EP4SGX360FH29C3N Altera, EP4SGX360FH29C3N Datasheet - Page 480

• 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: -

1–36
Stratix IV Device Handbook Volume 2: Transceivers
The programmable pre-emphasis module in each transmit buffer boosts high
frequencies in the transmit data signal, which might be attenuated in the transmission
media. Using pre-emphasis can maximize the data opening at the far-end receiver.
The transmission line’s transfer function can be represented in the frequency domain
as a low-pass filter. Any frequency components below –3dB can pass through with
minimal loss. Frequency components greater than –3dB are attenuated. This variation
in frequency response yields data-dependant jitter and other inter-symbol
interference (ISI) effects. By applying pre-emphasis, the high-frequency components
are boosted; that is, pre-emphasized. Pre-emphasis equalizes the frequency response
at the receiver so the difference between the low-frequency and high-frequency
components is reduced, which minimizes the ISI effects from the transmission
medium. Pre-emphasis requirements increase as data rates through legacy backplanes
increase. You set the pre-emphasis settings in the ALTGX MegaWizard Plug-In
Manager.
The Stratix IV GX and GT transceivers provide three pre-emphasis taps—pre tap, first
post tap, and second post tap. The ALTGX MegaWizard Plug-In Manager provides
options to select the different values on these three taps. The pre tap sets the
pre-emphasis on the data bit before the transition. The first post tap and second post
tap set the pre-emphasis on the transition bit and the successive bit, respectively. The
pre tap and second post tap also provide inversion control, shown by negative values
on the corresponding tap settings in the ALTGX MegaWizard Plug-In Manager. The
ALTGX MegaWizard Plug-In Manager only shows the valid pre-emphasis tap values
for a selected V
The ALTGX MegaWizard Plug-In Manager provides an option to select V
Table 1–16
Table 1–16. V
A high-speed serial link can be AC-coupled or DC-coupled, depending on the serial
protocol being implemented.
In an AC-coupled link, the AC-coupling capacitor blocks the transmitter DC V
on-chip or off-chip receiver termination and biasing circuitry automatically restores
the selected V
Programmable Pre-Emphasis
Programmable Transmitter Output Buffer Power (V
Link Coupling for Stratix IV GX and GT Devices
V
AC-Coupled Links
CCH
1.4 V
1.5 V
lists the data rates for the two V
Options
CCH
CM
OD
Option Data Rates
.
and transmitter termination resistance setting.
Figure 1–33
shows an AC-coupled link.
Stratix IV GX Data Rate
600 Mbps to 8.5 Gbps
600 Mbps to 6.5 Gbps
CCH
Chapter 1: Transceiver Architecture in Stratix IV Devices
options.
CCH
)
February 2011 Altera Corporation
Stratix IV GT Data Rate
600 Mbps to 11.3 Gbps
Transceiver Block Architecture
—
CCH
.
CM
. The