PEF22558EV11GXP Lantiq, PEF22558EV11GXP Datasheet - Page 29

• 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

and should have an attunation factor of about 1.1 (minimum of equivalent noise
bandwidth) for minimum jitter at the output. The appropriate P- and I- factors of the PLL
loop filter and registerbits of CMR3 and CMR6 are to be defined.
The corner frequencies after reset are 2 Hz and can be switched to 0.2 Hz with the
register bit LIM2.SCF for the receive direction (DCO-R)
CMR5.SCFX for the transmit direction (DCO-X) if corner frequency adjust is not enabled
by the register bit CMR2.ECFAX or CMR2.ECFAR respectively.
If corner frequency adjust is enabled it can be individually configured by using the
registers CMR3, CMR4 and CMR5.
The adaption speed can be adjusted..
Figure 19
5.6
The OctalFALC
range of 1.02 to 20 MHz supplied on pin MCLK, see
The clocking unit has two different modes:
•
Delta Sheet
In the “flexible master clocking mode” (GCM2.VFREQ_EN = ´1´) the clocking unit
has to be tuned to the selected reference frequency by setting the global clock mode
PLL Reset and Configuring
Principle of Setting Parameters of the DCO-X and DCO-R
switches
corner
frequency to
0.2 Hz in E1
sets corner
frequency to
2 Hz in E1
TM
provides a flexible clocking unit, which references to any clock in the
LIM2.SCF for DCO-R,
CMR6.SCFX for DCO-X
Reset
Table
ECFAX for DCO-X, ECFAR for DCO-R
„Corner
frequency
adjust“
P
corner
frequency
2 or 0.2 Hz
in E1
I
CFAX (for DCO-X)CFAR (for DCO-R)
DCO-R
(DCO-X)
MUX
P
I
Table
P
LIM2,
CMR6
corner
frequency
range 2 …
0.2 Hz in E1
I
MUX
P
29
I
P
CMR2
corner
frequency
range 8 …
0.2 Hz
IAX (for DCO-X)
Figure
CMR5
CMR3
I
IAR (for DCO-R)
20.
and with the register bit
OctalFALC_DCO_X_adjust_2
CMR4
DCOCOMPN
Rev. 2.0, 2005-05-03
CMR6
OctalFALC
PEF 22558 E
Clock Modes
TM