XC4VFX20 XILINX [Xilinx, Inc], XC4VFX20 Datasheet - Page 32

• Manufacturer Part Number: XC4VFX20
• Description: DC and Switching Characteristics
• Manufacturer: XILINX [Xilinx, Inc]

Block RAM and FIFO Switching Characteristics
Table 40: Block RAM Switching Characteristics
DS302 (v3.2) April 10, 2008
Product Specification
Notes:
1.
2.
3.
4.
5.
Sequential Delays
Setup and Hold Times Before Clock CLK
Maximum Frequency
T
T
T
T
T
T
T
T
F
F
CLK-to-CLK
A Zero “0” Hold Time listing indicates no hold time or a negative hold time. Negative values cannot be guaranteed “best-case,” but if a “0” is listed,
there is no positive hold time.
T
T
T
Xilinx block RAMs do not have asynchronous inputs on an enabled port address. During the time that a port is enabled, its addresses must be stable
during the specified set-up time. Do not create an asynchronous input on an enabled port address.
RCKO_DORA
RCKO_DOA
RCCK_ADDR
RDCK_DI
RCCK_EN
RCCK_REGCE
RCCK_SSR
RCCK_WE
MAX
MAX
RCKO_DORA
RCKO_DOA
RCKO_DI
Symbol
R
/
includes both A and B inputs as well as the parity inputs of A and B.
/
T
/
T
/
includes T
T
RCKD_DI
T
includes T
/
RCKC_EN
RCKC_WE
RCKC_SSR
T
/
T
RCKC_ADDR
RCKC_REGCE
RCKO_DOPA
RCKO_DOWA
as well as the B port equivalent timing parameters.
Clock CLK to DOUT output (without output register)
Clock CLK to DOUT output with ECC
(without output register)
Clock CLK to DOUT output (with output register)
Clock CLK to DOUT output with ECC (with output
register)
ADDR inputs
DIN inputs
EN input
CE input of output register
RST input
WEN input
Write first and no change mode
Read first mode
Read first mode
, T
RCKO_DOPAR
(5)
(4)
, and T
Description
RCKO_DOPAW
www.xilinx.com
Virtex-4 FPGA Data Sheet: DC and Switching Characteristics
as well as the B port equivalent timing parameters.
(3)
(2)
500.00
500.00
500.00
1.65
3.00
0.72
2.00
0.34
0.26
0.18
0.26
0.41
0.26
0.25
0.26
0.25
0.26
0.59
0.26
-12
Speed Grade
450.45
450.45
450.45
1.83
3.33
0.80
2.20
0.37
0.28
0.20
0.28
0.45
0.28
0.27
0.28
0.27
0.28
0.65
0.28
-11
400.00
400.00
400.00
2.10
3.83
0.92
2.50
0.43
0.33
0.23
0.33
0.52
0.33
0.32
0.33
0.32
0.33
0.75
0.33
-10
ns, Max
ns, Max
ns, Max
ns, Min
ns, Min
ns, Min
ns, Min
ns, Min
ns, Min
ns, Min
Units
MHz
MHz
MHz
32