XC2V8000-5BF957C Xilinx, Inc., XC2V8000-5BF957C Datasheet - Page 39

• Manufacturer Part Number: XC2V8000-5BF957C
• Description: Virtex-II 1.5V Field-Programmable Gate Array
• Manufacturer: Xilinx, Inc.

Virtex-II 1.5V Field-Programmable Gate Arrays
Operating Modes
The frequency ranges of DCM input and output clocks
depend
low-frequency mode or high-frequency mode, according to
Table
Table 23: DCM Frequency Ranges
Locations/Organization
Virtex-II DCMs are placed on the top and bottom of each
block RAM and multiplier column. The number of DCMs
depends on the device size, as shown in
Table 24: DCM Organization
Module 2 of 4
32
CLK0, CLK180
CLK90, CLK270
CLK2X, CLK2X180
CLKDV
CLKFX, CLKFX180
XC2V40
XC2V80
XC2V250
XC2V500
XC2V1000
XC2V1500
XC2V2000
XC2V3000
XC2V4000
XC2V6000
XC2V8000
Output Clock
23. (For actual values, see
Device
on
the
operating
CLKIN_FREQ_DLL_LF
CLKIN_FREQ_DLL_LF
CLKIN_FREQ_DLL_LF
CLKIN_FREQ_DLL_LF
CLKIN_FREQ_FX_LF
Columns
CLKIN Input
2
2
4
4
4
4
4
6
6
6
6
mode
Virtex-II Switching Char-
Low-Frequency Mode
Table
specified,
DCMs
24.
12
12
12
12
CLKOUT_FREQ_1X_LF
CLKOUT_FREQ_1X_LF
CLKOUT_FREQ_2X_LF
CLKOUT_FREQ_DV_LF
CLKOUT_FREQ_FX_LF
4
4
8
8
8
8
8
either
www.xilinx.com
CLK Output
1-800-255-7778
acteristics). The CLK2X, CLK2X180, CLK90, and CLK270
outputs are not available in high-frequency mode.
High or low-frequency mode is selected by an attribute.
CLKIN_FREQ_DLL_HF
CLKIN_FREQ_DLL_HF
CLKIN_FREQ_FX_HF
CLKIN Input
NA
NA
High-Frequency Mode
DS031-2 (v1.8) October 12, 2001
Advance Product Specification
CLKOUT_FREQ_1X_HF
CLKOUT_FREQ_DV_HF
CLKOUT_FREQ_FX_HF
CLK Output
NA
NA
R