Power One SFP450 Series Owner's manual

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Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 1/21 BBA20005-G 001
Supersedes: -
SFP450/600I2CInterface ProgrammingManual
1Scope
This documentdescribesin detail theI2Ccommunication interfaceoftheSFP450/600 series. (SFP450-,
SFP600, ….)This includes thephysicallayerand theSWprotocol.
2SFP450/600I2CInterface GeneralCharacteristic
SFP450/600 I2Cinterfaceslave
I2CDeviceAddressingFormat 7bit
Device Address Range ACHex...AFHex, 7FHex,7DHex
Max. SFP450/600 on oneI2CBus 2
MaximumI2Cclock 100kHz
MaximumI2Cclock withoutholdingtheSCLlinedown SerialEEPROM:
Status Port: 100kHz 6.5kHz
Pull-Up Voltage 3.3…4V
SDA/SCLinternalseriesresistors 100
InternalPull-Up 10k
InternalPull-Up voltage 3.3V
Internalcapacitance 140pF
InternalPull-Up Address lines 3.2k
InternalPull-Up Address lines voltage 3V
InternalPull-Up WriteProtect 4.7k
Recommended externalPull-Up forSDA and SCL 1.2k …2k
DataOrganization -SerialEEPROM(256 x 8bit)
-Status Port withcommands
Figure 2-1 Characteristic

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 2/21 BBA20005-G 001
Supersedes: -
3Index
1Scope......................................................................................................................................................1
2SFP450/600 I2CInterfaceGeneralCharacteristic.................................................................................1
3Index......................................................................................................................................................2
4SFP450/600 I2Cfeatures........................................................................................................................3
4.1 Dynamicdata.................................................................................................................................3
4.2 Staticdata.......................................................................................................................................3
4.3 ConnectingtheSFP450/600 to theI2CBus...................................................................................4
4.4 SFP450/600 I2CSupply(Slave)....................................................................................................5
4.5 Device Address..............................................................................................................................5
4.6 I
2
CBus Masterand clock (SCL)speed.........................................................................................6
4.7 Maximumand minimumvalues forPull-Up resisters...................................................................6
5SWProtocol...........................................................................................................................................7
5.1 StaticserialEEPROM data............................................................................................................7
5.1.1 Howto Read an EEPROM byte............................................................................................8
5.1.2 Howto readan EEPROM datablock....................................................................................9
5.1.3 Howto writean EEPROM byte..........................................................................................10
5.1.4 Power OneEEPROM Definitions.......................................................................................11
5.1.4.1 Timestamp.......................................................................................................................11
5.1.4.2 Checksum32.....................................................................................................................11
5.2 DynamicStatus PortData............................................................................................................12
5.2.1 Status Bytedefinition...........................................................................................................13
5.2.2 Voltage/currentdatainterpretation......................................................................................13
5.2.3 Howto read thestatus bytefromStatus Port.......................................................................14
5.2.4 Howto read themeasured outputVoltage/Current.............................................................15
5.3 ErrorHandling.............................................................................................................................16
5.3.1 Read Byte.............................................................................................................................16
5.3.2 Read StaticserialEEPROM................................................................................................17
5.3.3 Read Status Port...................................................................................................................18
6Power-OneI2CInterface tool..............................................................................................................19
7Bibliography........................................................................................................................................21
8Figure Index.........................................................................................................................................21
9Glossary...............................................................................................................................................21

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 3/21 BBA20005-G 001
Supersedes: -
4SFP450/600I2Cfeatures
4.1 Dynamicdata
TheSFP450/600 series supports followingmonitoringfeatures:
-Measured Output1 voltage[V]
-Measured Output1 current[A]
-Power Supplyseated/notseated
-InputVoltagein range/outofrange
-All OutputVoltagein range/outofrange
-Output1 over currentoccurred true/false
-Output1 and 2 under voltageoccurred true/false
-Output1 over voltageoccurredtrue/false
-Fan OK/failure
-Over Temperaturetrue/false
4.2 Staticdata
In theEEPROM are followingstaticdatastored:
-Power SupplyModel
-SerialNumber
-Power-OneRevision
-MFG Year
-MFG Month
-MFG Day
-MFG Name
-MFG Location Code
-Specified Output1 Voltage
-Specified Output2 Voltage
-Specified Output1 Current
-Specified Output2 Current
-Specified OutputPower
-MinimumSpecified InputVoltage
-MaximumSpecified InputVoltage
-xx BytesEEPROM for Customer use
-Spec Number
-TimeStamp
-Sequential Nr
-Checksumover static range

