參數(shù)資料
型號(hào): DS1856B-050
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 數(shù)字電位計(jì)
英文描述: 14/MDR/RECP/VERT PRS FIT/M2.6/SCW/30MIN
中文描述: DUAL 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PBGA16
封裝: 4 X 4 MM, 1 MM PITCH, CSBGA-16
文件頁數(shù): 29/31頁
文件大?。?/td> 484K
代理商: DS1856B-050
D
Dual, Temperature-Controlled Resistors with Inter-
nally Calibrated Monitors and Password Protection
____________________________________________________________________
29
Stop data transfer:
A change in the state of the data
line from low to high while the clock line is high defines
the STOP condition.
Data valid:
The state of the data line represents valid
data when, after a START condition, the data line is sta-
ble for the duration of the high period of the clock signal.
The data on the line can be changed during the low peri-
od of the clock signal. There is one clock pulse per bit of
data. Figures 5 and 6 detail how data transfer is accom-
plished on the 2-wire bus. Depending on the state of the
R/
W
bit, two types of data transfer are possible.
Each data transfer is initiated with a START condition
and terminated with a STOP condition. The number of
data bytes transferred between START and STOP con-
ditions is not limited and is determined by the master
device. The information is transferred byte-wise and
each receiver acknowledges with a ninth bit.
STOP
CONDITION
OR REPEATED
START
CONDITION
REPEATED IF MORE BYTES
ARE TRANSFERRED
ACK
START
CONDITION
ACK
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
ACKNOWLEDGEMENT
SIGNAL FROM RECEIVER
SLAVE ADDRESS
MSB
SCL
SDA
R/W
DIRECTION
BIT
1
2
6
7
8
9
1
2
8
9
3–7
Figure 5. 2-Wire Data Transfer Protocol
SDA
SCL
t
HD:STA
t
LOW
t
HIGH
t
R
t
F
t
BUF
t
HD:DAT
t
SU:DAT
REPEATED
START
t
SU:STA
t
HD:STA
t
SU:STO
t
SP
STOP
START
Figure 6. 2-Wire AC Characteristics
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