Datasheet
Artix-7 FPGAs Data Sheet: DC and AC Switching Characteristics
DS181 (v1.21) September 27, 2016 www.xilinx.com
Product Specification 31
F
MAX_CAS_WF_NC
Block RAM cascade (write
first, no change mode)
when cascade but not in
RF mode
467.07 418.59 345.78 345.78 345.78 273.30 MHz
F
MAX_CAS_RF_
PERFORMANCE
Block RAM cascade (read
first, performance mode)
when in cascade with RF
mode and no possibility of
address overlap/one port
is disabled
467.07 418.59 345.78 345.78 345.78 273.30 MHz
F
MAX_CAS_RF_
DELAYED_WRITE
When in cascade RF
mode and there is a
possibility of address
overlap between port A
and port B
405.35 362.19 297.35 297.35 297.35 226.60 MHz
F
MAX_FIFO
FIFO in all modes without
ECC
509.68 460.83 388.20 388.20 388.20 315.66 MHz
F
MAX_ECC
Block RAM and FIFO in
ECC configuration
410.34 365.10 297.53 297.53 297.53 215.38 MHz
Notes:
1. The timing report shows all of these parameters as T
RCKO_DO
.
2. T
RCKO_DOR
includes T
RCKO_DOW
, T
RCKO_DOPR
, and T
RCKO_DOPW
as well as the B port equivalent timing parameters.
3. These parameters also apply to synchronous FIFO with DO_REG = 0.
4. T
RCKO_DO
includes T
RCKO_DOP
as well as the B port equivalent timing parameters.
5. These parameters also apply to multirate (asynchronous) and synchronous FIFO with DO_REG = 1.
6. T
RCKO_FLAGS
includes the following parameters: T
RCKO_AEMPTY
, T
RCKO_AFULL
, T
RCKO_EMPTY
, T
RCKO_FULL
, T
RCKO_RDERR
, T
RCKO_WRERR.
7. T
RCKO_POINTERS
includes both T
RCKO_RDCOUNT
and T
RCKO_WRCOUNT.
8. The ADDR setup and hold must be met when EN is asserted (even when WE is deasserted). Otherwise, block RAM data corruption is possible.
9. These parameters include both A and B inputs as well as the parity inputs of A and B.
10. T
RCO_FLAGS
includes the following flags: AEMPTY, AFULL, EMPTY, FULL, RDERR, WRERR, RDCOUNT, and WRCOUNT.
11. RDEN and WREN must be held Low prior to and during reset. The FIFO reset must be asserted for at least five positive clock edges of the
slowest clock (WRCLK or RDCLK).
Table 30: Block RAM and FIFO Switching Characteristics (Cont’d)
Symbol Description
Speed Grade
Units1.0V 0.95V 0.9V
-3 -2/-2LE -1 -1Q/-1M -1LI -2LE