GW80314GSSL7NK Datasheet, PDF (71/88 Pages) Intel Corporation – Intel® GW80314 I/O Companion Chip

Intel® GW80314 I/O Companion Chip
Electrical Specifications
4.4
4.4.1
Targeted AC Specifications
The following section details the AC specifications for GW80314 signal interfaces.
PCI/X Clock Signal Timings
Table 29. PCI/X Clock Timings
Symbol
Parameter
PCI-X
Min.
Max.
PCI
Min.
Max.
Units Notes
T_F1
T_C1
T_CH1
T_CL1
T_SR1
PCI clock Frequency
PCI clock Cycle Time
PCI clock High Time
PCI clock Low Time
PCI clock Slew Rate
50
133
25
7.5
20
15
3
-
6
3
-
6
1
6
1
Spread Spectrum Requirements
66
MHz 1,2
40
ns
1,3
-
ns
-
ns
6
V/ns
4
f_MOD
PCI clock modulation frequency
30
33
30
33
kHz
f_spread PCI clock frequency spread
-1
0
-1
0
%
NOTES:
1. The clock frequency may not change beyond the spread-spectrum limits except while SFN_RST# is asserted.
2. The PCI output clock is limited to SFN_CLK, SFN_CLK/2, SFN_CLK/4.
3. The minimum clock period must not be violated for any single clock cycle, i.e., accounting for all system jitter.
4. This slew rate must be met across the minimum peak-to-peak portion of the clock waveform.
Table 30. DDR SDRAM Clock Timings
Symbol
Parameter
T_F2
T_C2
T_CH2
T_CL2
T_CS2
T_skew2
DDR SDRAM clock Frequency
DDR SDRAM clock Cycle Time
DDR SDRAM clock High Time
DDR SDRAM clock Low Time
DDR SDRAM clock Period Stability
DDR SDRAM clock skew for SD_CLK[2:0] and
SD_CLK#[3:0]
PC 266
Min.
66
10
4.5
4.5
-
-
Max.
100
-
5.5
5.5
+/-90
240
Units
MHz
ns
ns
ns
ps
ps
Datasheet
71