EP4CE55F23I8L Altera, EP4CE55F23I8L Datasheet - Page 144
EP4CE55F23I8L
Manufacturer Part Number
EP4CE55F23I8L
Description
IC CYCLONE IV FPGA 55K 484FBGA
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 EP4CE55F23I8L
Number Of Logic Elements/cells
55856
Number Of Labs/clbs
3491
Total Ram Bits
2340000
Number Of I /o
324
Voltage - Supply
0.97 V ~ 1.03 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
484-FBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Gates
-
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6–36
High-Speed I/O Timing
Table 6–11. High-Speed I/O Timing Definitions
Cyclone IV Device Handbook, Volume 1
Transmitter channel-to-channel skew
Sampling window
Time unit interval
Receiver input skew margin
Input jitter tolerance (peak-to-peak)
Output jitter (peak-to-peak)
Note to
(1) The TCCS specification applies to the entire bank of differential I/O as long as the SERDES logic is placed in the logic array block (LAB) adjacent
to the output pins.
Table
6–11:
Parameter
Figure 6–20
Figure 6–20. The Output Signal with Pre-Emphasis
This section discusses the timing budget, waveforms, and specifications for
source-synchronous signaling in Cyclone IV devices. Timing for source-synchronous
signaling is based on skew between the data and clock signals.
High-speed differential data transmission requires timing parameters provided by IC
vendors and requires you to consider the board skew, cable skew, and clock jitter. This
section provides information about high-speed I/O standards timing parameters in
Cyclone IV devices.
Table 6–11
defines the parameters of the timing diagram shown in
shows the differential output signal with pre-emphasis.
(1)
TCCS
SW
TUI
RSKM
Symbol
—
—
Negative channel (n)
Positive channel (p)
The timing difference between the fastest and slowest output
edges, including t
included in the TCCS measurement.
The period of time during which the data must be valid in order
for you to capture it correctly. The setup and hold times
determine the ideal strobe position in the sampling window.
T
The TUI is the data-bit timing budget allowed for skew,
propagation delays, and data sampling window.
RSKM is defined by the total margin left after accounting for the
sampling window and TCCS. The RSKM equation is:
Allowed input jitter on the input clock to the PLL that is tolerable
while maintaining PLL lock.
Peak-to-peak output jitter from the PLL.
RSKM
SW
= T
SU
=
+ T
--------------------------------------------- -
TUI SW TCCS
hd
+ PLL jitter.
–
CO
2
variation and clock skew. The clock is
–
Chapter 6: I/O Features in Cyclone IV Devices
Description
Overshoot
Undershoot
V
OD
© December 2010 Altera Corporation
Figure
High-Speed I/O Timing
6–21.
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