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参数资料
| 型号： | DS1685SN-5 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| 封装： | SOIC-24 |
| 文件页数： | 38/39页 |
| 文件大小： | 290K |
| 代理商： | DS1685SN-5 |
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DS1685/DS1687
8 of 39
double buffered. Once per second the ten bytes are advanced by one second and checked for an alarm
condition. If a read of the time and calendar data occurs during an update, a problem exists where
seconds, minutes, hours, etc. may not correlate. The probability of reading incorrect time and calendar
data is low. Several methods of avoiding any possible incorrect time and calendar reads are covered later
in this text.
The three time alarm bytes can be used in two ways.
First, when the alarm time is written in the
appropriate hours, minutes, and seconds alarm locations, the alarm interrupt is initiated at the specified
time each day if the alarm enable bit is high. The second use condition is to insert a “don’t care” state in
one or more of the three time alarm bytes. The “don’t care” code is any hexadecimal value from C0 to
FF. The two most significant bits of each byte set the “don’t care” condition when at logic 1. An alarm
will be generated each hour when the “don’t care” bits are set in the hours byte. Similarly, an alarm is
generated every minute with “don’t care” codes in the hours and minute alarm bytes. The “don’t care”
codes in all three time alarm bytes create an interrupt every second. The three time alarm bytes may be
used in conjunction with the date alarm as described in the Wake-up/Kickstart section. The century
counter will be discussed later in this text.
TIME, CALENDAR AND ALARM DATA MODES Table 1
RANGE
ADDRESS
LOCATION
FUNCTION
DECIMAL
RANGE
BINARY DATA
MODE
BCD DATA
MODE
00H
Seconds
0-59
00-3B
00-59
01H
Seconds Alarm
0-59
00-3B
00-59
02H
Minutes
0-59
00-3B
00-59
03H
Minutes Alarm
0-59
00-3B
00-59
04H
Hours 12-hr. Mode
1-12
01-0C AM, 81-8C PM
01-12 AM, 81-92 PM
Hours 24-Hour Mode
0-23
00-17
00-23
05H
Hours Alarm 12-hr. Mode
1-12
01-0C AM, 81-8C PM
01-12AM, 81-92 PM
Hours Alarm 24-hr. Mode
0-23
00-17
00-23
06H
Day of Week Sunday = 1
1-7
01-07
07H
Date of Month
1-31
01-1F
01-31
08H
Month
1-12
01-0C
01-12
09H
Year
0-99
00-63
00-99
BANK 1, 48H
Century
0-99
00-63
00-99
BANK 1, 49H
Date Alarm
1-31
01-1F
01-31
相关PDF资料 |
PDF描述 |
|---|---|
| DS1687-3 | 1 TIMER(S), REAL TIME CLOCK, DIP24 |
| DS1685S-5 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1685EN-3 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1685E-3 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1685EN-5 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1685SN-5/T& | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685SN-5/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1685SN-5/T&R | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1685SN-5/TR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685SN-5+ | 功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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