DS1307 64 x 8, Serial, I2C Real-Time Clock 9 of 14 CONTROL REGISTER The DS1307 c" />
參數(shù)資料
型號: DS1307+
廠商: Maxim Integrated Products
文件頁數(shù): 14/14頁
文件大小: 0K
描述: IC RTC SERIAL 512K 8-DIP
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 50
類型: 時鐘/日歷
特點: 閏年,NVSRAM,方波輸出
存儲容量: 56B
時間格式: HH:MM:SS(12/24 小時)
數(shù)據(jù)格式: YY-MM-DD-dd
接口: I²C,2 線串口
電源電壓: 4.5 V ~ 5.5 V
電壓 - 電源,電池: 2 V ~ 3.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應商設備封裝: 8-PDIP
包裝: 管件
產(chǎn)品目錄頁面: 1433 (CN2011-ZH PDF)
DS1307 64 x 8, Serial, I2C Real-Time Clock
9 of 14
CONTROL REGISTER
The DS1307 control register is used to control the operation of the SQW/OUT pin.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
OUT
0
SQWE
0
RS1
RS0
Bit 7: Output Control (OUT). This bit controls the output level of the SQW/OUT pin when the square-wave output
is disabled. If SQWE = 0, the logic level on the SQW/OUT pin is 1 if OUT = 1 and is 0 if OUT = 0. On initial
application of power to the device, this bit is typically set to a 0.
Bit 4: Square-Wave Enable (SQWE). This bit, when set to logic 1, enables the oscillator output. The frequency of
the square-wave output depends upon the value of the RS0 and RS1 bits. With the square-wave output set to 1Hz,
the clock registers update on the falling edge of the square wave. On initial application of power to the device, this
bit is typically set to a 0.
Bits 1 and 0: Rate Select (RS[1:0]). These bits control the frequency of the square-wave output when the square-
wave output has been enabled. The following table lists the square-wave frequencies that can be selected with the
RS bits. On initial application of power to the device, these bits are typically set to a 1.
RS1
RS0
SQW/OUT OUTPUT
SQWE
OUT
0
1Hz
1
X
0
1
4.096kHz
1
X
1
0
8.192kHz
1
X
1
32.768kHz
1
X
0
X
1
0
1
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