PEF22558EV11GXP Lantiq, PEF22558EV11GXP Datasheet - Page 42

• Manufacturer Part Number: PEF22558EV11GXP
• Manufacturer: Lantiq

Specifications of PEF22558EV11GXP

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

9.4
In redundancy mode the data inputs XDI are connected together. The outputs RDO and
the signaling outputs RSIG (if used) of two channels can be connect together in the
OctalFALC
the other is active.
Both channels must be configured identically and must be supplied with the same clocks
and (transmit) data and signaling.
Switching between both channels can be done on the line side in transmit direction by a
hardware signal if the multi function pin XPA is configured as tristate input XLT by the
register bits PC1.XPC1 = ´1000b´. If one pin XPA is programmed as low active
(PC1.XPC1 = ´1110b´) and the one of the other channel as high active
(PC1.XPC1 = ´1000b´), no external inverter is necessary as shown in
switching between both channels on line side is possible using only one signal.
Switching can also be done on the line side in transmit direction by software, if setting
the register bit XPM2.XLT. The register bit value XPM2.XLT and the pin value of XPA
are logically ored. (That means if XPA is configured as low active then
tristate = XPM2.XLT or not(XPA). )
Because the register bit XPM2.XLT and the multi function pin XPA exist individually for
every channel, switching on the line side in transmit direction can be done between
channels of different or of the same OctalFALC
Switching between both channels can be done on the system side in receive direction
by using the registerbit SIC3.RRTRI and with or without selection of the multi function
port as RTDMT. If the RTDMT function is selected the values of RTDMT and
SIC3.RRTRI are logically exored. If in one of the both channels SIC3.RRTRI is set,
RTDMT is low active because of the logical exor, and if in the other channel SIC3.RRTRI
is cleared, RTDMT is low active because of the logical exor. So switching between both
channels on system side in receive direction is possible using only one signal.
By using the XLT, XLT and RTDMT function of the multi function ports and do the
appropriate programming of the bits SIC3.RRTRI, switching between both channels can
be done on the system and the line side together with only one common signal, as shown
in
Table 12
Configuration
Delta Sheet
XLT, XLT
RTDMT
Figure 27
TM
Redundancy Mode
and
also, because one of them is set constantly into tristate respectively while
Redundancy Application Using RLM Mode
Table
Figure 27
12.
Register Bits
PC1.XPC1(3:0)
PC1.RPC1(3:0) 1101
shows the application.
42
Channel 1
(active/stand-by)
1000
TM
device.
Channel 2
(stand-by/active)
1110
1101
Rev. 2.0, 2005-05-03
System Interface
OctalFALC
PEF 22558 E
Figure
27. So
TM