DS1307 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS1307 Datasheet PDF : 12 Pages
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DS1307 TIMEKEEPER REGISTERS Figure 3
DS1307
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
CONTROL REGISTER
The DS1307 control register is used to control the operation of the SQW/OUT pin.
BIT 7
OUT
BIT 6
0
BIT 5
0
BIT 4
SQWE
BIT 3
0
BIT 2
0
BIT 1
RS1
BIT 0
RS0
OUT (Output control): 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.
SQWE (Square Wave Enable): This bit, when set to a logic 1, will enable 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.
RS (Rate Select): These bits control the frequency of the square wave output when the square wave
output has been enabled. Table 1 lists the square wave frequencies that can be selected with the RS bits.
SQUAREWAVE OUTPUT FREQUENCY Table 1
RS1
RS0
SQW OUTPUT FREQUENCY
0
0
1Hz
0
1
4.096kHz
1
0
8.192kHz
1
1
32.768kHz
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