参数资料
型号: RA-8581SAB-3
厂商: EPSON TOYOCOM CORP
元件分类: 时钟/数据恢复及定时提取
英文描述: REAL TIME CLOCK, PDSO14
封装: SOP-14
文件页数: 27/32页
文件大小: 569K
代理商: RA-8581SAB-3
RA – 8581 SA
Page - 1
MQ 432 - 01
For Automotive Applications, I2C-Bus Interface Real-time Clock Module
RA – 8581 SA
- It is suitable for the car accessories
- Features built-in 32.768-kHz crystal oscillator, frequency adjusted
- Supports I
2C-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
(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: 1.8 V to 5.5 V
- Wide time-keeping voltage range:1.6 V to 5.5 V
- Low current consumption: 0.45 A /3 V (Typ.)
The I
2C-Bus is a trademark of PHILIPS ELECTRONICS N.V.
1. Overview
This module is an I
2C bus interface-compliant real-time clock which includes a 32.768-kHz crystal oscillator.
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.
2. Block Diagram
CLOCK
and
CALENDAR
TIMER
REGISTER
ALARM
REGISTER
FOUT
CONTROLLER
CONTROL
REGISTER
and
SYSTEM
CONTROLLER
DIVIDER
INTERRUPT
CONTROLLER
I2C-BUS
INTERFACE
CIRCUIT
OSC
32.768 kHz
FOUT
FOE
/ INT
SCL
SDA
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