R
Platform Flash In-System Programmable Configuration PROMS
AC Characteristics Over Operating Conditions When Cascading
OE/RESET
CE
CLK
CLKOUT
(optional)
DATA
Last Bit
T
CDF
T
CODF
T
OCE
T
OOE
First Bit
T
OCK
T
COCE
CEO
ds123_23_102203
XCF01S, XCF02S,
XCF04S
Symbol
T
CDF
XCF08P, XCF16P,
XCF32P
Min
-
-
-
-
-
-
-
-
-
-
-
-
Description
CLK to output float delay
(2,3)
when V
CCO
= 2.5V or 3.3V
CLK to output float delay
(2,3)
when V
CCO
= 1.8V
Min
-
-
-
-
-
-
-
-
-
-
-
-
Max
25
35
20
35
20
35
20
35
-
-
-
-
Max
20
20
20
20
80
80
80
80
20
20
25
25
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
T
OCK
CLK to CEO delay
(3,5)
when V
CCO
= 2.5V or 3.3V
CLK to CEO delay
(3,5)
when V
CCO
= 1.8V
CE to CEO delay
(3,6)
when V
CCO
= 2.5V or 3.3V
CE to CEO delay
(3,6)
when V
CCO
= 1.8V
OE/RESET to CEO delay
(3)
when V
CCO
= 2.5V or 3.3V
OE/RESET to CEO delay
(3)
when V
CCO
= 1.8V
CLKOUT to CEO delay when V
CCO
= 2.5V or 3.3V
CLKOUT to CEO delay when V
CCO
= 1.8V
CLKOUT to output float delay
when V
CCO
= 2.5V or 3.3V
CLKOUT to output float delay when V
CCO
= 1.8V
T
OCE
T
OOE
T
COCE
T
CODF
Notes:
1. AC test load = 50 pF for XCF01S/XCF02S/XCF04S; 30 pF for XCF08P/XCF16P/XCF32P.
2. Float delays are measured with 5 pF AC loads. Transition is measured at ±200 mV from steady state active levels.
3. Guaranteed by design, not tested.
4. All AC parameters are measured with V
IL
= 0.0V and V
IH
= 3.0V.
5. For cascaded PROMs, if the FPGA’s dual-purpose configuration data pins are set to persist as configuration pins, the minimum period is increased
based on the CLK to CEO and CE to data propagation delays:
- T
CYC
minimum = T
OCK
+ T
CE
+ FPGA Data setup time.
- T
CAC
maximum = T
OCK
+ T
CE
6. For cascaded PROMs, if the FPGA’s dual-purpose configuration data pins become general I/O pins after configuration; to allow for the disable to
propagate to the cascaded PROMs and to avoid contention on the data lines following configuration, the minimum period is increased based on the
CE to CEO and CE to data propagation delays:
- T
CYC
minimum = T
OCE
+ T
CE
- T
CAC
maximum = T
OCK
+ T
CE
DS123 (v2.6) March 14, 2005
Preliminary Product Specification
32
XILINX [ XILINX, INC ]
