Intel Cyclone 10 GX User Manual page 312

5.3.2.4.1. 8B/10B Decoder Control Code Encoding
Figure 204. 8B/10B Decoder in Control Code Group Detection
When the PCS-PMA Interface Width is 10 Bits
TX
datain[9:0]
RX
dataout[7:0]
When the PCS-PMA Interface Width is 20 Bits
TX
datain[19:10]
datain[9:0]
rx_datak[1:0]
RX
dataout[15:0]
The 8B/10B decoder indicates whether the decoded 8-bit code group is a data or
control code group on
control code groups (/Kx.y/) specified in the IEEE 802.3 specification,
driven high. If the received 10-bit code group is a data code group (/Dx.y/),
rx_datak
5.3.2.4.2. 8B/10B Decoder Running Disparity Checker Feature
Running disparity checker resides in 8B/10B decoder module. This checker checks the
current running disparity value and error based on the rate match output.
rx_runningdisp
disparity errors, respectively.
5.3.2.5. Pseudo-Random Binary Sequence (PRBS) Checker
Note: Refer to the PRBS Checker section in the Enhanced PCS Architecture chapter.
Related Information
Cyclone 10 GX Enhanced PCS Architecture
5.3.2.6. Byte Deserializer
The byte deserializer allows the transceiver to operate at data rates higher than those
supported by the FPGA fabric. It deserializes the recovered data by multiplying the
data width two or four times, depending upon the deserialization mode selected. The
byte deserializer is optional in designs that do not exceed the FPGA fabric interface
frequency upper limit. You can bypass the byte deserializer by disabling it in the
Quartus Prime Transceiver Native PHY. The byte deserializer operates in disabled,
deserialize x2, or deserialize x4 modes.
® ®
Intel Cyclone 10 GX Transceiver PHY User Guide
312
tx_clkout
D3.4 D24.3
rx_datak
83 78
tx_clkout
D3.4 D28.5
D24.3 K28.5
00 01
16'h8378 16'hBCBC
rx_datak
is driven low.
and
rx_disperr
5. Cyclone 10 GX Transceiver PHY Architecture
D28.5 K28.5 D15.0
BC BC 0F
D15.0 D3.4 D3.4
D15.0 D3.4 D24.3
00 00
16'h0F0F 16'h8383 16'h8378
. If the received 10-bit code group is one of the 12
indicate positive or negative disparity and
on page 283
UG-20070 | 2018.09.24
D0.0 D31.5 D3.4
00 BF 83
D28.5 D15.0 D3.4
K28.5 D15.0 D3.4
01 00
16'hBCBC 16'h0F0F 16'h8383
rx_datak
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