2H 2011
I 2C-bus: The rial revolution
交谊舞入门教学By replacing complex parallel interfaces with a straightforward yet powerful rial structure, the I 2C-bus revolutionized chip-to-chip communications.
Invented by NXP (Philips) more than 30 years ago, the I 2C-bus us a simple two-wire format to carry data one bit at a time. It performs inter-chip addressing, lection, control, and data transfer. S
peeds are up to 400 kHz (Fast-mode), 1 MHz (Fast-mode Plus), 3.4 MHz (High Speed-mode), or 5 MHz (Ultra Fast-mode).
The I 2C-bus shrinks the IC footprint and leads to lower IC costs. Plus, since far fewer copper traces are needed, it enables a smaller PCB, reduces design complexity, and
lowers system cost.
1010A 2A 1A 0R/W
A 2
New function address
1010011 R/W
New function address
as assigned
中队名称function
I 2C-bus devices are available in a wide range of functions. Each slave device has its own I 2C-bus address, lectable using
address pins t high (1) or low (0). Information is transmitted byte by byte, and each byte is acknowledged by the receiver.
There can be multiple devices on the same bus, and more than one IC can act as master. The mast
er role is typically played by a microcontroller.
Parallel Interface I 2C Serial Interface
Master
答案作文600字Write data
Slave
P
S
data
data
A
A
A
Read data
P
R
S
环境内分泌干扰物
data
slave address
data
桂花酒的制作方法
A
A
<
n data bytes
>
last data byte
S = Start condition R/W = read/write
A = Acknowledge
A = Not acknowledge P = Stop condition
The master always nds the clock
< n data > b ytes
NXP’s I 2C peripherals portfolio is grouped into twelve families, one for each of the most common, everyday design concerns.
General Purpo Input Output
(GPIO) expanders Add different types of inputs and outputs
Sensors and voltage management
Digital temperature information
Clocks / RTCs
Digital time and/or calendar
Blinkers, dimmers, drivers
For complete LED control, including LCD backlighting
I 2C-controlled DIP switches EEROMs / RAM combined with general-purpo outputs
Intelligent Stepper Motor Controllers
Easy and versatile control
Capacitive Sensor
Switch action without contact
Black-and-white LCD display drivers Monochrome, character, shapes, dots
Tiny rial ADCs / DACs Analog control and audio
Bus buffers and voltage translators
Extenders, hubs, and repeaters to support extra devices, longer distances, bus-voltage translation,
or hazardous conditions
Bridge ICs, bus controllers Add extra, fully featured I 2C masters
鱼头
More information
Multiplexers and switches Add advanced I 2C networking to allow more devices, backup, hot-swap
I 2
C-bus product summary
id大全
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