RA4803SA
Page - 1
ETM38E-03
For automotive Serial Interface Real-time Clock Module
RA4803
SA
•
Features built-in 32.768 kHz DTCXO, High Stability.
•
Serial interface in 4 lines form
•
Alarm interrupt function for day, date, hour, and minute settings
•
Fixed-cycle timer interrupt function
•
Time update interrupt function
(Seconds, minutes)
•
32.768 kHz output with OE function (FOE and FOUT pins)
•
Auto correction of leap years
(from 2000 to 2099)
•
Wide interface voltage range: 1.6 V to 5.5 V
•
Wide time-keeping voltage range: 1.6 V to 5.5 V
•
Low current consumption: 0.75
µ
A / 3 V (Typ.)
.
1. Overview
This module is an serial interface real-time clock which includes a 32.768 kHz DTCXO.
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 SOP-14 pin package.
2. Block Diagram
32kHz
DTCXO
32.768 kHz
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
FOUT
CONTROLLER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
DIVIDER
INTERRUPT
CONTROLLER
INTERFACE
CIRCUIT
FOUT
FOE
/ INT
CLK
DO
D I
CE
EVIN