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 4/21 BBA20005-G 001
Supersedes: -
GeneralI2CHWconfiguration
Figure 4-1 SystemOverview
4.3 Connecting theSFP450/600 to theI2CBus
Thefollowingdiagramshows howtheSFP450/600 can beconnected to theI2CBus.
Figure 4-2 Recommendedconnectingof the SFP450/600 tothe I2CBus
I
2
CBus Master
SFP450/600
SFP450/600
Other I
2
C
Devices
Oneor two
SFP450/600
:
I
2
CBus
EEPROM
+3.3VSB
:
PS A0 Pin A5
SFP450/600(I
2
CSlave)
Pin A6, B4,C4,D4 Internal supply
SDA
SCL
Pin B5
Pin C5
:
Pin A3,B1,B3,C1,C3,D3
Return
:
:
:
Address
decoder
3.3V
:
:
:
:
:
Controller
:
I
2
CMaster
To the other SFP450/600 or
3.3VSupply
I
2
C Bus
1
3
2
1
External Pull-Up
2
SDA/SCLinternal Pull-Up
3
SDA/SCLinternal series resistors
:
3V
Ref
.
Micro
controller
(Status Port)
:
:
:
:
:
:
:
:
:
:
:
5
4
4
5
SDA/SCLinternal capacitance
Internal Pull-UpAddress lines
Write Protect
Pin A4
:
:
6
6
Internal Pull-UpWrite Protect

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 5/21 BBA20005-G 001
Supersedes: -
4.4 SFP450/600 I2CSupply(Slave)
TheSFP450/600 MicroController/EEPROM is powered over theinternalsupplyoftheSFP450/600. For
redundancyincaseofDCfailure orSFP450/600 internalfailure theSFP450/600 Micro
Controller/EEPROM can bepowered over the“+3.3VSB”(Pin A6, B4,C4,D4 ;3.3V).Ifthere is no power
fortheSFP450/600 Micro Controller theentire I2CBus is blocked.
4.5 Device Address
Thefirstbyteafter theSTARTcondition on theBus isthedevice addresssentoutbytheBus Master to
determinewhich deviceisbeingselected. TheI2CBus allows7-bit or10-bit addressing. TheSFP450/600
Interface usesa7-bit address modeasdefinedinthePhilips I²Cspecification. TheSFP450/600 contains
anEEPROMand aSTATUS(microcontroller) device and eachdevice ontheI2CBus hastobeassigned
to auniqueaddress.
As shown belowin Error! Reference sourcenotfound.theaddress byteisbuilt up fromthree parts:
-Bit 2...7:Thesebits arealways thesameindependentofanyaddress line.
-Bit 1:This bit depends howtheAddress lineA0is connected on thebackplaneon theaddress
decoder.Theseare logic1 ifopen and logic0 ifwired to 0V(Return).
-Bit 0:Thisbitistheread/writebit (R=1/W=0)and determinesthedirection ofthedatafromortothe
Master.
MSB LSB
Bit 7 6 5 4 3 2 1 0
SFP450/600-S102
EEPROM
Device Address
1 0 1 0 1 1 PS A0 direc
fix fix fix fix fixfix addr.
line R/W
SFP450/600-S102
STATUS
Device Address
0 1 1 1 1 1 PS A0 direc
fix fix fix fix fix fix addr.
line R/W
Figure 4-3 Device Address
Address
Line
PS A0
Read/
Write Device Address
[Bin]
Device
Address
[Hex]
Device
Address
[Dec]
SFP450/600EEPROM Deviceaddress open read 1010’1111 AF 175
SFP450/600EEPROM Deviceaddress open write 1010’1110 AE 174
SFP450/600STATUS Deviceaddress open Read 0111’1111 7F 127
SFP450/600EEPROM Deviceaddress 0V read 1010’1101 AD 173
SFP450/600EEPROM Deviceaddress 0V Write 1010’1100 AC 172
SFP450/600STATUS Deviceaddress 0V Read 0111’1101 7D 125
Figure 4-4 Device Address Table

