4.2.1. Single 25 Gbps PMA Direct Channel (with FEC) Within a Single FEC
Block
Table 40.
Single 25 Gbps PMA Direct Channel (with FEC) Within a Single FEC Block
Configuration
Data Rate
TX and RX Double Width
PMA Interface
Core Interface
25.78125 Gbps
Enabled
32 bits
64 bits
For FIFO in Phase Compensation mode, connect half rate
tx_clkout
(402.83 MHz,
that is, 25.78125 Gbps/64) to
tx_coreclkin
and
rx_coreclkin
. If you use any
other source for
tx_coreclkin
, make sure
tx_coreclkin
has 0 PPM difference
with
tx_clkout
.
Figure 51.
PMA Direct with FEC
E-Tile Native PHY IP
TX PMA
25.78125Gbps
RX PMA
FEC
FEC
E-Tile FIFO
EMIB
Native PHY IP
Core Interface
tx_clkout
402.83 MHz
TX Data
tx_coreclkin
rx_coreclkin
rx_clkout
402.83 MHz
RX Data
TX Core
FIFO
XCVR
Interface
XCVR
Interface
/2
/2
/2
E-Tile FIFO
RX Core
FIFO
Legend:
TX PMA generated parallel clock (line rate / PMA interface width)
TX PMA generated parallel clock div by 2
RX PMA generated parallel clock div by 2
RX PMA generated parallel clock (line rate / PMA interface width)
4.2.2. Single 10 Gbps PMA Direct Channel (without FEC)
Table 41.
Single 10 Gbps PMA Direct Channel Configuration
Data Rate
TX and RX Double Width
PMA Interface
Core Interface
10.3125 Gbps
Enabled
20 bits
40 bits
For FIFO in Phase Compensation mode, connect half rate
tx_clkout
(257.8125 MHz)
to
tx_coreclkin
and connect
rx_clkout
(257.8125 MHz) to
rx_coreclkin
. If
you use any other source for
tx_coreclkin
/
rx_coreclkin
, make sure
tx_coreclkin
and
rx_coreclkin
have 0 PPM difference with
tx_clkout
and
rx_clkout
, respectively
4. Clock Network
UG-20056 | 2019.02.04
Intel
®
Stratix
®
10 E-Tile Transceiver PHY User Guide
90