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參數(shù)資料
| 型號(hào)： | MAX6642YATT98+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEEC, TDFN-6 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 344K |
| 代理商： | MAX6642YATT98+T |
MAX6642
register was previously selected by a Write Byte
instruction. Use caution when using the shorter proto-
cols in multimaster systems, as a second master could
overwrite the command byte without informing the first
master.
Read temperature data from the read internal tempera-
ture (00h) and read external temperature (01h) regis-
ters. The temperature data format for these registers is
8 bits for each channel, with the LSB representing +1°C
(Table 1).
Read the additional bits from the read extended tem-
perature byte register (10h, 11h), which extends the
data to 10 bits and the resolution to +0.25
°C per LSB
(Table 2).
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
6
_______________________________________________________________________________________
S
ADDRESS
WR
ACK
P
DATA
ACK
COMMAND
7 BITS
1
8 BITS
SLAVE ADDRESS: EQUIVA-
LENT TO CHIP-SELECT LINE OF
A 3-WIRE INTERFACE
DATA BYTE: DATA GOES INTO THE REGISTER
SET BY THE COMMAND BYTE (TO SET
THRESHOLDS, CONFIGURATION MASKS, AND
SAMPLING RATE)
WRITE BYTE FORMAT
S
ADDRESS
WR
ACK
P
S
RD
ACK
///
DATA
COMMAND
7 BITS
8 BITS
READ BYTE FORMAT
SLAVE ADDRESS: EQUIVA-
LENT TO CHIP SELECT LINE
COMMAND BYTE: SELECTS
WHICH REGISTER YOU ARE
REDING FROM
SP
ADDRESS
WR
ACK
COMMAND
7 BITS
8 BITS
SEND BYTE FORMAT
COMMAND BYTE: SENDS COM-
MAND WITH NO DATA, USUALLY
USED FOR ONE-SHOT COMMAND
SP
ADDRESS
RD
ACK
///
DATA
7 BITS
8 BITS
RECEIVE BYTE FORMAT
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
SLAVE ADDRESS: REPEATED
DUE TO CHANGE IN DATA-
FLOW DIRECTION
DATA BYTE: READS FROM
THE REGISTER SET BY THE
COMMAND BYTE
S = START CONDITION
P = STOP CONDITION
SHADED = SLAVE TRANSMISSION
/// = NOT ACKNOWLEDGED
Figure 1. SMBus Protocols
SMBCLK
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
AB
C
D
E
FG
HI
J
SMBDATA
tSU:STA tHD:STA
tLOW
tHIGH
tSU:DAT
tSU:STO tBUF
LM
K
E = SLAVE PULLS SMBDATA LINE LOW
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
M = NEW START CONDITION
Figure 2. SMBus Write Timing Diagram
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