EP4SGX360FH29C3N Altera, EP4SGX360FH29C3N Datasheet - Page 536

• Manufacturer Part Number: EP4SGX360FH29C3N
• Description: IC STRATIX IV FPGA 360K 780HBGA
• Manufacturer: Altera
• Series: Stratix® IV GXr

Specifications of EP4SGX360FH29C3N

• Number Of Logic Elements/cells: 353600
• Number Of Labs/clbs: 14144
• Total Ram Bits: 22564
• Number Of I /o: 289
• Voltage - Supply: 0.87 V ~ 0.93 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 780-HBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

1–92
Figure 1–80. 8B/10B Decoder 10-Bit Control Code Group
Stratix IV Device Handbook Volume 2: Transceivers
1
The cascaded 8B/10B decoder indicates whether the decoded 16-bit code group is a
data or control code group on the 2-bit rx_ctrldetect[1:0] port. The
rx_ctrldetect[0] signal is driven high or low depending on whether decoded data
on the rx_dataout[7:0] port (LSByte) is a control or data code group, respectively.
The rx_ctrldetect[1] signals are driven high or low depending on whether decoded
data on the rx_dataout[15:8] port (MSByte) is a control or data code group,
respectively.
Figure 1–80
group into 8-bit data code group (8'hBC) driven on the rx_dataout port. The
rx_ctrldetect signal is asserted high synchronous with 8'hBC on the rx_dataout
port, indicating that it is a control code group. The rest of the codes received are data
code groups /Dx.y/.
Byte Deserializer
The FPGA fabric-transceiver interface frequency has an upper limit that is stated in
the “Interface Frequency” section in the
functional modes that have a receiver PCS frequency greater than the upper limit
stated in the
status signals cannot be forwarded directly to the FPGA fabric because it violates this
upper limit for the FPGA fabric-transceiver interface frequency. In such
configurations, the byte deserializer is required to reduce the FPGA fabric-transceiver
interface frequency to half while doubling the parallel data width. For example, at
3.2 Gbps data rate with a deserialization factor of 10, the receiver PCS datapath runs
at 320 MHz. The 10-bit parallel received data and status signals at 320 MHz cannot be
forwarded to the FPGA fabric because it violates the upper limit for the FPGA
fabric-transceiver interface frequency. The byte serializer converts the 10-bit parallel
received data at 320 MHz into 20-bit parallel data at 160 MHz before forwarding to
the FPGA fabric.
The byte deserializer is required in configurations that exceed the FPGA
fabric-transceiver interface clock upper frequency limit. It is optional in
configurations that do not exceed the FPGA fabric-transceiver interface clock upper
frequency limit.
The byte deserializer operates in two modes:
■
■
Single-width mode
Double-width mode
rx_ctrldetect[1:0]
rx_dataout[15:0]
Control Code Group Detection
datain[19:10]
datain[9:0]
shows the 8B/10B decoding of the received 10-bit /K28.5/ control code
DC and Switching Characteristics
clock
16'h8378
D24.3
D3.4
00
16'hBCBC
D28.5
D28.5
01
DC and Switching Characteristics
16'h0F0F
D15.0
D15.0
Chapter 1: Transceiver Architecture in Stratix IV Devices
chapter, the parallel received data and
00
16'h8383
D3.4
D3.4
February 2011 Altera Corporation
Transceiver Block Architecture
chapter. In