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DS1307Z/TR PDF预览

DS1307Z/TR

更新时间： 2024-02-19 21:02:01
品牌 Logo 应用领域
美信 - MAXIM 时钟
页数 文件大小 规格书
15页 669K
描述
64 x 8, Serial, I2C Real-Time Clock

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DS1307Z/TR 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8473.30.11.80Factory Lead Time：6 weeks
风险等级：0.66Samacsys Confidence：3
Samacsys Status：ReleasedSamacsys PartID：232132
Samacsys Pin Count：8Samacsys Part Category：Integrated Circuit
Samacsys Package Category：Small Outline PackagesSamacsys Footprint Name：21-0041
Samacsys Released Date：2015-11-27 03:38:06Is Samacsys：N
最大时钟频率：0.032 MHz信息访问方法：I2C
中断能力：NJESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9 mm
湿度敏感等级：1端子数量：8
计时器数量：1最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260电源：5 V
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Timer or RTC最大供电电压：5.5 V
最小供电电压：4.5 V标称供电电压：5 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL最短时间：SECONDS
处于峰值回流温度下的最长时间：NOT SPECIFIED易失性：YES
宽度：3.9 mmuPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCK
Base Number Matches：1

DS1307Z/TR 数据手册

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DS1307 64 x 8, Serial, I2C Real-Time Clock  
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  
10 Seconds  
BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 FUNCTION  
RANGE  
00–59  
00–59  
00H  
01H  
CH  
0
Seconds  
Minutes  
Seconds  
Minutes  
10 Minutes  
10  
Hour  
PM/  
AM  
0
12  
24  
1–12  
+AM/PM  
00–23  
10  
02H  
0
Hours  
Hours  
Hour  
03H  
04H  
0
0
0
0
0
0
0
DAY  
Day  
Date  
01–07  
01–31  
10 Date  
Date  
Month  
Year  
10  
05H  
0
0
0
Month  
01–12  
Month  
06H  
07H  
10 Year  
Year  
Control  
RAM  
00–99  
—
OUT  
0
0
SQWE  
0
RS1  
RS0  
08H-3FH  
00H–FFH  
56 x 8  
0 = Always reads back as 0.  
8 of 15  
 
1...567891011...15

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