AMD Geode™ SC2200 Processor Data Book 391
Electrical Specifications 32580B
9.3.5 PCI Bus Interface
The SC2200 is compliant with PCI bus v2.1 specification.
Relevant information from the PCI bus specification is pro-
vided below.
All parameters in Table 9-23 are not 100% tested. The
parameters in this table are further described in Figure 9-
13.
Figure 9-12. Testing Setup for Slew Rate and Minimum TimingTable 9-18. PCI AC Specifications
Symbol Parameter Min Max Unit Comments
IOH(AC)
(Note 1)
Switching current high -12VIO mA 0 < VOUT 0.3VIO,
-17.1(VIO-VOUT)mA0.3V
IO < VOUT < 0.9VIO
Equation A
(Figure 9-13)
0.7VIO < VOUT < VIO
Test point (Note 2) -32VIO mA VOUT = 0.7VIO
IOL(AC)
(Note 1)
Switching current low 16VIO mA VIO > VOUT 0.6VIO
26.7VOUT mA 0.6VIO > VOUT > 0.1VIO
Equation B
(Figure 9-13)
0.18VIO>VOUT>0
Test point (Note 2) 38VIO mA VOUT = 0.18VIO
ICL Low clamp current -25+(VIN+1)/0.015 mA -3 < VIN < -1
ICH High clamp current 25+(VIN-VIO-1)/0.015 mA VIO+4 > VIN > VIO+1
SLEWR
(Note 3)
Output rise slew rate 1 4 V/ns 0.2VIO - 0.6VIO Load
SLEWFOutput fall slew rate 1 4 V/ns 0.6VIO - 0.2VIO Load
Note 1. Refer to the V/I curves in Figure 9-13. This specification does not apply to PCICLK0, PCICLK1, and PCIRST#
which are system outputs.
Note 2. Maximum current requirements are met when drivers pull beyond the first step voltage. Equations which define
these maximum values (A and B) are provided with relevant diagrams in Figure 9-13. These maximum values are
guaranteed by design.
Note 3. Rise slew rate does not apply to open-drain outputs. This parameter is interpreted as the cumulative edge rate
across the specified range, according to the test circuit in Figure 9-12.
Buffer VCC
0.5" max.
Pin
1 KΩ1 KΩ10 pF
Output