ICM7170IPG Intersil Corporation, ICM7170IPG Datasheet

ICM7170IPG

Manufacturer Part Number

ICM7170IPG

Description

Manufacturer

Intersil Corporation

Datasheet

1.ICM7170IPG.pdf (13 pages)

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Manufacturer

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Price

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Bonase Electronics (HK) Co., Limited

Part Number:

ICM7170IPG

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HARRIS

Quantity:

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ICM7170IPG

Manufacturer:

HARRIS

Quantity:

5 510

Company:

BOSTOCK HK LIMITED

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ICM7170IPG

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INTERS

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598

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BOSTOCK HK LIMITED

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ICM7170IPGZ

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2 215

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Download datasheet (101Kb)

August 1997

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

Features

• 8-Bit, P Bus Compatible

• Regulated Oscillator Supply Ensures Frequency

• Time From 1/100 Seconds to 99 Years

• Software Selectable 12/24 Hour Format

• Latched Time Data Ensures No Roll Over During Read

• Full Calendar with Automatic Leap Year Correction

• On-Chip Battery Backup Switchover Circuit

• Access Time Less than 300ns

• 4 Programmable Crystal Oscillator Frequencies Over

• 3 Programmable Crystal Oscillator Frequencies Over

• On-Chip Alarm Comparator and RAM

• Interrupts from Alarm and 6 Selectable Periodic

• Standby Micro-Power Operation: 1.2 A Typical at 3.0V

Applications

• Portable and Personal Computers

• Data Logging

• Industrial Control Systems

• Point Of Sale

Ordering Information

NOTE: “A” Parts Screened to <5 A I

PART NUMBER

ICM7170IPG

ICM7170IDG

ICM7170IBG

ICM7170MDG

ICM7170AIPG

ICM7170AIDG

ICM7170AIBG

ICM7170AMDG

- Multiplexed or Direct Addressing

Stability and Low Power

Industrial Temperature Range

Military Temperature Range

Intervals

and 32kHz Crystal

TEMP. RANGE

-55 to 125

-40 to 85

(

24 Ld PDIP

24 Ld SBDIP

24 Ld SOIC

24 Ld SBDIP

24 Ld PDIP

24 Ld SBDIP

24 Ld SOIC

24 Ld SBDIP

STBY

PACKAGE

at 32kHz.

Intersil Corporation 1999

Microprocessor-Compatible, Real-Time Clock

E24.6

D24.6

M24.3

D24.6

E24.6

D24.6

M24.3

D24.6

PKG.

NO.

12-5

Description

The ICM7170 real time clock is a microprocessor bus

compatible peripheral, fabricated using Intersil’s silicon gate

CMOS LSl process. An 8-bit bidirectional bus is used for the

data I/O circuitry. The clock is set or read by accessing the 8

internal separately addressable and programmable counters

from

a pulse train divided down from a crystal oscillator circuit,

and the frequency of the crystal is selectable with the on-

chip command register. An extremely stable oscillator

frequency is achieved through the use of an on-chip

regulated power supply.

The device access time (t

for

microprocessors. Furthermore, an ALE (Address Latch

Enable) input is provided for interfacing to microprocessors

with a multiplexed address/data bus. With these two special

features, the ICM7170 can be easily interfaced to any

available microprocessor.

The ICM7170 generates two types of interrupts, periodic and

alarm. The periodic interrupt (100Hz, 10Hz, etc.) can be

programmed by the internal interrupt control register to

provide 6 different output signals. The alarm interrupt is set

by loading an on-chip 51-bit RAM that activates an interrupt

output through a comparator. The alarm interrupt occurs

when the real time counter and alarm RAM time are equal. A

status register is available to indicate the interrupt source.

An on-chip Power Down Detector eliminates the need for

external components to support the battery back-up

function. When a power down or power failure occurs,

internal logic switches the on-chip counters to battery back-

up operation. Read/write functions become disabled and

operation is limited to time-keeping and interrupt generation,

resulting in low power consumption.

Internal latches prevent clock roll-over during a read cycle.

Counter data is latched on the chip by reading the

100th-seconds counter and is held indeﬁnitely until the

counter is read again, assuring a stable and reliable time

value.

wait

100

seconds to years. The counters are controlled by

states

ICM7170

software

ACC

) of 300ns eliminates the need

overhead

File Number

with

3019.3

most

Related parts for ICM7170IPG

ICM7170IPG Summary of contents

Page 1

... Standby Micro-Power Operation: 1.2 A Typical at 3.0V and 32kHz Crystal Applications • Portable and Personal Computers • Data Logging • Industrial Control Systems • Point Of Sale Ordering Information TEMP. RANGE o PART NUMBER ( C) ICM7170IPG - PDIP ICM7170IDG - SBDIP ICM7170IBG - SOIC ICM7170MDG -55 to 125 24 Ld SBDIP ICM7170AIPG ...

Page 2

Pinouts ICM7170 (PDIP, SBDIP) TOP VIEW WR 1 ALE OSC OUT OSC IN 10 INT SOURCE 11 INTERRUPT 12 Functional Block Diagram ...

Page 3

Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

DC Electrical Speciﬁcations T A All I PARAMETER Leakage Current INTERRUPT, I (2) OL Capacitance D0 - D7, C I/O Capacitance A0 - A4, C ADDRESS AC Electrical Speciﬁcations Load Capacitance = 150pF, V PARAMETER ...

Page 5

Timing Diagrams xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx A0 - A4, CS xxxxxxxxxx FIGURE 1. READ CYCLE TIMING FOR NON-MULTIPLEXED BUS (ALE = V xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx A0 - A4, CS xxxxxxxxxx ...

Page 6

Timing Diagrams (Continued) ADDRESS VALID, CS LOW D7, CS ALE WR FIGURE 4. WRITE CYCLE TIMING FOR MULTIPLEXED BUS ( Pin Descriptions SIGNAL PIN NUMBER WR ALE CS A4- OSC ...

Page 7

ADDRESS HEX ...

Page 8

Detailed Description Oscillator The ICM7170 has an onboard CMOS Pierce oscillator with an internally regulated voltage supply for maximum accuracy, stability, and low power consumption. It operates at any of four popular crystal frequencies: 32.768kHz, 1.046576MHz, 2.097152MHz, and 4.194304MHz (Note ...

Page 9

PERIODIC INT’ MASK BITS INTERRUPT MASK REGISTER NOT USED INTERRUPT STATUS REGISTER PERIODIC INT’ FLAGS GLOBAL INTERRUPT FLAG BIT Interrupt Operation The Interrupt Output N-channel MOSFET (Figure 4) is enabled whenever both the Interrupt ...

Page 10

POSITIVE SUPPLY RAIL (+5V PIN 23 BATTERY R2 V BACK 2K PIN PIN 13 DIGITAL GROUND FIGURE 6. SIMPLIFIED ICM7170 BATTERY BACKUP CIRCUIT logical “0” shown in Figures 2 and 3. The ICM7170 ...

Page 11

TABLE 5. TYPICAL LOAD CAPACITOR VALUES CRYSTAL LOAD CAPS FREQUENCY (C1, C2) 32kHz 33pF 1MHz 33pF 2MHz 25pF 4MHz 22pF This three capacitor tuning method will be more stable than the original design and is mandatory for 32kHz tuning fork ...

Page 12

... All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certiﬁcation. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or speciﬁcations at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

Page 13

General Notes 1. TIME ACCESS - To update the present time registers (Hex 07) the / register must be read ﬁrst. The 7 real time counter 100 registers (Hours, Minutes, Seconds, Month, Date, Day, and Year) data ...

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