參數(shù)資料
型號: MAX6663AEE+T
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 溫度/濕度傳感器
英文描述: Temperature Monitors and PWM Fan Controllers
中文描述: ANALOG TEMP SENSOR-VOLTAGE, 1uA, 1Cel, RECTANGULAR, SURFACE MOUNT
封裝: 0.150 INCH, 0.025 PITCH, MO-137, QSOP-16
文件頁數(shù): 22/24頁
文件大小: 297K
代理商: MAX6663AEE+T
MAX6653/MAX6663/MAX6664
Temperature Monitors and
PWM Fan Controllers
_______________________________________________________________________________________
7
Figure 1. SMBus Protocols
Write Byte Format
Read Byte Format
Send Byte Format
Receive Byte Format
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
Command Byte: selects which
register you are writing to
Data Byte: data goes into the register
set by the co mma nd byte ( to se t
thresholds, configuration masks, and
sampling rate)
Slave Address: equiva-
lent to chip-select line
Command Byte: selects
which register you are
reading from
Slave Address: repeated
due to change in data-
flow direction
Data Byte: reads from
the register set by the
command byte
Data Byte: writes data to the
register commanded by the
last read byte or write byte
transmission
Data Byte: reads data from
the register commanded
by the last read byte or
write byte transmission;
also used for SMBus alert
response return address
S = Start condition
P = Stop condition
Shaded = Slave transmission
/ / / = Not acknowledged
ACK
7 bits
ADDRESS
ACK
8 bits
DATA
ACK
P
8 bits
S
COMMAND
WR
ACK
7 bits
ADDRESS
ACK
S
ACK
8 bits
DATA
7 bits
ADDRESS
RD
8 bits
P
S
COMMAND
/ / /
WR
ACK
7 bits
ADDRESS
8 bits
COMMAND
ACK
P
S
WR
ACK
7 bits
ADDRESS
RD
8 bits
DATA
P
S
/ / /
Figure 2. SMBus Write Timing Diagram
SMBCLK
AB
C
D
E
FG
H
I
J
K
SMBDATA
tSU:STA
tHD:STA
tLOW
tHIGH
tSU:DAT
tHD:DAT
tSU:STO tBUF
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
L
M
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE
H = LSB OF DATA CLOCKED INTO SLAVE
I = MASTER PULLS DATA LINE LOW
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
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