XC3S50A Xilinx Corp., XC3S50A Datasheet - Page 44

• Manufacturer Part Number: XC3S50A
• Description: Spartan-3a Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

DC and Switching Characteristics
Block RAM Timing
Table 34: Block RAM Timing
44
Notes:
1.
Clock-to-Output Times
T
Setup Times
T
T
T
T
Hold Times
T
T
T
T
Clock Timing
T
T
Clock Frequency
F
RCKO
RCCK_ADDR
RDCK_DIB
RCCK_ENB
RCCK_WEB
RCKC_ADDR
RCKD_DIB
RCKC_ENB
RCKC_WEB
BPWH
BPWL
BRAM
Symbol
The numbers in this table are based on the operating conditions set forth in
When reading from block RAM, the delay from the active
transition at the CLK input to data appearing at the DOUT
output
Setup time for the ADDR inputs before the active transition at
the CLK input of the block RAM
Setup time for data at the DIN inputs before the active
transition at the CLK input of the block RAM
Setup time for the EN input before the active transition at the
CLK input of the block RAM
Setup time for the WE input before the active transition at the
CLK input of the block RAM
Hold time on the ADDR inputs after the active transition at the
CLK input
Hold time on the DIN inputs after the active transition at the
CLK input
Hold time on the EN input after the active transition at the CLK
input
Hold time on the WE input after the active transition at the CLK
input
High pulse width of the CLK signal
Low pulse width of the CLK signal
Block RAM clock frequency
Description
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Table
0.32
0.28
0.69
1.12
1.56
1.56
Min
8.
–
0
0
0
0
0
-5
Max
2.06
320
Speed Grade
–
–
–
–
–
–
–
–
–
–
0.36
0.31
0.77
1.26
1.79
1.79
Min
DS529-3 (v1.5) July 10, 2007
–
0
0
0
0
0
-4
Product Specification
Max
2.49
280
–
–
–
–
–
–
–
–
–
–
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
R