PC87570-ICCSLASHVUL datasheet(25/168 Pages) NSC

部件名	PC87570-ICC/VUL

功能描述	PC87570 Keyboard and Power Management Controller

PDF	168 Pages

Scroll/Zoom	100%

制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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25 / 168 page

Signal/Pin Connection and Description

www.national.com

1. This is a quasi-bidirectional output. It has drive low capability. It is pulsing high for a short period; steady state:

pull high using a weak pull-up. See also Section 12.2.3 on page 90

TTL

Timer pin B

TRIS

102

STRAP

TRI-STATE strap option. When high, during

power-up reset, causes the PC87570 to ﬂoat all

its output and I/O signals.

VBAT

INULR

Battery supply. This is the 2.4 - 5.5V battery

voltage for the RTC circuitry.

VCC

21, 61,

98, 147

23, 67,

108, 161

N/A

Digital 5V or 3.3V power supply

VREF

ANIN

ANOUT

Reference voltage for the on-chip A/D circuits.

With the internal VREF enabled a capacitor is

connected between VREF and GND. When the

internal VREF is disabled, an External Refer-

ence voltage should be connected to this input.

WR1,0

103, 102

113, 112

Write control for bytes 0 and 1

Signal

Pin Number

Buffer Type

Function

160-pin

176-pin

Input

Output

PC87570-ICC/VUL 数据表(PDF) 25 Page - National Semiconductor (TI)

PC87570-ICC/VUL 数据表(HTML) 25 Page - National Semiconductor (TI)

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