Filter
Top Products
Datasheet
79
Networking Silicon — GD82559ER
NOTE:
Input test is done with 0.1V
CC
overdrive. V
max
specifies the maximum peak-to-peak waveform allowed
for testing input timing.
10.4.2.2 PCI Timings
NOTES:
1. Timing measurement conditions are illustrated in Figure 27.
2. PCI minimum times are specified with loads as detailed in the PCI Bus Specification, Revision 2.1, Section
4.2.3.2.
3. n a PCI environment, REQ# and GNT# are point-to-point signals and have different output valid delay times
and input setup times than bussed signals. All other signals are bussed.
4. Timing measurement conditions are illustrated in Figure 28.
5. RST# is asserted and de-asserted asynchronously with respect to the CLK signal.
6. All PCI interface output drivers are floated when RST# is active.
10.4.2.3 Flash Interface Timings
The 82559ER is designed to support up to 150 nanoseconds of Flash access time. The V
PP
signal in
the Flash implementation should be connected permanently to 12 V. Thus, writing to the Flash is
controlled only by the FLWE# pin.
Table 26 provides the timing parameters for the Flash interface signals. The timing parameters are
illustrated in Figure 29.
V
step
(rising edge) 0.285V
CC
0.325V
CC
V Min Delay
0.475V
CC
V Max Delay
V
step
(falling edge) 0.615V
CC
0.475V
CC
V Min Delay
0.325V
CC
V Max Delay
V
max
0.4V
CC
0.4V
CC
V
Input Signal Edge
Rate
11V/ns
Table 24. Measure and Test Condition Parameters
Table 25. PCI Timing Parameters
Symbol Parameter Min Max Units Notes
T14 t
val
PCI CLK to Signal Valid Delay 2 11 ns 1, 2, 4
T15 t
val(ptp)
PCI CLK to Signal Valid Delay (point-
to-point)
212ns 1, 2, 4
T16 t
on
Float to Active Delay 2 ns 1
T17 t
off
Active to Float Delay 28 ns 1
T18 t
su
Input Setup Time to CLK 7 ns 4, 5
T19 t
su(ptp)
PCI Input Setup Time to CLK (point-to-
point)
10 ns 4, 5
T20 t
h
Input Hold Time from CLK 0 ns 6
T21 t
rst
Reset Active Time After Power Stable 1 ms 6
T22 T
rst-clk
PCI Reset Active Time After CLK
Stable
100 µs6
T23 T
rst-off
Reset Active to Output Float Delay 40 ns 6, 7