Intel
®
Ethernet Network Adapter E810-CQDA2T
User Guide
20 722960-002
4.3 External Connectors
External connector configuration is available only on the port that owns the PTP timer. By default, it is
Port 0.
The E810-CQDA2T has four connectors for external 1PPS signals: SMA1, SMA2, U.FL1, and U.FL2
• SMA connectors are bidirectional and U.FL are unidirectional.
• U.FL1 is 1PPS output and U.FL2 is 1PPS input.
• SMA1 and U.FL1 connectors share channel one.
• SMA2 and U.FL2 connectors share channel two.
Example:
# export ETH=enp1s0f0
echo <function> <channel> > /sys/class/net/$ETH/device/ptp/*/pins/SMA1
(SMA2,U.FL1,U.FL2)
where:
Note: If different input or output frequencies are needed, please check details in Section 4.11,
“Advanced DPLL Configuration”
Table 7. DPLL Priority List
Default
Priority
Pin
Index
EEC - DPLL0
(Frequency/Glitchless)
Frequency
PPS - DPLL1 (Phase/Glitch
Allowed)
Frequency
0 6 1PPS from GNSS (GNSS-1PPS) 1PPS 1PPS from GNSS (GNSS-1PPS) 1PPS
2 5 1PPS from SMA2 (SMA2) 1PPS 1PPS from SMA2 (SMA2) 1PPS
3 4 1PPS from SMA1 (SMA1) 1PPS 1PPS from SMA1 (SMA1) 1PPS
4 1 Reserved -- 1PPS from E810 (CVL-SDP20) 10 MHz
5 0 Reserved -- 1PPS from E810 (CVL-SDP22) 1PPS
6 -- Reserved -- Reserved --
7 -- Reserved -- Reserved --
8 2 Recovered CLK1 (C827_0-RCLKA) 1.953125 MHz Recovered CLK1 (C827_0-RCLKA) 1.953125 MHz
9 3 Recovered CLK2 (C827_0-RCLKB) 1.953125 MHz Recovered CLK2 (C827_0-RCLKB) 1.953125 MHz
10 -- OCXO 20.000 MHz OCXO 20.000 MHz
function:0 = Disabled
1 = Rx
2 = Tx
channel: 1 = SMA1 or U.FL1
2 = SMA2 or U.FL2
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