EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 119

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

Chapter 6: I/O Features in Cyclone IV Devices
OCT Support
On-Chip Series Termination Without Calibration
© December 2010 Altera Corporation
f
Cyclone IV devices support driver impedance matching to match the impedance of
the transmission line, which is typically 25 or 50 . When used with the output
drivers, OCT sets the output driver impedance to 25 or 50 . Cyclone IV devices also
support I/O driver series termination (R
Figure 6–4
shown is the intrinsic transistor impedance.
Figure 6–4. Cyclone IV Devices R
All I/O banks and I/O pins support impedance matching and series termination.
Dedicated configuration pins and JTAG pins do not support impedance matching or
series termination.
R
pins to enable R
values can reside in the same I/O bank as long as their V
Impedance matching is implemented using the capabilities of the output driver and is
subject to a certain degree of variation, depending on the process, voltage, and
temperature.
For more information about tolerance specification, refer to the
Datasheet
S
OCT is supported on any I/O bank. V
chapter.
shows the single-ended I/O standards for OCT without calibration. The R
S
OCT in a given I/O bank. I/O standards that support different R
Driver Series Termination
Cyclone IV Device
S
OCT Without Calibration
V
GND
CCIO
R
R
S
S
S
CCIO
= 50 ) for SSTL-2 and SSTL-18.
and V
Z
O
REF
must be compatible for all I/O
CCIO
Receiving
Cyclone IV Device Handbook, Volume 1
Device
and V
Cyclone IV Device
REF
do not conflict.
6–11
S
S