Table 2-1 N1 SoC clocks (continued)
Clock
Source
Default
frequency
Description
SENSORCLK
SYSPLL
100MHz
Sensor clock
SCPNICLK
300MHz
SCP NIC-400 clock.
SCPQSPICLK
50MHz
SCP QSPI reference clock
SCPI2CCLK
50MHz
SCP I2C clock
MCPNICCLK
300MHz
MCP NIC-400 clock.
MCPQSPICLK
50MHz
MCP QSPI reference clock
MCPI2CCLK
50MHz
MCP I2C clock
PCIEAXICLK
1.2GHz
PCIe AXI clock
PCIEAPBCLK
200MHz
PCIe APB clock
CCIXAPBCLK
200MHz
CCIX APB clock
SYSAPBCLK
120MHz
System expansion APB peripherals
TMIF2xCLK
120MHz
IOFPGA TMIF 2× clock
TSIF2xCLK
120MHz
IOFPGA TSIF 2× clock
CCIXAXICLK
1.2GHz
CCIX AXI clock
TRACECLKA
TPIU
10MHz
Trace clocks to connector
TRACECLKB
PMCLK
OSC5, REFCLK
25MHz
Power management clock for PCIe and CCIX
CFG_F2S_CLK
MCC
10MHz
Serial Configuration Controller (SCC) interface clock. This
clock is a data strobe, not a free running clock.
TMIF_CLKI
IOFPGA TLX
‑
400
master interface
80MHz
Thin Links-based AXI master interface clock received from
IOFPGA with incoming data from IOFPGA.
TMIF_CLKO
N1 SoC TLX
‑
400
master interface
75MHz
Thin Links-based AXI master interface clock exported from
N1 SoC with data transmitted from N1 SoC to IOFPGA.
TSIF_CLKI
IOFPGA TLX
‑
400
slave interface
80MHz
Thin Links-based AXI slave interface clock received from
IOFPGA with incoming data from IOFPGA.
TSIF_CLKO
N1 SoC TLX
‑
400
slave interface
75MHz
Thin Links-based AXI slave interface clock exported from
N1 SoC with data transmitted from N1 SoC to IOFPGA.
PCIE_CMN_REFCLK
Clock buffer
100MHz
Fixed differential reference clock for PCIe U-PHY
CCIX_CMN_REFCLK
Clock buffer
100MHz
Fixed differential reference clock for CCIX U-PHY
CXSCLK
CCIX PCIe PHY
1GHz
CXLA clock in CMN-600
2.4.3
Clock programming and control
The
Serial Configuration Control
(SCC) clock control registers in the N1 SoC control the clock
frequencies by modifying the clock PLLs and dividers.
The PLLs generate the internal clocks from the board OSC clock generators according to the formula:
2 Hardware description
2.4 Clocks
101489_0000_02_en
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