Electrical Specifications

32580B

9.3.5

PCI Bus Interface

 

The SC2200 is compliant with PCI bus v2.1 specification.

All parameters in Table 9-23are not 100% tested. The

Relevant information from the PCI bus specification is pro-

parameters in this table are further described in Figure 9-

vided below.

13.

Table 9-18. PCI AC Specifications

Symbol

Parameter

Min

Max

Unit

Comments

 

 

 

 

 

 

IOH(AC)

Switching current high

-12VIO

 

mA

0 < VOUT 0.3VIO,

(Note 1)

 

 

 

 

 

 

-17.1(VIO-VOUT)

 

mA

0.3VIO < VOUT < 0.9VIO

 

 

 

 

 

 

Equation A

 

0.7VIO < VOUT < VIO

 

 

 

(Figure 9-13)

 

 

 

 

 

 

 

 

 

Test point (Note 2)

 

-32VIO

mA

VOUT = 0.7VIO

 

 

 

 

 

 

IOL(AC)

Switching current low

16VIO

 

mA

VIO > VOUT 0.6VIO

(Note 1)

 

 

 

 

 

 

26.7VOUT

 

mA

0.6VIO > VOUT > 0.1VIO

 

 

 

 

 

 

 

 

 

 

 

 

Equation B

 

0.18VIO>VOUT>0

 

 

 

(Figure 9-13)

 

 

 

 

 

 

 

 

 

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

Output rise slew rate

1

4

V/ns

0.2VIO - 0.6VIO Load

(Note 3)

 

 

 

 

 

 

 

 

 

 

 

SLEWF

Output 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.

Pin

 

 

 

 

 

 

 

 

 

 

0.5" max.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Buffer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

1 KΩ

 

 

 

 

 

 

10 pF

 

1 KΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 9-12. Testing Setup for Slew Rate and Minimum Timing

AMD Geode™ SC2200 Processor Data Book

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AMD SC2200 manual PCI Bus Interface, PCI AC Specifications