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• Um10204 I2c-bus Specification And User Manual Rev. 03
• Um10204 I2c-bus Specification And User Manual Rev. 03—19 June 2007

I²C Bus Description

1. I2C-bus specification and user manual. 5 - 9 October 2012 User manual. Document information Info Keywords Abstract Content I2C, I2C-bus, Standard-mode, Fast-mode, Fast-mode Plus, Fm+, Ultra Fast-mode, UFm, High Speed, Hs, inter-IC, SDA, SCL, USDA, USCL Philips Semiconductors (now NXP Semiconductors) developed a simple bidirectional 2-wire bus for efficient inter-IC control.
2. 6 Philips Semiconductors The I2C-bus specification 2.2 Manufacturer benefits I2C-bus compatible ICs don’t only assist designers, they also give a wide range of benefits to equipment manufacturers because:.The simple 2-wire serial I2C-bus minimizes interconnections so ICs have fewer pins and there are.

I²C bus was developed by Philips Semiconductors [NXP], originally designed to be a battery control interface.
The I²C interface standard defines both the electrical layer and protocol layer.
The I²C bus uses a bi-directional Serial Clock Line [SCL] and Serial Data Lines [SDA]. Both the SCL and SDA lines are pulled high via an Rp resistor. Resistor Rs is optional, and used for ESD protection for 'Hot-Swap' devices. No other lines are specified. Any device may be a Transmitter or Receiver, and a Master or Slave. Data and clock are sent from the Master ~ valid while the clock line is high. The link may have multiple Masters and Slaves on the bus, but only one Master may be active at any one time. I2C Slaves may receive or transmit data to the master.

UM10204I2C-bus specification and user manualRev. 4 — 13 February 2012User manualDocument informationInfoContentKeywordsI2C, I2C-bus, Standard-mode, Fast-mode, Fast. The im1WP is an electronic module with an I2C accessible 1-Wire interface. It enables devices on a 1-Wire bus to be read and written to via an I2C serial bus. It has special circuitry to enable long-distance communication on the 1-Wire bus. It uses the Dallas DS2482-100 I2C to 1-Wire Bridge chip. This module makes the five pins (0V, 0V, 1W, V+, Vx) available via a 5-pin, 3.5mm Pluggable Screw.

TLC59108 www.ti.com SLDS156B –MARCH 2009–REVISED JULY 2015 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT VCC Supply voltage 0 7 V VI Input voltage –0.4 7 V VO Output voltage –0.5 20 V IO Output current 120 mA TJ Junction temperature –40 150 °C Tstg Storage temperature –55 150 °C. UM10204 I2C バス仕様およびユーザーマニュアル Rev. 5.0J — 2012年10月9 日 （日本語翻訳11 月2 日） ユーザーマニュアル 文書情報 情報 内容 キーワード I2C、I2C バス、Standard-mode、Fast-mode、Fast-mode Plus、Fm+、 Ultra Fast-mode、UFm、Hispeed、Hs、インターIC、SDA、SCL、.

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I2C Bus Speed

Um10204 I2c-bus Specification And User Manual Rev. 03

There are a number of speed grades available depending on the I2C interface specification version
Three speed modes are specified in the 2001 I2C standard version:
Standard; 100kbps [Bits per Second], Fast mode; 400kbps, and High speed mode 3.4Mbps [HS Mode].
While the 2006 I2C version defines the Fast Mode Plus speed grade which increase the bus speed to 1MBps [1MHz].

I2C Communication

I2C, due to its two-wire nature (one clock, one data) can only communicate half-duplex. The maximum bus capacitance is 400pF, which sets the maximum number of devices on the I2C bus and the maximum line length. The interface uses 8 bit long bytes, MSB [Most Significant Bit] first, with each device having a unique address.

Data on the SDA data line only changes when the clock line [SCL] is low. However if SDA drops while SCL is high a start of frame is indicated. Also if SDA rises while SCL is high than a stop condition is indicated. The Start condition indicates a start of frame and the Stop condition indicates an end of frame. Each transfer on the I2C is 9 bits long, eight data bits followed by a '1' bit. The listener acknowledges the receipt of the byte in one of two ways; the listener may over write the '1' bit with a '0' bit indicating ready for more data. or leaving the trailing '1' indicating not ready for data.
The Master [talker] always generates the clock and the message. An I2C message begins with a Start bit, followed by a 7 bit Slave address and then a direction bit ['1' for Read, '0' for Write]. Once the slave address is sent, the slave is required to respond, otherwise the master will send a Stop or Retry bit.
If the Master sends a Write bit, the master will follow that with a sub-address to indicate a particular register. The slave will stop acknowledging the last byte of the transfer.

Remember that the I2C bus is defined as having a maximum capacitance of 400pF, that defines the maximum number of I2C components on the I2C bus and the I2C length [in combination]. So the I2C Bus length is never defined in the I2C Bus specification. However, there is one note in the interface specification: If the length of the bus lines on a PCB or ribbon cable exceeds 10 cm and includes the VDD and VSS lines, thewiring pattern must be: SDA - [Power/Ground or Ground] - SCL, or no Vdd/Vss lines if there embedded within the PCB.
Of course this could also be a twisted pair or shielded cable but I2C cable length still depends on the type of cable [and its capacitance] and the number of I2C devices.
Each I2C device is defined to have 10pF per I/O pin [maximum].

I2C Bus Voltage Levels

The voltage V_DD may be different for each device, but all devices have to relate their output levels to the voltage produced by the pull-up resistors [R_P] It is possible to run off two different bus voltages, but they have to be translated [refer to the spec.]. The I2C serial interface above show the I2C Pull-Up connecting to Vdd [supply voltage].

I²C Bus Terms

The I2C bus may also be seen as the Inter-IC Bus or the IIC Bus which all mean the same thing. The most common term is of course I2C. Of course there are always other references; I2C Serial Port, I2C Digital Interface, I2C Interface or I2C Interface Specification.

Um10204 I2c-bus Specification And User Manual Rev. 03—19 June 2007

I2C Bus Interface IC Manufacturers

Analog Devices
{12-Bit Plus Sign Temperature Sensors with SMBus/I2C-Compatible Serial Interface}

Powerflex 70 user manual pdf. View and Download Rockwell Automation PowerFlex 1203-USB user manual online. PowerFlex 1203-USB Media Converter pdf manual download. PowerFlex 1203-USB Converter User Manual Reproduction of the contents of this manual, in whole or in part, without Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment.

Maxim
{10-Bit Temperature Sensors with I2C-Compatible Serial Interface, Digital Potentiometer}

NXP Semiconductors
{ICs with an I²C Bus}

Many ICs have the I2C interface including;
processors, controllers, GPIO Expanders, LCD Controllers, Temperature Sensors, and Bus Controllers.

IC Manufacturers {All types, or use the Components Icon below}

I2C Bus Standards Information

The I2C Interface Specification may be down loaded from NXP [new name for Philips Semiconductor]
The I2C-Bus Specification, Version 2.1, January 2000; {Philips Semiconductor}
The above standard contains the Standard-Mode, Fast-Mode, and High Speed Mode [HS] upgrades.
The latest I2C revision; Fast Mode Plus [fm+] was released in April 2006
Previous Standards Revisions; I2C Version 1.0, 1992. I2C Version 2.0, 1998.
The I2C interface specification was developed by Philips Semiconductor

Access Bus Description

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