ACC-72EX User Manual
DPRAM Data Processing
69
Value
Definition/Description
$55AA55AA
System reset cookie
The image below illustrates the steps the host application has to perform in order to execute a systemwide
reset on the netX chip through the dual-port memory.
System Reset
Timing
The duration of the reset outlined above depends on the firmware. Typically, the NSF_READY flag is
cleared within around 100 – 500 ms after the HSF_RESET Flag was set. When cleared, the
NSF_READY bit will be set again after around 0.5 – 5 s. Generally, the reset should not take more than
6 seconds.
Channel Initialization
In order to force the protocol stack to restart and evaluate the configuration parameter again, the
application can set the APP_COS_INIT flag in the ulApplicationCOS register in the control block or send
a reset packet to the communication channel. All open network connections are interrupted immediately,
regardless of their current state. Reinitializing the channel is not allowed if the database is locked.
Changing flags in the ulApplicationCOS register requires the application also to toggle the host change of
state command flag in the host communication flags register. Only then, the netX protocol stack
recognizes the reset command.
