PEF2054NV21XK Infineon Technologies, PEF2054NV21XK Datasheet - Page 115

• Manufacturer Part Number: PEF2054NV21XK
• Manufacturer: Infineon Technologies

Specifications of PEF2054NV21XK

• Lead Free Status / Rohs Status: Compliant

pulse having a width of at most, one DCL period. Between the multiframe reset pulses,
FSC pulses with a width of at least two DCL periods must be applied. Devices which
support this option are for example the OCTAT-P (PEB 2096-H), QUAT-S
(PEB 2084-H), SBCX (PEB 2081), and the IEC-Q (PEB 2091).
FC mode 7 is a combination of FC modes 3 and 6. The timer register TIMR must be
loaded with the required multiframe period (e.g. 5 ms for the S-interface or 12 ms for the
U
FC Mode 7
FC mode 7 is intended for IOM-2 line cards to synchronize the multiframe structure
among several S- or U
started: whenever the timer expires, the frame signal has the pulse shape of FC mode 3
during one frame. For all the other frames the FSC signal has the pulse form of FC
mode 6.
After setting the CMDR:ST bit, the inverted value of TVAL is loaded to the timer and the
timer is incremented as soon as time slot 3 is passed (i.e. the FSC high phase is passed
which lasts for 4 TSs in FC mode 6) and then every 250 s.
When the timer expires (timer value = 0), an interrupt is generated immediately and the
next FSC pulse has the shape of FC mode 3.
Figure 39 illustrates this behavior for a timer value of TVAL6 … 0 = 0000001.
Figure 39
FSC Signal in FC Mode 7
Note: If the timer is stopped, the generated pulse form is the one of FC mode 6.
Timer value examples:
Required timer value for 5 ms period: TIMR:TVAL6 … 0 = 010011
Required timer value for 12 ms period: TIMR:TVAL6 … 0 = 101111
Semiconductor Group
k
-interface). When the timer is started with CMDR:ST, a cyclic multiplexing process is
CFI Frame
FSC
FC Mode 7
Timer Loaded
CMFR: ST = 1
n
k
-interface transceivers. The layer-1 multiframe is reset by an FSC
Timer
Incremented
n + 1
n
+
2
Timer
Expired
n + 3
115
n + 4
Timer
Incremented
n + 5
n + 6
B
B
Application Hints
, e.g. TIMR = 13
, e.g TIMR = 2F
Timer
Expired
n + 7
PEB 2055
PEF 2055
n + 8
ITT08054
H
H