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394
AMD Geode™ SC2200 Processor Data Book
Electrical Specifications
32580B
Figure 9-15. Load Circuits for Maximum Time Measurements
Table 9-20. PCI Timing Parameters
Symbol
Parameter
Min
Max Unit
Comments
t
VAL
PCICLK to signal valid delay (on the bus)
2
11
ns
Note 1, Note 2
t
VAL
(ptp)
PCICLK to signal valid delay (GNT#)
2
9
ns
Note 1, Note 2
t
ON
Float to active delay
2
ns
Note 1, Note 3,
t
OFF
Active to float delay
28
ns
Note 1, Note 3,
t
SU
Input setup time to PCICLK (on the bus)
7
ns
Note 4
t
SU
(ptp)
Input setup time to PCICLK (REQ#)
6
ns
Note 4
t
H
Input hold time from PCICLK
0
ns
Note 4
t
RST
PCIRST# active time after power stable
1
ms
Note 3, Note 5
t
RST-CLK
PCIRST# active time after PCICLK stable
100
µs
Note 3, Note 5
t
RST-OFF
PCIRST# active to output float delay
40
ns
Note 3, Note 5, Note 6
Note 1. See the timing measurement conditions in Figure 9-16.
Note 2. Minimum times are evaluated with same load used for slew rate measurement (as shown in note 3 of Table ); max-
imum times are evaluated with the load circuits shown in Figure 9-15, for high-going and low-going edges respec-
tively.
Note 3. Not 100% tested.
Note 4. See the timing measurement conditions in Figure 9-17.
Note 5. PCIRST# is asserted and de-asserted asynchronously with respect to PCICLK (see Figure 9-18).
Note 6. All output drivers are asynchronously floated when PCIRST# is active.
Output
Buffer
Output
Buffer
V
CC
25
Ω
25
Ω
10 pF
10 pF
0.5" max.
0.5" max.
Pin
t
VAL
(Max) Rising Edge
t
VAL
(Max) Falling Edge
Содержание Geode SC2200
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