PC87591L datasheet(41/437 Pages) NSC

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2.0 Signal/Pin Description and Configuration (Continued)

Revision 1.07

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2.2

BUFFER TYPES AND SIGNAL/PIN DIRECTORY

The following sections contain detailed functional descriptions and electrical DC characteristics for the PC87591x signals.

The pin multiplexing and function selection criteria are described in Section 2.4 on page 54. The signal DC characteristics

are denoted by a buffer type symbol described briefly below and in further detail in Section 7.2 on page 374. The pin multi-

plexing information refers to two different types of multiplexing:

●

MUX - Multiplexed, denoted by a slash (/) between pins in the diagram in Section 2.1 on page 39. Pins are shared

between two different functions. Each function is associated with different board connectivity. Normally, the function

selection is determined by the board design and can not be changed dynamically. The multiplexing options must be

conﬁgured by the core in order to comply with the board implementation.

●

MM - Multiple Mode, denoted by an underscore (_) between pins in the diagram in Section 2.1 on page 39. Pins have

two or more modes of operation within the same function. These modes are associated with the same external

(board) connectivity. Mode selection may be controlled by the device driver through the registers of the functional

block and do not require a special setup. These pins are not considered multiplexed pins from the conﬁguration per-

spective. The mode selection method as well as the signal speciﬁcation in each mode are described in the functional

description.

Table 4. Buffer Types

Symbol

Description

INAC

Input, analog to ACM

INAD

Input, analog to ADC

INCS

Input, CMOS compatible, with Schmitt Trigger

INDI

Input, analog from remote diode

INOSC

Input, from crystal oscillator (not characterized)

INPCI

Input, PCI 3.3V

INSM

Input, SMBus compatible

INT

Input, TTL compatible

INTS

Input, TTL compatible, with Schmitt Trigger

INULR

Input, power, resistor protected (not characterized)

Op/n

Output, push-pull output buffer that is capable of sourcing p mA and sinking

n mA

ODn

Output, open-drain output buffer that is capable of sinking n mA

ODA

Output, analog from DAC

ODI

Output, analog to remote diode

OOSC

Output, to crystal oscillator (not characterized)

OPCI

Output, PCI 3.3V

PWR

Power pin

GND

Ground pin

PC87591L Datasheet(PDF) 41 Page - National Semiconductor (TI)

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