I2C-bus: The serial revolution By replacing complex parallel interfaces with a s" />
參數(shù)資料
型號(hào): PCA85133U/2DA/Q1,0
廠商: NXP Semiconductors
文件頁數(shù): 2/8頁
文件大小: 0K
描述: IC LCD DRIVER UNIV UNCASED
標(biāo)準(zhǔn)包裝: 1,050
系列: *
I2C-bus: The serial revolution
By replacing complex parallel interfaces with a straightforward yet powerful serial
structure, the I2C-bus revolutionized chip-to-chip communications.
Invented by NXP (Philips) more than 30 years ago, the I2C-bus uses a simple two-wire
format to carry data one bit at a time. It performs inter-chip addressing, selection,
control, and data transfer. Speeds 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 I2C-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.
SDA
SCL
uC
A0
A1
1010A2A1A0R/W
A2
New function address
1010011 R/W
New function address
as assigned
New
function
MCU
RTC
LCD
I/O
A/D
D/A
I2C-bus devices are available in a wide range of functions. Each slave device has its own I2C-bus address, selectable using
address pins set 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 master role is typically played by a
microcontroller.
Parallel Interface
I2C Serial Interface
Master
Write data
Slave
SDA
SCL
transmitter
P
W
S
data
slave address
data
A
receiver
SDA
SCL
transmitter
receiver
Read data
P
R
S
data
slave address
data
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 sends the clock
< n data >
bytes
相關(guān)PDF資料
PDF描述
EB2011-CC SWITCH PUSHBUTTON SPDT 3A 125V
CPPLC4-HT76T OSC 5.0V PROG CMOS TRI ST 100PPM
3314S-1-103G TRIMMER 10K OHM 0.25W SMD
CPPLC4-HT76P OSC 5.0V PROG CMOS PWRDN 100PPM
W3A41A220KAT2A CAP ARRAY 4CH 22PF 100V 1206
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA85134 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart, simple solutions for the 12 most common design concerns
PCA85134H/Q900/1,1 功能描述:LCD 驅(qū)動(dòng)器 60 X 4 LCD DRIVER FOR MULTIPLEX RATES RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
PCA85134H/Q900/1,118 制造商:NXP Semiconductors 功能描述:Cut Tape
PCA8514 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stand-alone OSD
PCA8514P 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stand-alone OSD