MSM6242B Datasheet_PDF文件下载_芯片资料查询

隆 Semiconductor

MSM6242B

隆 Semiconductor

DESCRIPTION

The MSM6242B is a silicon gate CMOS Real

Time Clock/Calendar for use in direct bus-

connection Microprocessor/Microcomputer

applications. An on-chip 32.768 KHz crystal

oscillator time base is divided to provide ad-

dressable 4-bit I/O data for SECONDS,

MINUTES, HOURS, DAY OF WEEK, DATE,

MONTH and YEAR. Data access is controlled

by 4-bit address, chip selects (CSO, CS1),

WRITE, READ,

and ALE. Control Registers

D, E and F provide for 30 SECOND error

adjustment, INTERRUPT REQUEST (IRQ

FLAG) and BUSY status bits, clock STOP,

HOLD, and RESET FLAG bits, 4 selectable

INTERRUPTS rates are available at the STD.P

MSM6242B

DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR

(STANDARD PULSE) output utilizing Con-

trol Register inputs T0, T1 and the ITRPT/

STND (INTERRUPT/STANDARD). Mask-

ing of the interrupt output (STD.P) can be

accomplished via the MASK bit. The

MSM6242B can operate in a 12/24 hour for-

mat and Leap Year timing is automatic.

The MSM6242B normally operates from a 5V

卤10%

supply at 鈥?0 to 85掳C. Battery backup

operation down to 2.0V allows continuation

of time keeping when main power is off. The

MSM6242B is offered in a 18-pin plastic DIP

and a 24-pin plastic Small Outline package.

FEATURES

DIRECT MICROPROCESSOR/MICROCONTROLLER BUS CONNECTION

TIME

23:59:59

MONTH

12

DATE

31

YEAR

80

鈥?/div>

DAY OF WEEK

7

鈥?4-bit data bus

鈥?4-bit address bus

鈥?/div>

READ, WRITE,

ALE and CHIP SELECT

INPUTS

鈥?Status registers 鈥?IRQ and BUSY

鈥?Selectable interrupt outputs 鈥?1/64

second, 1 second, 1 minute, 1 hour

鈥?Interrupt masking

鈥?32.768 KHz crystal controlled operation

12/24 hour format

Auto leap year

卤30

second error correction

Single 5V supply

Battery backup down to V

DD

= 2.0V

Low power dissipation:

20碌W max at V

DD

= 2V

150碌W max at V

DD

= 5V

鈥?18 pin Plastic DIP (DIP18-P-300)

鈥?24 Pin-V Plastic SOP (SOP24-P-430-VK)

23

型号

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