Overview; Block Diagram - Epson RX4111CE Applications Manual

Low Power Real Time Clock Module with SPI-Bus Interface and Time Stamp Function
RX4111CE
Built-in frequency adjusted 32.768 kHz crystal unit
Interface Type
Low current consumption at backup: 100 nA Typ. / 3.0 V
Wide operating voltage range
Wide time-keeper voltage range
Auto power switching function
Time stamp function
Time stamp memory can be used as users memory; 512 bit, 64 word x 8 bit
 Alarm interruption
 The various functions include full calendar, seconds alarm, wake-up timer, and 32.768 kHz output
Self monitoring function

1. Overview

RX4111CE is a real-time clock module with integrated 32.768 kHz crystal oscillator and SPI-Bus interface. In addition to
providing a calendar (year, month, date, day, hour, minute, second), this module provides other functions including time-
stamp from 1/1024 second to year, alarm, wake-up timer, time update interruption, and 32.768 kHz output. Time stamp
function can record maximum of 8 events. Using the backup battery switch control function and the interface power supply
input pin, RX4111CE can support various power supply circuits. All of the functions mentioned above are offered in a thin
and compact 3.2 x 2.5 ceramic package which could be used in various applications requiring small footprints.

2. Block Diagram

V
BAT
GND
Figure 2 Block Diagram
RX4111CE
ETM62E-02
: SPI-Bus 4 wire, 4 MHz Max.
: 1.6Vto5.5V
: 1.1Vto5.5V
: Automatically switches to backup power supply
by monitoring the V
: 8 times time-stamp,1/256 seconds with many selectable trigger.
: Day, date, hour, minute, second
: Voltage detection, Crystal oscillation stop, etc.
internal
V
DD
RTC Main Circuit
32.768 kHz
Register
Control
OSC
(System
Control)
32 kHz
to
1 kHz
Divider
512 Hz
to
1Hz
Divider
FOUT Controller
Seiko Epson Corporation
voltage.
DD
V
DD
(V
DET
Detector
I/O
Bus
Interface
Timer
Register
Event
Controller
Interrupts
Controller
Clock
and
Calendar
User RAM
1. Overview
V
DD
)
V
IO
CE
CLK
DI
DO
/INT
Alarm, Timer,
Update, Event
FOUT
FOUT,
Timer
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