beautypg.com

6 pci bus, Figure 9-13, Testing setup for pci slew rate and minimum timing – AMD Geode SC1201 User Manual

Page 388: Table 9-20, Pci ac specifications

background image

388

AMD Geode™ SC1200/SC1201 Processor Data Book

Electrical Specifications

32579B

9.3.6

PCI Bus

The SC1200/SC1201 processor is compliant with PCI bus
v2.1 specification. Relevant information from the PCI bus
specification is provided below.

All parameters in Table 9-20 are not 100% tested. The
parameters in this table are further described in Figure 9-
14.

Figure 9-13. Testing Setup for PCI Slew Rate and Minimum Timing

Table 9-20. PCI AC Specifications

Symbol

Parameter

Min

Max

Unit

Comments

I

OH

(AC)

(Note 1)

Switching current high

-12V

IO

mA

0 < V

OUT

≤ 0.3V

IO,

-17.1(V

IO

-V

OUT

)

mA

0.3V

IO

< V

OUT

< 0.9V

IO

Equation A

(Figure 9-14)

0.7V

IO

< V

OUT

< V

IO

Test point (Note 2)

-32V

IO

mA

V

OUT

= 0.7V

IO

I

OL

(AC)

(Note 1)

Switching current low

16V

IO

mA

V

IO

> V

OUT

≥ 0.6V

IO

26.7V

OUT

mA

0.6V

IO

> V

OUT

> 0.1V

IO

Equation B

(Figure 9-14)

0.18V

IO

>V

OUT

>0

Test point (Note 2)

38V

IO

mA

V

OUT

= 0.18V

IO

I

CL

Low clamp current

-25+(V

IN

+1)/0.015

mA

-3 < V

IN

< -1

I

CH

High clamp current

25+(V

IN

-V

IO

-1)/0.015

mA

V

IO

+4 > V

IN

> V

IO

+1

SLEW

R

(Note 3)

Output rise slew rate

1

4

V/ns

0.2V

IO

- 0.6V

IO

Load

SLEW

F

Output fall slew rate

1

4

V/ns

0.6V

IO

- 0.2V

IO

Load

Note 1. Refer to the V/I curves in Figure 9-14. 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 9-14. 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 9-13.

Buffer

V

CC

0.5" max.

Pin

1 K

Ω

1 K

Ω

10 pF

Output

This manual is related to the following products: