EP4CE40F29C7N Altera, EP4CE40F29C7N Datasheet - Page 297
EP4CE40F29C7N
Manufacturer Part Number
EP4CE40F29C7N
Description
IC CYCLONE IV E FPGA 40K 780FBGA
Manufacturer
Altera
Series
CYCLONE® IV Er
Datasheets
1.EP4CGX15BN11C8N.pdf
(44 pages)
2.EP4CGX15BN11C8N.pdf
(14 pages)
3.EP4CGX15BN11C8N.pdf
(478 pages)
4.EP4CGX15BN11C8N.pdf
(10 pages)
Specifications of EP4CE40F29C7N
Number Of Logic Elements/cells
39600
Number Of Labs/clbs
2475
Total Ram Bits
1134000
Number Of I /o
532
Voltage - Supply
1.15 V ~ 1.25 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 85°C
Package / Case
780-FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Other names
544-2685
Available stocks
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Quantity
Price
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Part Number:
EP4CE40F29C7N
Manufacturer:
ALTERA
Quantity:
852
Part Number:
EP4CE40F29C7N
Manufacturer:
ALTERA/阿尔特拉
Quantity:
20 000
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Chapter 1: Cyclone IV Transceivers Architecture
Receiver Channel Datapath
Figure 1–18. Word Aligner Configured in Bit-Slip Mode
© December 2010 Altera Corporation
rx_patterndetect
rx_dataout[7..0]
rx_datain7..0]
rx_clkout
rx_bitslip
1
1
Bit-Slip Mode
In bit-slip mode, the rx_bitslip port controls the word aligner operation. At every
rising edge of the rx_bitslip signal, the bit-slip circuitry slips one bit into the
received data stream, effectively shifting the word boundary by one bit. When the
received data after bit-slipping matches the programmed word alignment pattern, the
rx_patterndetect signal is driven high for one parallel clock cycle.
You can implement a bit-slip controller in the user logic that monitors either the
rx_patterndetect signal or the receiver data output (rx_dataout), and controls
the rx_bitslip port to achieve word alignment.
Figure 1–18
this example, consider that 8'b11110000 is received back-to-back and
16'b0000111100011110 is specified as the word alignment pattern. A rising edge on the
rx_bitslip signal at time n + 1 slips a single bit 0 at the MSB position, forcing the
rx_dataout to 8'b01111000. Another rising edge on the rx_bitslip signal at time n
+ 5 forces rx_dataout to 8'b00111100. Another rising edge on the rx_bitslip signal
at time n + 9 forces rx_dataout to 8'b00011110. Another rising edge on the
rx_bitslip signal at time n + 13 forces the rx_dataout to 8'b00001111. At this
instance, rx_dataout in cycles n + 12 and n + 13 is 8'b00011110 and 8'b00001111,
respectively, which matches the specified 16-bit alignment pattern
16'b0000111100011110. This results in the assertion of the rx_patterndetect signal.
Automatic Synchronization State Machine Mode
In automatic synchronization state machine mode, the word aligner achieves
synchronization after receiving a specific number of synchronization code groups,
and falls out of synchronization after receiving a specific number of erroneous code
groups. This mode provides hysteresis during link synchronization, which is required
by protocols such as PCIe, GbE, XAUI, and Serial RapidIO.
This mode is only supported using the 8B/10B encoded data with 10-bit input to the
word aligner.
11110000
n
shows an example of the word aligner configured in bit-slip mode. For
n + 1 n + 2 n + 3 n + 4 n + 5 n + 6 n + 7
01111000
11110000
00111100
n + 8 n + 9 n + 10 n + 11 n + 12 n + 13 n + 14
00011110
Cyclone IV Device Handbook, Volume 2
00001111
1–17
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