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CBT 3244 I 2 C/SMBus Application Multiplexing Intel Developer Forum Spring 2001 • Simple analog Switch plus control = I 2 C bus multiplexing – e.g. CBT 3244 octal bus switch with quad enables • Best on private busses – Watch out for series resistance effects – CBT 3244 or compatible typically
CBT 3244 PCF 8574 I 2 C/SMBus Application Multiplexing Intel Developer Forum Spring 2001 • Analog Switch plus I 2 C/SMBus Latch = bus controllable multiplexing + = Main I 2 C 1:4 I 2 C bus mux I 2 C A I 2 C B I 2 C C I 2 C D Analog Switch I 2 C Latch E.g. Philips PCA9544* “4ch I 2 C Multiplexer with Interrupts” Copyright © 2001 Intel Corporation. Off-the-shelf multiplexers available Page 49 * All other brands and names are the property of their respective owners
Page 1 and 2: Server Management Controllers, Sens
Page 3 and 4: Disclaimers • A good starting poi
Page 5 and 6: IPMI Intelligent Platform Managemen
Page 7 and 8: Initiative News Intel Developer For
Page 9 and 10: Future: PCI Management Bus Intel De
Page 11 and 12: PCI Management Bus Server/IPMI appl
Page 13 and 14: BMC Features to look for… Built-i
Page 15 and 16: BMC Features to look for… I 2 C/S
Page 17 and 18: BMC Features to look for… Process
Page 19 and 20: BMC Features to look for… UARTs a
Page 21 and 22: BMC Features to look for... FAN mon
Page 23 and 24: BMC Features to look for… Extensi
Page 25 and 26: BMC Features to look for... Low Bea
Page 27 and 28: Management Controllers* Mfr. produc
Page 29 and 30: Enclosure/Peripheral Controllers Ex
Page 31 and 32: Enclosure Controllers Vitesse Semic
Page 33 and 34: Enclosure Controllers Qlogic GEM359
Page 35 and 36: Enclosure/Peripheral Controllers* I
Page 37 and 38: Temperature Monitoring and Fan Cont
Page 39 and 40: Board Temperature Sensors* Intel De
Page 41 and 42: Hardware Monitors* Analog Devices C
Page 43 and 44: Miscellaneous Sensors and Actuators
Page 45 and 46: Remote Management Cards Extend mana
Page 47: I 2 C/SMBus Application Multiplexin
Page 51 and 52: I 2 C/SMBus Application Conversion
Page 53 and 54: I 2 C/SMBus Application Multiplexin
Page 55 and 56: Mixing SMBus & I 2 C - design for i
Page 57 and 58: SMBus & I 2 C Design Recommendation
Page 59 and 60: SMBus & I 2 C Design Recommendation
Page 61 and 62: I 2 C/SMBus Testing Noise Tolerance
Page 63 and 64: I 2 C/SMBus Testing Testers & Monit
Page 65 and 66: IPMI Conformance Test Intel Develop
Page 67 and 68: Resource Information Component & To
Page 69 and 70: Call to Action Intel Developer Foru

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