Download - Intel

More documents

Recommendations

Info

Mixing SMBus & I 2 C - design for interoperability Busses Intel Developer Forum Spring 2001 Can often use ‘I 2 C’ devices on PCI Management bus … if loading and rise times are compatible with SMBus and I 2 C specs: – Bus loading designed to work with I 2 C 3 mA sink current [or all devices meet 4mA sink capability] – Bus pullups and capacitance designed to meet 1000 ns Rise Time from 0.65V to 2.54V I 2 C and SMBus devices can share same bus. But Master needs to be compatible with the target. Copyright © 2001 Intel Corporation. Page 56
SMBus & I 2 C Design Recommendations Intel Developer Forum Spring 2001 Avoid using slave devices that lack data integrity checks on the IPMB or PCI Management Bus – Many of today’s simple devices don’t have checksums or error check codes – Longer bus can have more noise – A 3rd party firmware error could cause interrupts during transfers – ‘Public’ Bus traffic is not deterministic. Poorly behaved masters could be ‘bus hogs’. New devices should include SMBus PEC (Packet Error Check CRC) or use checksums ala IPMI messaging Copyright © 2001 Intel Corporation. Page 57
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 and 48: I 2 C/SMBus Application Multiplexin
Page 49 and 50: CBT 3244 PCF 8574 I 2 C/SMBus Appli
Page 51 and 52: I 2 C/SMBus Application Conversion
Page 53 and 54: I 2 C/SMBus Application Multiplexin
Page 55: Mixing SMBus & I 2 C - design for i
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
show all

Download - Intel

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?