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參數(shù)資料
| 型號(hào)： | DS1307N |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大小： | 765K |
| 代理商： | DS1307N |
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DS1307 64 x 8, Serial, I
2C Real-Time Clock
8 of 15
CLOCK AND CALENDAR
The time and calendar information is obtained by reading the appropriate register bytes. Table 2 shows
the RTC registers. The time and calendar are set or initialized by writing the appropriate register bytes.
The contents of the time and calendar registers are in the BCD format. The day-of-week register
increments at midnight. Values that correspond to the day of week are user-defined but must be
sequential (i.e., if 1 equals Sunday, then 2 equals Monday, and so on.) Illogical time and date entries
result in undefined operation. Bit 7 of Register 0 is the clock halt (CH) bit. When this bit is set to 1, the
oscillator is disabled. When cleared to 0, the oscillator is enabled.
Note that the initial power-on state of all registers is not defined. Therefore, it is important to
enable the oscillator (CH bit = 0) during initial configuration.
The DS1307 can be run in either 12-hour or 24-hour mode. Bit 6 of the hours register is defined as the
12-hour or 24-hour mode-select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5
is the AM/PM bit with logic high being PM. In the 24-hour mode, bit 5 is the second 10-hour bit (20 to
23 hours). The hours value must be re-entered whenever the 12/24-hour mode bit is changed.
When reading or writing the time and date registers, secondary (user) buffers are used to prevent errors
when the internal registers update. When reading the time and date registers, the user buffers are
synchronized to the internal registers on any I2C START. The time information is read from these
secondary registers while the clock continues to run. This eliminates the need to re-read the registers in
case the internal registers update during a read. The divider chain is reset whenever the seconds register is
written. Write transfers occur on the I2C acknowledge from the DS1307. Once the divider chain is reset,
to avoid rollover issues, the remaining time and date registers must be written within one second.
Table 2. Timekeeper Registers
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FUNCTION
RANGE
00H
CH
10 Seconds
Seconds
00–59
01H
0
10 Minutes
Minutes
00–59
12
10
Hour
02H
0
24
PM/
AM
10
Hour
Hours
1–12
+AM/PM
00–23
03H
0
DAY
Day
01–07
04H
0
10 Date
Date
01–31
05H
0
10
Month
01–12
06H
10 Year
Year
00–99
07H
OUT
0
SQWE
0
RS1
RS0
Control
—
08H-3FH
RAM
56 x 8
00H–FFH
0 = Always reads back as 0.
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PDF描述 |
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| DS1307ZN | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1307 | 1 TIMER(S), REAL TIME CLOCK, PDIP8 |
| DS1315EN-5 | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| DS1315-5 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1315EN-33 | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1307N+ | 功能描述:實(shí)時(shí)時(shí)鐘 64x8 Serial I2C 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1307Z | 功能描述:實(shí)時(shí)時(shí)鐘 64x8 Serial I2C 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1307Z/T&R | 制造商:Maxim Integrated Products 功能描述:SERIAL TIME CHIP 8PIN SOIC, T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Maxim Integrated DS1307Z/T&R Real Time Clocks (RTC) 制造商:Maxim Integrated Products 功能描述:IC RTC SERIAL 512K 8-SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock 64x8 Serial I2C RTC |
| DS1307Z/T&R | 功能描述:實(shí)時(shí)時(shí)鐘 64x8 Serial I2C 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1307Z/T&R/C03 | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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