实例介绍
【实例简介】I2C手册
I2C手册提供了各种串行总线的广泛概述，为什么应考虑I2C总线，I2C总线的技术细节及其工作方式，以前的限制/解决方案，与SMBus的比较，智能平台管理接口实现，可用的不同I2C设备的审查以及专利/专利权信息。I2C手册于2003年1月27日在加利福尼亚州圣何塞举行的2003年设计大会上，在为期3小时的TecForum上发布。
【实例截图】
【核心代码】
TABLE OF CONTENTS
TABLE OF CONTENTS...................................................................................................................................................2
OVERVIEW.......................................................................................................................................................................4
D ESCRIPTION .....................................................................................................................................................................4
SERIAL BUS OVERVIEW...............................................................................................................................................4
UART O VERVIEW .............................................................................................................................................................6
SPI O VERVIEW ..................................................................................................................................................................6
CAN O VERVIEW ...............................................................................................................................................................7
USB O VERVIEW ................................................................................................................................................................9
1394 O VERVIEW .............................................................................................................................................................10
I 2 C O VERVIEW ................................................................................................................................................................11
S ERIAL B US C OMPARISON S UMMARY .............................................................................................................................12
I 2 C THEORY OF OPERATION....................................................................................................................................13
I 2 C B US T ERMINOLOGY ...................................................................................................................................................13
START AND STOP C ONDITIONS ....................................................................................................................................14
HARDWARE CONFIGURATION...............................................................................................................................14
BUS COMMUNICATION.............................................................................................................................................14
T ERMINOLOGY FOR B US T RANSFER ................................................................................................................................15
I 2 C D ESIGNER B ENEFITS .................................................................................................................................................17
I 2 C M ANUFACTURERS B ENEFITS .....................................................................................................................................17
OVERCOMING PREVIOUS LIMITATIONS.............................................................................................................18
A DDRESS C ONFLICTS ......................................................................................................................................................18
C APACITIVE L OADING > 400 P F ( ISOLATION ).................................................................................................................19
V OLTAGE L EVEL T RANSLATION .....................................................................................................................................20
I NCREASE I 2 C B US R ELIABILITY (S LAVE D EVICES ).........................................................................................................21
I NCREASING I 2 C B US R ELIABILITY (M ASTER D EVICES )..................................................................................................22
C APACITIVE L OADING > 400 P F (B UFFER )......................................................................................................................22
L IVE I NSERTION INTO THE I 2 C B US .................................................................................................................................24
L ONG I 2 C B US L ENGTHS .................................................................................................................................................25
P ARALLEL TO I 2 C B US C ONTROLLER ..............................................................................................................................25
DEVELOPMENT TOOLS AND EVALUATION BOARD OVERVIEW..................................................................26
P URPOSE OF THE D EVELOPMENT T OOL AND I 2 C E VALUATION B OARD ...........................................................................26
W IN -I2CNT S CREEN E XAMPLES .....................................................................................................................................28
H OW TO O RDER THE I2C 2002-1A E VALUATION K IT .....................................................................................................31
COMPARISON OF I 2 C WITH SMBUS........................................................................................................................31
I 2 C/SMB US COMPLIANCY ...............................................................................................................................................31
D IFFERENCES SMB US 1.0 AND SMB US 2.0 ....................................................................................................................32
INTELLIGENT PLATFORM MANAGEMENT INTERFACE (IPMI)....................................................................32
I NTEL S ERVER M ANAGEMENT .........................................................................................................................................33
PICMG...........................................................................................................................................................................33
VME BUS .........................................................................................................................................................................34
I 2 C DEVICE OVERVIEW..............................................................................................................................................35
TV R ECEPTION ................................................................................................................................................................36
R ADIO R ECEPTION ..........................................................................................................................................................36
2
AN10216-01 I 2 C Manual
A UDIO P ROCESSING ........................................................................................................................................................37
D UAL T ONE M ULTI -F REQUENCY (DTMF)......................................................................................................................37
LCD D ISPLAY D RIVER ....................................................................................................................................................37
L IGHT S ENSOR ................................................................................................................................................................38
R EAL T IME C LOCK /C ALENDAR .......................................................................................................................................38
G ENERAL P URPOSE I/O E XPANDERS ...............................................................................................................................38
LED D IMMERS AND B LINKERS .......................................................................................................................................40
DIP S WITCH ....................................................................................................................................................................42
M ULTIPLEXERS AND S WITCHES .......................................................................................................................................43
V OLTAGE L EVEL T RANSLATORS .....................................................................................................................................45
B US R EPEATERS AND H UBS ............................................................................................................................................45
H OT S WAP B US B UFFERS ................................................................................................................................................45
B US E XTENDERS .............................................................................................................................................................46
E LECTRO -O PTICAL I SOLATION ........................................................................................................................................47
R ISE T IME A CCELERATORS .............................................................................................................................................47
P ARALLEL B US TO I 2 C B US C ONTROLLER ......................................................................................................................48
D IGITAL P OTENTIOMETERS .............................................................................................................................................48
A NALOG TO D IGITAL C ONVERTERS ................................................................................................................................48
S ERIAL RAM/EEPROM.................................................................................................................................................49
H ARDWARE M ONITORS /T EMP & V OLTAGE S ENSORS .....................................................................................................49
M ICROCONTROLLERS ......................................................................................................................................................49
I 2 C PATENT AND LEGAL INFORMATION..............................................................................................................50
ADDITIONAL INFORMATION ...................................................................................................................................50
APPLICATION NOTES..................................................................................................................................................50
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