DS680 Datasheet, PDF (30/36 Pages) Xilinx, Inc – Space-Grade Virtex-4QV FPGAs

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Space-Grade Virtex-4QV FPGAs: DC and Switching Characteristics
Output Clock Phase Alignment
Table 43: Output Clock Phase Alignment
Description
Symbol
Phase Offset Between CLKIN and CLKFB
CLKIN / CLKFB
Phase Offset Between Any DCM Outputs
All CLK outputs
Duty Cycle Precision
DLL outputs⁽¹⁾
DFS outputs⁽²⁾
CLKIN_CLKFB_PHASE
CLKOUT_PHASE
CLKOUT_DUTY_CYCLE_DLL^(3,4)
CLKOUT_DUTY_CYCLE_FX⁽⁴⁾
Speed Grade
-10
Units
±120
ps
±200
ps
±150
ps
±250
ps
Notes:
1. DLL Outputs are used in these instances to describe the outputs: CLK0, CLK90, CLK180, CLK270, CLK2X, CLK2X180, and CLKDV.
2. DFS Outputs are used in these instances to describe the outputs: CLKFX and CLKFX180.
3. CLKOUT_DUTY_CYCLE_DLL applies to the 1X clock outputs (CLK0, CLK90, CLK180, and CLK270) only if
DUTY_CYCLE_CORRECTION=TRUE.
4. The measured value includes the duty cycle distortion of the global clock tree.
Table 44: Miscellaneous Timing Parameters
Symbol
Description
Time Required to Achieve LOCK
T_LOCK_DLL_240
T_LOCK_DLL_120_240
T_LOCK_DLL_60_120
T_LOCK_DLL_50_60
T_LOCK_DLL_40_50
T_LOCK_DLL_30_40
T_LOCK_DLL_24_30
T_LOCK_DLL_30
T_LOCK_FX_MIN
T_LOCK_FX_MAX
T_LOCK_DLL_FINE_SHIFT
Fine Phase Shifting
FINE_SHIFT_RANGE_MS
Delay Lines
DCM_TAP_MS_MIN
DCM_TAP_MS_MAX
DLL output – Frequency range > 240 MHz⁽¹⁾
DLL output – Frequency range 120 – 240 MHz⁽¹⁾
DLL output – Frequency range 60 – 120 MHz⁽¹⁾
DLL output – Frequency range 50 – 60 MHz⁽¹⁾
DLL output – Frequency range 40 – 50 MHz⁽¹⁾
DLL output – Frequency range 30 – 40 MHz⁽¹⁾
DLL output – Frequency range 24 – 30 MHz⁽¹⁾
DLL output – Frequency range < 30 MHz⁽¹⁾
DFS outputs⁽²⁾
Multiplication factor for DLL lock time with Fine Shift
Absolute shifting range in maximum speed mode
Tap delay resolution (Min) in maximum speed mode
Tap delay resolution (Max) in maximum speed mode
Speed Grade
-10
Units
20
µs
63
µs
225
µs
325
µs
500
µs
900
µs
1250
µs
1250
µs
10
ms
10
ms
2
–
7
ns
5
ps
40
ps
DS680 (v2.0) April 12, 2010
www.xilinx.com
Product Specification
30