NXP Semiconductors QorIQ LX2160A - Page 26

Si5341B-
Dxxxxx -
GM
CLK8
CLK0
48 MHz
XA
XB
LX2160A
Si52208
PCIe slots
CLK_SLOTn_[P,N]
SLOT[1:2]_PRESENT_B
100 MHz
HCSL
2
SSON
CFG_SPREAD
from CPLD
CFG_CLKEN_SLOT[1:2]_B
from CPLD
100 MHz
HCSL
2
OE
PRSNT_SLOT[1:2]_B
to CPLD
SD2_CLK[F,S]_[P,N]
SD3_CLK[F,S]_[P,N]
2
100 MHz
HCSL
SD1_CLKF_[P,N]
161.1328125 MHz
HCSL
SD1_CLKS_[P,N]
161.1328125 MHz
HCSL
CLK4
100.00 MHz
HCSL
SYSCLK_DIFF_[P,N]
CLK1A
100.00 MHz
LVCMOS
CLK1B
100.00 MHz
LVCMOS
DDRCLK
CLK7A
125.00 MHz
LVCMOS
CLK7B
125.00 MHz
LVCMOS
EC_GTX_CLK
IEEE header
CLK9
156.250 MHz
HCSL
CS4223 40 GbE PHY
CLK2
100.00 MHz
HCSL
AQR107 10 GbE PHY #1
CLK3
100.00 MHz
HCSL
AQR107 10 GbE PHY #2
CLK5
25.00 MHz
HCSL
IN112525 25 GbE PHY
Figure 2-6. LX2160ARDB clock architecture
All the clocks are fixed frequency, and most are produced by the Si5341B or Si52208.
The following table summarizes the specifications of each clock and the component that
provides it.
Clocks
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 0, 09/2018
26 NXP Semiconductors