參數(shù)資料
型號: XA3S700A-4FGG484I
廠商: Xilinx Inc
文件頁數(shù): 39/57頁
文件大小: 0K
描述: IC FPGA SPARTAN-3A 700K 484-FBGA
產(chǎn)品培訓(xùn)模塊: Extended Spartan 3A FPGA Family
標(biāo)準(zhǔn)包裝: 60
系列: Spartan®-3A XA
LAB/CLB數(shù): 1472
邏輯元件/單元數(shù): 13248
RAM 位總計(jì): 368640
輸入/輸出數(shù): 372
門數(shù): 700000
電源電壓: 1.14 V ~ 1.26 V
安裝類型: 表面貼裝
工作溫度: -40°C ~ 100°C
封裝/外殼: 484-BBGA
供應(yīng)商設(shè)備封裝: 484-FBGA
XA Spartan-3A Automotive FPGA Family Data Sheet
DS681 (v2.0) April 22, 2011
Product Specification
44
Phase Shifter
Lock Time
LOCK_FX(2,3)
The time from deassertion at the
DCM’s Reset input to the rising
transition at its LOCKED output.
The DFS asserts LOCKED when
the CLKFX and CLKFX180
signals are valid. If using both the
DLL and the DFS, use the longer
locking time.
5MHz
F
CLKIN 15 MHz
All
–5
ms
FCLKIN 15 MHz
–450
s
Notes:
1.
The numbers in this table are based on the operating conditions set forth in Table 8 and Table 37.
2.
DFS performance requires the additional logic automatically added by ISE 9.1i and later software revisions.
3.
For optimal jitter tolerance and faster lock time, use the CLKIN_PERIOD attribute.
4.
Maximum output jitter is characterized within a reasonable noise environment (40 SSOs and 25% CLB switching) on an FPGA. Output jitter
strongly depends on the environment, including the number of SSOs, the output drive strength, CLB utilization, CLB switching activities,
switching frequency, power supply and PCB design. The actual maximum output jitter depends on the system application.
5.
The CLKFX and CLKFX180 outputs always have an approximate 50% duty cycle.
6.
Some duty-cycle and alignment specifications include a percentage of the CLKFX output period. For example, the data sheet specifies a
maximum CLKFX jitter of “±[1% of CLKFX period + 200]”. Assume the CLKFX output frequency is 100 MHz. The equivalent CLKFX period
is 10 ns and 1% of 10 ns is 0.1 ns or 100 ps. According to the data sheet, the maximum jitter is ±[100 ps + 200 ps] = ±300 ps.
Table 39: Recommended Operating Conditions for the PS in Variable Phase Mode
Symbol
Description
Speed Grade: -4
Units
Min
Max
Operating Frequency Ranges
PSCLK_FREQ (FPSCLK)
Frequency for the PSCLK input
1
167
MHz
Input Pulse Requirements
PSCLK_PULSE
PSCLK pulse width as a percentage of the PSCLK period
40%
60%
Table 40: Switching Characteristics for the PS in Variable Phase Mode
Symbol
Description
Phase Shift Amount
Units
Phase Shifting Range
Maximum allowed number of
DCM_DELAY_STEP(3) steps for a
given CLKIN clock period, where
T = CLKIN clock period in ns. If using
CLKIN_DIVIDE_BY_2 = TRUE,
double the clock effective clock
period.
CLKIN
60 MHz
[INTEGER(10 (T
CLKIN – 3 ns))]
steps
CLKIN
60 MHz [INTEGER(15 (T
CLKIN – 3 ns))]
FINE_SHIFT_RANGE_MIN
Minimum guaranteed delay for variable phase shifting
[MAX_STEPS
DCM_DELAY_STEP_MIN]
ns
FINE_SHIFT_RANGE_MAX Maximum guaranteed delay for variable phase shifting
[MAX_STEPS
DCM_DELAY_STEP_MAX]
ns
Notes:
1.
The numbers in this table are based on the operating conditions set forth in Table 8 and Table 39.
2.
The maximum variable phase shift range, MAX_STEPS, is only valid when the DCM is has no initial fixed phase shifting, that is, the
PHASE_SHIFT attribute is set to 0.
3.
The DCM_DELAY_STEP values are provided at the bottom of Table 36.
Table 38: Switching Characteristics for the DFS (Cont’d)
Symbol
Description
Device
Speed Grade: -4
Units
Min
Max
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