Datasheet
Spartan-7 FPGAs Data Sheet: DC and AC Switching Characteristics
DS189 (v1.2) June 20, 2017 www.xilinx.com
Preliminary Product Specification 30
T
RDCK_DI_ECC_FIFO
/
T
RCKD_DI_ECC_FIFO
DIN inputs with FIFO ECC in standard
mode.
(8)
1.15/0.59 1.32/0.64 1.32/0.64 ns, Min
T
RCCK_INJECTBITERR
/
T
RCKC_INJECTBITERR
Inject single/double bit error in ECC
mode.
0.64/0.37 0.74/0.40 0.74/0.40 ns, Min
T
RCCK_EN
/T
RCKC_EN
Block RAM enable (EN) input. 0.39/0.21 0.45/0.23 0.45/0.23 ns, Min
T
RCCK_REGCE
/
T
RCKC_REGCE
CE input of output register. 0.29/0.15 0.36/0.16 0.36/0.16 ns, Min
T
RCCK_RSTREG
/
T
RCKC_RSTREG
Synchronous RSTREG input. 0.32/0.07 0.35/0.07 0.35/0.07 ns, Min
T
RCCK_RSTRAM
/
T
RCKC_RSTRAM
Synchronous RSTRAM input. 0.34/0.43 0.36/0.46 0.36/0.46 ns, Min
T
RCCK_WEA
/T
RCKC_WEA
Write enable (WE) input (block RAM
only).
0.48/0.19 0.54/0.20 0.54/0.20 ns, Min
T
RCCK_WREN
/
T
RCKC_WREN
WREN FIFO inputs. 0.46/0.35 0.47/0.43 0.47/0.43 ns, Min
T
RCCK_RDEN
/
T
RCKC_RDEN
RDEN FIFO inputs. 0.43/0.35 0.43/0.43 0.43/0.43 ns, Min
Reset Delays
T
RCO_FLAGS
Reset RST to FIFO flags/pointers.
(9)
0.98 1.10 1.10 ns, Max
T
RREC_RST
/T
RREM_RST
FIFO reset recovery and removal
timing.
(10)
2.07/–0.81 2.37/–0.81 2.37/–0.81 ns, Max
Maximum Frequency
F
MAX_BRAM_WF_NC
Block RAM (write first and no change
modes) when not in SDP RF mode.
460.83 388.20 388.20 MHz
F
MAX_BRAM_RF_
PERFORMANCE
Block RAM (read first, performance
mode) when in SDP RF mode but no
address overlap between port A and
port B.
460.83 388.20 388.20 MHz
F
MAX_BRAM_RF_
DELAYED_WRITE
Block RAM (read first, delayed write
mode) when in SDP RF mode and there
is possibility of overlap between port A
and port B addresses.
404.53 339.67 339.67 MHz
F
MAX_CAS_WF_NC
Block RAM cascade (write first, no
change mode) when cascade but not in
RF mode.
418.59 345.78 345.78 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.
418.59 345.78 345.78 MHz
Table 30: Block RAM and FIFO Switching Characteristics (Cont’d)
Symbol Description
V
CCINT
Operating Voltage and Speed
Grade
Units
1.0V 0.95V
-2 -1 -1L