicates the eS-WiFi module has data ready for the Host to read. The eS-WiFi
module will raise CMD/DATA READY and the Host will initiate a SPI cycle (lower SSN) and
clock out 0x0A (Line Feed) until the CMD/DATA READY pin lowers signaling the end of the
Data Phase.
6.3.5 SPI Asynchronous Messages:
There are certain situations in which the eS-WiFi will issue asynchronous messages:
• Soft AP (AO/AD Commands), when a device connects to the Soft AP a DHCP assigned
message will issued.
Ex. [DHCP ] Assigned 00:00:00:00:00:00 has 192.168.10.100
• TCP/UDP Communication Servers (P5=1), when a client connects to the server a
connected message will be issued.
Ex. [TCP SVR] Waiting on connection...
[TCP SVR] Accepted 192.168.10.100:2000
[UDP SVR] Accepted 192.168.10.100:2000
With the SPI host interface being synchronous the Host must poll for these messages. This can
be done by using the MR (Message Read) command or when a Communication connection the
issuing of a R0 command will read all asynchronous message and the result of the R0 command.
The asynchronous messages are delineated by the Start Of Message Asynchronous ([SOMA])
and End of Message Asynchronous ([EOMA]) markers.