参数资料
型号: DS1307N
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: Timer or RTC
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDIP8
封装: 0.300 INCH, PLASTIC, DIP-8
文件页数: 17/17页
文件大小: 765K
代理商: DS1307N
DS1307 64 x 8, Serial, I
2C Real-Time Clock
9 of 15
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.
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.
Bits 1, 0: Rate Select (RS1, RS0). 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.
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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