參數(shù)資料
型號： DS1685SN-3
廠商： DALLAS SEMICONDUCTOR
元件分類： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO24
封裝： SOIC-24
文件頁數(shù)： 37/39頁
文件大?。?/td> 290K
代理商： DS1685SN-3
DS1685/DS1687
7 of 39
RTC ADDRESS MAP
The address map for the RTC registers of the DS1685/DS1687 is shown in Figure 2. The address map
consists of the 14 clock/calendar registers. Ten registers contain the time, calendar, and alarm data, and
four bytes are used for control and status. All registers can be directly written or read except for the
following:
1. Registers C and D are read-only.
2. Bit 7 of Register A is read-only.
3. The high order bit of the seconds byte is read-only.
DS1685 REAL TIME CLOCK ADDRESS MAP Figure 2
0
00H
0
SECONDS
1
SECONDS ALARM
13
CLOCK/
CALENDAR
14 BYTES
0DH
2
MINUTES
14
0EH
3
MINUTES ALARM
63
50 BYTES
USER RAM
03FH
4
HOURS
64
040H
5
HOURS ALARM
6
DAY OF THE WEEK
7
DAY OF THE MONTH
8
MONTH
9
YEAR
BANK0,
BANK 1
REGISTERS,
RAM
10
REGISTER A
11
REGISTER B
12
REGISTER C
127
07FH
13
REGISTER D
BINARY
OR
BCD
INP
U
TS
TIME, CALENDAR AND ALARM LOCATIONS
The time and calendar information is obtained by reading the appropriate register bytes shown in Table 1.
The time, calendar, and alarm are set or initialized by writing the appropriate register bytes. The contents
of the time, calendar, and alarm registers can be either Binary or Binary-Coded Decimal (BCD) format.
Table 1 shows the binary and BCD formats of the ten time, calendar, and alarm locations that reside in
both bank 0 and in bank 1, plus the two extended registers that reside in bank 1 only (bank 0 and bank 1
switching will be explained later in this text).
Before writing the internal time, calendar, and alarm registers, the SET bit in Register B should be written
to a logic 1 to prevent updates from occurring while access is being attempted. Also at this time, the data
format (binary or BCD), should be set via the data mode bit (DM) of Register B. All time, calendar, and
alarm registers must use the same data mode. The set bit in Register B should be cleared after the data
mode bit has been written to allow the real-time clock to update the time and calendar bytes.
Once initialized, the real-time clock makes all updates in the selected mode. The data mode cannot be
changed without reinitializing the ten data bytes. The 24/12 bit cannot be changed without reinitializing
the hour locations. When the 12-hour format is selected, the high order bit of the hours byte represents
PM when it is a logic 1. The time, calendar, and alarm bytes are always accessible because they are
相關(guān)PDF資料
PDF描述
DS1685Q-5 1 TIMER(S), REAL TIME CLOCK, PQCC28
DS1689SN 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS1689S 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS1693 1 TIMER(S), REAL TIME CLOCK, PDMA28
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1685SN-3+ 功能描述:實時時鐘 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1685SN-5 功能描述:實時時鐘 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1685SN-5/T& 制造商:DALLAS 制造商全稱: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:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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