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2 dc characteristics, Dc characteristics, Table 9-10 – AMD Geode SC1201 User Manual

Page 371: Buffer types

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AMD Geode™ SC1200/SC1201 Processor Data Book

371

Electrical Specifications

32579B

9.2

DC Characteristics

Table 9-10 describes the signal buffer types of the SC1200/SC1201 processor. (See Table 3-2 on page 29 for each signal’s
buffer type.) The subsections that follows provide detailed DC characteristics according to buffer type.

Table 9-10. Buffer Types

Symbol

Description

Reference

Diode

Diodes only, no buffer

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IN

AB

Input, ACCESS.bus compatible with Schmitt Trigger

Section 9.2.1

IN

BTN

Input, TTL compatible with Schmitt Trigger, low leakage

Section 9.2.2

IN

PCI

Input, PCI compatible

Section 9.2.3

IN

STRP

Input, Strap ball (min V

IH

is 0.6V

IO

) with weak pull-down

Section 9.2.4

IN

T

Input, TTL compatible

Section 9.2.5

IN

TS

Input, TTL compatible with Schmitt Trigger type 200 mV

Section 9.2.6

IN

TS1

Input, with Schmitt Trigger type 200 mV

Section 9.2.7

IN

USB

Input, USB compatible

Section 9.2.8

O

AC97

Output, Totem-Pole, AC97 compatible

Section 9.2.9

OD

n

Output, Open-Drain, capable of sinking n mA, see Note 1

Note 1. Output from these signals is open-drain and cannot be forced high.

Section 9.2.10

OD

PCI

Output, Open-Drain, PCI compatible

Section 9.2.11

O

p/n

Output, Totem-Pole, capable of sourcing p mA and sinking n mA

Section 9.2.12

O

PCI

Output, PCI compatible, TRI-STATE

Section 9.2.13

O

USB

Output, USB compatible

Section 9.2.14

TS

p/n

Output, TRI-STATE, capable of sourcing p mA and sinking n mA

Section 9.2.15

WIRE

Wire, no buffer

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