LTC1710I 查看數據表（PDF） - Linear Technology
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LTC1710I Datasheet PDF : 8 Pages
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BLOCK DIAGRA
LTC1710
VCC 8
VCC
DATA 6
CLK 5
START
AND
STOP
DETECTORS
INPUT
BUFFERS
SHIFT
REGISTER
COUNTER
UNDERVOLTAGE
LOCKOUT
POWER-ON
RESET
2V
ACK
LOGIC
A
B
OUTPUT
LATCHES
REGULATED
CHARGE
PUMPS
THERMAL
SHUTDOWN
AD1 3
ADDRESS
DECODER
ADDRESS
COMPARATOR
VCC
7 OUT1
1 SW0D
2 OUT0
GND
4
1710 BD
WU
W
TI I G DIAGRA
CLK
tSU:STA
DATA
START
tHD:STA
tHIGH
tSU:DAT
tr
tf
tHD:DAT
tLOW
tSU:STO
STOP
1710 TD
U
OPERATIO
SMBus Operation
SMBus is a serial bus interface that uses only two bus lines,
DATA and CLK, to control low power peripheral devices in
portable equipment. It consists of masters, also known as
hosts, and slave devices. The master of the SMBus is
always the one to initiate communications to the slave
devices by varying the status of the DATA and CLK lines.
The SMBus specification establishes a set of protocols that
devices on the bus must follow for communications.
The protocol that the LTC1710 uses is the Send Byte Pro-
tocol. In this protocol, the master first sends out a Start
signal by switching the DATA line from high to low while
CLK is high. (Because there may be more than one master
on the same bus, an arbitration process takes place if two
masters attempt to take control of the DATA line simulta-
neously; the first master that outputs a one while the other
master is zero loses the arbitration and becomes a slave
itself.) Upon detecting this Start signal, all slave devices on
the bus wake up and prepare to shift in the next byte of data.
5
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