RA8804 CE
Page - 1
ETM60E-02
I
2
C-Bus Interface Real-time Clock Module
RA8804
CE
Features built-in 32.768 kHz DTCXO.
Supports I
2
C-Bus's high speed mode (Up to 400 kHz)
Time -Stamp function with EVIN-Pin trigger.
Outputs to SOUT-Pin of each of detection Flag or others.
Alarm interrupt function for day, date, hour, and minute settings
Fixed-cycle timer interrupt function
244.14 µs to 32 years
Time update interrupt function
(Seconds, minutes)
Temperature compensated 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:1.5 V to 5.5 V
Low current consumption: 0.35 µA / 3.0 V (Typ.)
AEC-Q100 compliant for automotive applications
1. Overview
This module is an I2C bus interface-compliant 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, 32.768 kHz output function, Time-stamp function with EVIN-pin trigger,
and. Programmable output function to SOUT-pin of detection Flag or others.
The devices in this module are fabricated via a C-MOS process for low current consumption, which enables
long-term battery back-up.
2. Block Diagram
INTERRUPTS
CONTROLLER
ALARM REGISTER
/ INT
BUS
INTERFACE
CIRCUIT
( 32.768 kHz )
CONTROL
REGISTER
DIVIDER
CLOCK
POWER
CONTROLLER
and
SDA
VDD
SCL
CALENDR
TIMER REGISTER
DTCXO
CONTROLLER
FOUT
FOUT
FOE
CONTROLLER
SOUT
SOUT
CONTROLLER
EVENT DETECTION
EVIN
CAPTURE
BUFFER
VDD
SYSTEM
CONTROLLER