Table of Contents
Advertisement
RX - 8581 SA
JE
/
2
I
C-Bus Interface Real-time Clock Module
RX - 8581 SA
Features built-in 32.768-kHz crystal oscillator, frequency adjusted
2
Supports I
C-Bus's high speed mode (400 kHz)
Alarm interrupt function for day, date, hour, and minute settings
Fixed-cycle timer interrupt function
Time update interrupt function
32.768-kHz output with OE function
Auto correction of leap years
Wide interface voltage range: 1.8 V to 5.5 V
Wide time-keeping voltage range:1.6 V to 5.5 V
Low current consumption: 0.45
Compact package (NB: SON 22 pin PKG)
1. Overview
This module is an I
In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter
function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer
function, time update interrupt function, and 32.768-kHz output function.
The devices in this module are fabricated via a C-MOS process for low current consumption, which enables
long-term battery back-up.
All of these many functions are implemented in a thin, compact SON package, which makes it suitable for
various kinds of mobile telephones and other small electronic devices.
2. Block Diagram
32.768 kHz
OSC
FOUT
FOE
/ INT
SCL
SDA
NB
/
JE
/
(FOE and FOUT pins)
A /3 V (Typ.)
2
C bus interface-compliant real-time clock which includes a 32.768-kHz crystal oscillator.
DIVIDER
FOUT
CONTROLLER
INTERRUPT
CONTROLLER
2
I
C-BUS
INTERFACE
CIRCUIT
NB
/
(Seconds, minutes)
(from 2000 to 2099)
2
The I
C-Bus is a trademark of PHILIPS ELECTRONICS N.V.
CLOCK
TIMER
ALARM
CONTROL
SYSTEM
CONTROLLER
Page - 1
and
CALENDAR
REGISTER
REGISTER
REGISTER
and
MQ372-02
Advertisement
Table of Contents
