Kintex-7 FPGAs Data Sheet: DC and Switching Characteristics
DS182 (v1.1) April 1, 2011
Advance Product Specification
41
Clock Buffers and Networks
Table 41: Global Clock Switching Characteristics (Including BUFGCTRL)
Symbol
Description
Speed Grade
Units
-3
-2
-1
-1L
CE pins Setup/Hold
0.10/
0.04
0.12/
0.05
0.15/
0.05
ns
S pins Setup/Hold
0.10/
0.04
0.12/
0.05
0.15/
0.05
ns
BUFGCTRL delay from I0/I1 to O
0.08
0.09
0.11
ns
Maximum Frequency
FMAX_BUFG
Global clock tree (BUFG)
710
625
MHz
Notes:
1.
TBCCCK_CE and TBCCKC_CE must be satisfied to assure glitch-free operation of the global clock when switching between clocks. These
parameters do not apply to the BUFGMUX primitive that assures glitch-free operation. The other global clock setup and hold times are
optional; only needing to be satisfied if device operation requires simulation matches on a cycle-for-cycle basis when switching between
clocks.
2.
TBGCKO_O (BUFG delay from I0 to O) values are the same as TBCCKO_O values.
Table 42: Input/Output Clock Switching Characteristics (BUFIO)
Symbol
Description
Speed Grade
Units
-3
-2
-1
-1L
TBIOCKO_O
Clock to out delay from I to O
1.14
1.29
1.52
ns
Maximum Frequency
FMAX_BUFIO
I/O clock tree (BUFIO)
800
650
MHz
Table 43: Regional Clock Buffer Switching Characteristics (BUFR)
Symbol
Description
Speed Grade
Units
-3
-2
-1
-1L
TBRCKO_O
Clock to out delay from
I to O
0.77
0.87
1.03
ns
TBRCKO_O_BYP
Clock to out delay from I to O with Divide Bypass
attribute set
0.39
0.44
0.53
ns
TBRDO_O
Propagation delay from CLR to O
0.67
0.76
0.89
ns
Maximum Frequency
Regional clock tree (BUFR)
575
484
345
MHz
Notes:
1.
The maximum input frequency to the BUFR is the BUFIO FMAX frequency.
Table 44: Horizontal Clock Buffer Switching Characteristics (BUFH)
Symbol
Description
Speed Grade
Units
-3
-2
-1
-1L
TBHCKO_O
BUFH delay from I to O
0.07
0.09
0.11
ns
TBHCCK_CE/TBHCKC_CE
CE pin Setup and Hold
0.09/
0.05
0.11/
0.05
0.14/
0.06
ns
Maximum Frequency
FMAX_BUFH
Horizontal clock buffer (BUFH)
710
625
MHz