XC3000 Xilinx Corp., XC3000 Datasheet - Page 59

• Manufacturer Part Number: XC3000
• Description: XC3000 Field Programmable Gate Array
• Manufacturer: Xilinx Corp.

XC3100L CLB Switching Characteristics Guidelines
Testing of the switching parameters is modeled after testing methods specified by MIL-M-38510/605. All devices are 100%
functionally tested. Since many internal timing parameters cannot be measured directly, they are derived from benchmark
timing patterns. The following guidelines reflect worst-case values over the recommended operating conditions. For more
detailed, more precise, and more up-to-date timing information, use the values provided by the timing calculator and used
in the simulator.
Notes: 1. The CLB K to Q delay (T
November 9, 1998 (Version 3.1)
Combinatorial Delay
Sequential delay
Set-up time before clock K
Hold Time after clock K
Clock
Reset Direct (RD)
Global Reset (RESET Pad)
Clock k to outputs X or Y
Clock k to outputs X or Y when Q is returned
Logic Variables A, B, C, D, E, to outputs X or Y
through function generators F or G to drive X or Y
Logic Variables
Data In
Enable Clock
Reset Direct Inactive
Logic Variables
Data In
Enable Clock
Clock High time
Clock Low time
Max. flip-flop toggle rate
RD width
delay from RD to outputs X or Y
RESET width (Low)
delay from RESET pad to outputs X or Y
2. T
In hold time requirement (T
specifications for the XC3100L family increase by 0.35 ns (-3) and 0.29 ns (-2).
ILO
, T
R
QLO
and T
Description
ICK
are specified for 4-input functions. For 5-input functions or base FGM functions, each of these
A, B, C, D, E
DI
EC
RD
A, B, C, D, E
DI
EC
(XC3142L)
CKO
CKDI
, #8) of any CLB, plus the shortest possible interconnect delay, is always longer than the Data
, #5) of any CLB on the same die.
XC3000 Series Field Programmable Gate Arrays
11
12
13
1
8
2
4
6
3
5
7
9
Speed Grade
Symbol
T
T
T
T
T
T
T
T
T
F
T
T
T
T
T
ECCK
CKEC
T
DICK
CKDI
MRW
CKO
RPW
MRQ
QLO
CLK
ICK
CKI
RIO
ILO
CH
CL
12.0
Min
270
2.1
1.4
2.7
1.0
0.9
0.7
1.6
1.6
2.7
0
-3
Max
12.0
2.7
2.1
4.3
3.1
Advance
12.0
Min
325
1.8
1.3
2.5
1.0
0.9
0.7
1.3
1.3
2.3
0
-2
Max
12.0
2.2
1.7
3.5
2.7
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
7-61
7