PEF2054NV21XK Infineon Technologies, PEF2054NV21XK Datasheet - Page 206

• Manufacturer Part Number: PEF2054NV21XK
• Manufacturer: Infineon Technologies

Specifications of PEF2054NV21XK

• Lead Free Status / Rohs Status: Compliant

MFAIR to MFSAR in order to point the MF handler to that particular channel. With an
empty MFFIFO the transmit + receive same time slot command can be executed to
initiate the reception of the monitor message. The EPIC will then autonomously
acknowledge each received byte and report the end of the transfer by an ISTA:MFFI
interrupt. The P can read the message from the MFFIFO and, if required, execute a
new MF Search command.
Search For Active Monitor Channels Command
In IOM-2 applications the monitor channel is sometimes used for low speed data
transfers over the S and Q channels of an S interface or over the EOC channel of a U
(2B1Q) interface. The layer-1 transceivers (SBCX PEB 2081, IEC-Q PEB 2091) may
then, upon reception of a new message, start a monitor channel communication with the
EPIC.
For those applications where a slave device initiates an MF channel transfer, the EPIC
has implemented the “Search For Active Monitor Channels Command”.
The active handshake protocol (OMDR:MFPS = 1) must be selected for this function.
When the “MF Search On” command (CMDR:MFSO = 1) is executed, the EPIC
searches for active handshake bits (MX) on all upstream monitor channels. As soon as
an active channel is found, an ISTA:MAC interrupt is generated, the search is stopped,
and the address of this channel is stored in MFAIR. The P can then copy the value of
Note: The search should only be started when no receive transfer is in operation,
Once started, the search for active monitor channels can only be stopped when such a
channel has been found or when the Control Memory is reset or initialized
(OMDR:OMS0 = 0).
Semiconductor Group
otherwise each received byte will lead to the ISTA:MAC interrupt.
206
Application Hints
PEB 2055
PEF 2055