PC87591L datasheet(49/437 Pages) NSC

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2.0 Signal/Pin Description and Configuration (Continued)

Revision 1.07

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2.2.8

Interrupt and Wake-Up Inputs (ICU and MIWU)

2.2.9

Power and Ground

Signal

128-Pin

LQFP

176-Pin

LQFP

I/O

Buffer

Type

Power

Well

Description

EXWINT20

EXWINT21

EXWINT22

EXWINT23

EXWINT24

EXWINT40

EXWINT45

EXWINT46

128

172

176

IINTS

VCC External Wake-up/Interrupt Inputs. Fed into

the Multi-Input Wake-up Unit (MIWU) for wake-

up or interrupt. Can be used as external

source for wake-up or interrupt. For details on

interrupt and wake-up event assignment, see

Table 17 on page 105.

PFAIL

123

165

INCS

VCC Power Fail. Non-maskable external interrupt

source. This assigned interrupt is non-

maskable only after being enabled by software

after reset.

SWIN

INCS

VCC Power Switch Input. Indicates a user request

to turn the power on or off. This signal is

connected to the Multi-Input Wake-up Unit

(MIWU) for wake-up of the core domain and

interrupt generation to the core for handling.

For details on interrupt and wake-up event

assignment, see Table 17 on page 105.

Signal

128-Pin

LQFP

176-Pin

LQFP

I/O

Buffer

Type

Power

Well

Description

AGND

GND

Analog Ground. Used as ground for the Analog

to Digital Converter (ADC) and the Digital to

Analog Converter (DAC).

AVCC

PWR

Analog 3.3V Power supply. Used as power

supply for the Analog to Digital Converter (ADC)

and the Digital to Analog Converter (DAC).

GND

15, 36,

90,

101,

117

17, 35,

46,122,

137,

159,167

GND

Ground. Serves for both on-chip logic, output

drivers and back-up battery circuit. See “Power

Connection and Layout Guidelines” on page 63

for details on connections with AGND.

VBAT

119

161

INULR

Battery Power Supply. Provides battery backup

to the Mobile System Wake-Up Control registers,

to the RTC and to the 32 KHz crystal oscillator

when VCC is lost. The pin is connected to the

internal logic through a series resistor for UL

protection.

VCC

35,

91,100,

115

34, 45,

123,136,

157,166

PWR

Standby Digital 3.3V Power Supply. Used for

all core-domain digital logic and all associated

I/O pins.

VDD

PWR

Digital 3.3V Power Supply. Serves as power

supply for the LPC interface and some of the

host-controlled functions.

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PC87591L 数据表(PDF) 49 Page - National Semiconductor (TI)

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