XQ2V1000-4BG575N Xilinx Inc, XQ2V1000-4BG575N Datasheet - Page 27

• Manufacturer Part Number: XQ2V1000-4BG575N
• Description: FPGA 650MHZ CMOS1.5V 575-P
• Manufacturer: Xilinx Inc
• Series: QPro™ Virtex™-IIr

Specifications of XQ2V1000-4BG575N

• Number Of Labs/clbs: 1280
• Total Ram Bits: 737280
• Number Of I /o: 328
• Number Of Gates: 100000
• Voltage - Supply: 1.425 V ~ 1.575 V
• Mounting Type: Surface Mount
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 575-BBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Logic Elements/cells: -
• Other names: Q5801737

3-State Buffers
Introduction
Each Virtex-II CLB contains two 3-state drivers (TBUFs)
that can drive on-chip buses. Each 3-state buffer has its
own 3-state control pin and its own input pin.
Each of the four slices have access to the two 3-state buffers
through the switch matrix, as shown in
neighboring CLBs can access slice outputs by direct
connects. The outputs of the 3-state buffers drive horizontal
routing resources used to implement 3-state buses.
X-Ref Target - Figure 28
X-Ref Target - Figure 29
DS122 (v2.0) December 21, 2007
Product Specification
Figure 28: Virtex-II 3-State Buffers
R
Switch
Matrix
Slice
Slice
TBUF
TBUF
S1
S0
Figure 29: 3-State Buffer Connection to Horizontal Lines
Switch
CLB-II
matrix
DS031_37_060700
Figure
Slice
Slice
S3
S2
28. TBUFs in
Programmable
connection
www.xilinx.com
The 3-state buffer logic is implemented using AND-OR logic
rather than 3-state drivers, so that timing is more predictable
and less load dependent especially with larger devices.
Locations/Organization
Four horizontal routing resources per CLB are provided for
on-chip 3-state buses. Each 3-state buffer has access
alternately to two horizontal lines, which can be partitioned as
shown in
SelectRAM memory and multiplier or I/O blocks are skipped.
Number of 3-State Buffers
Table 15
each Virtex-II device. The number of 3-state buffers is twice
the number of CLB elements.
Table 15: Virtex-II 3-State Buffers
XQ2V1000
XQ2V3000
XQ2V6000
Switch
matrix
CLB-II
Device
shows the number of 3-state buffers available in
Figure
29. The switch matrices corresponding to
3-State Buffers
QPro Virtex-II 1.5V Platform FPGAs
per Row
3 - state lines
DS031_09_032700
112
176
64
of 3-State Buffers
Total Number
16,896
2,560
7,168
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