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I2C-bus specification and user manual



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NXP Semiconductors
UM10204 데이터시트, 핀배열, 회로
UM10204
I2C-bus specification and user manual
Rev. 4 — 13 February 2012
User manual
Document information
Info Content
Keywords
I2C, I2C-bus, Standard-mode, Fast-mode, Fast-mode Plus, Fm+,
Ultra Fast-mode, UFm, High Speed, Hs, inter-IC, SDA, SCL, USDA, USCL
Abstract
Philips Semiconductors (now NXP Semiconductors) developed a simple
bidirectional 2-wire bus for efficient inter-IC control. This bus is called the
Inter-IC or I2C-bus. Only two bus lines are required: a serial data line
(SDA) and a serial clock line (SCL). Serial, 8-bit oriented, bidirectional
data transfers can be made at up to 100 kbit/s in the Standard-mode, up to
400 kbit/s in the Fast-mode, up to 1 Mbit/s in the Fast-mode Plus (Fm+), or
http://www.DataSheet4U.net/
up to 3.4 Mbit/s in the High-speed mode. The Ultra Fast-mode is a
uni-directional mode with data transfers of up to 5 Mbit/s.
datasheet pdf - http://www.DataSheet4U.net/


UM10204 데이터시트, 핀배열, 회로
NXP Semiconductors
UM10204
I2C-bus specification and user manual
Revision history
Rev Date
Description
v.4 20120213
Modifications:
v.3 20070619
Update user manual.
The format of this document has been redesigned to comply with the new identity guidelines of
NXP Semiconductors.
Legal texts have been adapted to the new company name where appropriate.
Table “Document information”: added keywords “Ultra Fast-mode”, “UFm”, “USDA” and “USCL”
New Section 3.1 created and (old) sections 3.1 to 3.17 are moved under this new section and
renumbered to Section 3.1.1 to Section 3.1.17.
Section 3.1.12 “Reserved addresses”, added descriptive line below title of Table 3
Added (new) Table 4 “Assigned manufacturer IDs”
Added (new) Section 3.2 “Ultra Fast-mode I2C-bus protocol”
Added (new) Section 4.6 “Display Data Channel (DDC)”
added (new) Section 5.4 “Ultra Fast-mode”
Table 9 “Characteristics of the SDA and SCL I/O stages”:
symbol Vhys: deleted condition “VDD > 2 V”; deleted condition “VDD < 2 V” and its values
symbol VOL3 replaced with symbol VOL2; added (new) Table note [3]
parameter description for tof corrected from “output fall time from VIHmax to VILmax” to “output
time from VIHmin to VILmax”.
tof Min values for Fast-mode and Fast-mode Plus are changed to “20 ns (VDD / 5.5 V)”
Table 10 “Characteristics of the SDA and SCL bus lines for Standard, Fast, and Fast-mode Plus
I2C-bus devices[1]”:
tr Min value for Fast-mode changed from “20 + 0.1Cb ns” to “20 ns”
http://www.DataSheet4U.net/
tf Min values for Fast-mode and Fast-mode Plus are changed to “20 ns (VDD / 5.5 V)”
Table 11 “Characteristics of the SDAH, SCLH, SDA and SCL I/O stages for Hs-mode I2C-bus
devices”: second Condition for VOL changed from “VDD < 2 V” to “VDD 2 V”
Added (new) Section 6.3 “Ultra Fast-mode devices”.
Section 7.1 “Pull-up resistor sizing”, third paragraph changed from “... is a function of the rise time
minimum (tr) ...” to “... is a function of the rise time maximum (tr) ...”
Many of today’s applications require longer buses and/or faster speeds. Fast-mode Plus was
introduced to meet this need by increasing drive strength by as much as 10× and increasing the data
rate to 1 Mbit/s while maintaining downward compatibility to Fast-mode and Standard-mode speeds
and software commands.
v2.1 2000
Version 2.1 of the I2C-bus specification
v2.0 1998
The I2C-bus has become a de facto world standard that is now implemented in over 1000 different ICs
and licensed to more than 50 companies. Many of today’s applications, however, require higher bus
speeds and lower supply voltages. This updated version of the I2C-bus specification meets those
requirements.
v1.0 1992
Version 1.0 of the I2C-bus specification
Original 1982
first release
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
UM10204
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 13 February 2012
© NXP B.V. 2012. All rights reserved.
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datasheet pdf - http://www.DataSheet4U.net/




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