DS1089LU-21G(2005) 查看數據表（PDF） - Maxim Integrated
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DS1089LU-21G Datasheet PDF : 12 Pages
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3.3V Center Spread-Spectrum EconOscillator™
WRITE EE Command
The WRITE EE command is useful in closed-loop appli-
cations where the registers are frequently written. In
applications where the register contents are frequently
written, the WC bit should be set to 1 to prevent wear-
ing out the EEPROM. Regardless of the value of the WC
bit, the value of the ADDR register is always written
immediately to EEPROM. When the WRITE EE com-
mand has been received, the contents of the registers
are written into the EEPROM, thus locking in the regis-
ter settings.
I2C Serial Port Operation
SDA
SCL
START
CONDITION
MSB
1
SLAVE ADDRESS
2
6
R/W
DIRECTION
BIT
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
7
8
9
ACK
Figure 3. I2C Data Transfer Protocol
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
1
2
3–7
8
9
ACK
REPEATED IF MORE BYTES
ARE TRANSFERRED
STOP
CONDITION
OR REPEATED
START
CONDITION
MSB
LSB
1 0 1 1 A2 A1 A0 R/W
DEVICE
IDENTIFIER
DEVICE READ/WRITE BIT
ADDRESS
Figure 4. Slave Address Byte
10 ____________________________________________________________________
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