rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 4

• Manufacturer Part Number: rtc-4553ac
• Description: Real Time Clock Module
• Manufacturer: Epson Electronics America, Inc.

RTC – 4553AC
1. Overview
2. Block Diagram
Real-Time Clock Module
RTC – 4553AC
Designed for E-mater
Built-in 32.768 kHz quartz crystal allows adjustment- free operation and assures high accuracy
Integrated clock (hours, minutes, seconds) and calendar (year, month, day, day of the week) counter
Automatic leap year compensation until 2099
Selectable 24-hour/12-hour display mode (with AM/PM indication)
Clock data modification using increment method
Clock data serial output in BCD format
Software controlled 30 second adjustment
Selectable 1/10 Hz or 1024 Hz timing pulse output
Built-in SRAM (30
Constant voltage drive realizes low power consumption (1 A Typ.)
Supports low-voltage operation (3 V)
and minimizes voltage-induced frequency fluctuations
The RTC-4553 is a very compact real-time clock module with permanent calendar and serial data
input/output. The module is designed for E-mater; time accuracy is within ±5 10
It incorporates a heat-resistant 32.768 kHz quartz oscillator. The space saving package allows high-density
mounting and facilitates automated production.
Besides the clock and calendar functions (comprising all items from years to seconds), the RTC-4553
incorporates also a 30
The use of a CMOS IC makes possible low-voltage, low-power operation, to ensure proper timekeeping
also when powered from a backup battery.
S
S
CS
TP
SCK
CS
WR
OUT
IN
32.768 kHz
OUT
1
0
OSC
4 bit)
4 bit SRAM and offers other useful features.
Output
controller
controller
Input
Counter
Output controller
Page - 1
Control
register
Sec.
1
Shift controller
Control circuit
Min.
register
Control
Hou.
2
week
Day
of
register
Control
Day
3
-6
(±0.432 sec./day).
Mon.
Year
(120bit)
RAM
MQ - 342 - 01