CS5530 datasheet(13/241 Pages) NSC

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Signal Definitions (Continued)

2.1

PIN ASSIGNMENTS

The tables in this section use several common abbrevia-

tions. Table 2-1 lists the mnemonics and their meanings.

Figure 2-2 shows the pin assignment for the CS5530 with

Tables 2-2 and 2-3 listing the pin assignments sorted by

terminal number and alphabetically by signal name,

respectively.

In Section 2.2 “Signal Descriptions” a description of each

signal within its associated functional group is provided.

In the signal definitions, references to F0-F4, F1BAR,

F2BAR, F3BAR, F4BAR, and PCIUSB are made. These

terms relate to designated register spaces. Refer to Table

4-1 "PCI Configuration Address Register (0CF8h)" on

page 138 for details regarding these register spaces and

their access mechanisms.

Table 2-1. Pin Type Definitions

Mnemonic

Definition

5VT

Buffer is 5V tolerant

Input pin

I/O

Bidirectional pin

IBUF

Input buffer

OOutput

Open-drain output structure that

allows multiple devices to share the

pin in a wired-OR configuration

Pull-up resistor

Pull-down resistor

smt

Schmitt Trigger

t/s

Tri-state signal

VDD (PWR)

Power pin

VSS (GND)

Ground pin

The "#" symbol at the end of a signal

name indicates that the active, or

asserted state occurs when the signal

is at a low voltage level. When "#" is

not present after the signal name, the

signal is asserted when at a high volt-

age level.

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