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 6/21 BBA20005-G 001
Supersedes: -
Example:On thebackplanePS A0 is connected to0V,you will havethefollowingdeviceaddress to read
abytefromtheSFP450/600 EEPROM:
MSB LSB
Bit 7 6 5 4 3 2 1 0
SFP450/600
EEPROM
Device Address
1 0 1 0 1 1 0 1
fix fix fix fix fix fix A0 R
->1010’1101Bin=ADHex=173Dec
4.6 I2CBus Master and clock(SCL)speed
TheI2CBusMastercontrolscommunications betweentheMasterandallI2Cdevicesconnectedtothe
bus. IfduringanI
2
Ccommunication cycletheSFP450/600 Status Portisinterruptedbyaninternal
service interrupt,theSFP450/600 will holdtheSCLlinelowtoforcethemaster intoawait state.Data
transferwill continuewhentheSFP450/600 releasestheSCLline.PleasenoteiftheI
2
Cbus is
communicatingwithaclockfrequencyslower than6.5kHz,theSCLlinewill notbeheldlow.The
SFP450/600 EERPOM isan ATMELAT24C02 compatibledevice and is notholdingdown theSCLline.
4.7 Maximumand minimumvalues forPull-Upresisters
ForI2C-bus systems, thevalues ofthePull-Up resistors depend on thefollowingparameters:
• Supplyvoltage
• Bus capacitance
• Number ofconnected devices (inputcurrent+leakagecurrent).
ThesupplyvoltagelimitstheminimumvalueofthePull-Upresistorduetothespecifiedminimumsink
currentof3mA. On a3.3Vsupply, this makes Rmin=3.3V/3mA=1.1k .
Thebus capacitanceis thetotalcapacitance ofwire, connections and pins. This capacitance limits the
maximumvalueofthePull-Upresisterduetothespecifiedrisetime.ForaSystemwith380pF
capacitance (two SFP450/600 and awire capacitance of100pf) Rmax=2.1k .
Forfurther information concerningthePull-Up resister, referto:
I²C Busspecification, 16.1Maximumand minimumvaluesofresistorsRpand Rsfor Standard-mode I2C-busdevices.

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 7/21 BBA20005-G 001
Supersedes: -
5SW Protocol
Thestaticdataare storedin aserialI2CEEPROMand thedynamicdatacan berequested over theStatus
Portwith three commands.
5.1 StaticserialEEPROMdata
Therefore each EEPROM address has defined data;this definition is documented in thefile:
104718_xxx.pdf, 104788_xxx.pdf
Dez
Hex
Address 0 staticdata 0
1 staticdata 1
251 staticdata FB
252 checksum FC
253 checksum FD
254 checksum FE
255 checksumFF
Figure 5-1: Data Organization
There are three differentmessageformats fortheSFP450/600 SerialEEPROM:
-Read an EEPROM byte
-Read an EEPROM block
-Writean EEPROM byte

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 8/21 BBA20005-G 001
Supersedes: -
5.1.1 Howto ReadanEEPROMbyte
1)"Startcondition"fromMaster
2)Master sends "Device address"with "writeattribute"
3)"Acknowledge"fromSlavedevice (SFP450/600)
4)Master sends "EEPROM address"
5)"Acknowledge"fromSlavedevice (SFP450/600)
6)"Repeated start"fromMaster (Sr/S)
7)Master sends "Device address"with "read attribute"
8)"Acknowledge"fromSlavedevice (SFP450/600)
9)Slavesends "Databyte"
10)"NotAcknowledge"fromMaster (powermanagementsystem)
11)"Stop condition"fromMaster
Master
Slave(SFP450/600 EEPROM)
S Slave
Adr. W
AEEPROM
Adr. A
Sr/S Slave
Adr. R
A
DataByte
/A P
8bit 8 bit 8bit 8 bit
Start
Condition
n
ot Ack
bit
Ack bit
Ack bit Ack bit Stop
Condition
Start
Condition

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 9/21 BBA20005-G 001
Supersedes: -
5.1.2 Howto readanEEPROMdata block
1)"Startcondition"fromMaster
2)Master sends "Device address"with "writeattribute"
3)"Acknowledge"fromSlavedevice (SFP450/600-S102)
4)Master sends "EEPROM address"
5)"Acknowledge"fromSlavedevice (SFP450/600-S102)
6)"Repeated start"fromMaster (Sr/S)
7)Master sends "Slaveaddress"with"read attribute"
8)"Acknowledge"fromSlavedevice (SFP450/600-S102)
9)Slavesends "Databyte"
10)"Acknowledge"fromMaster (powermanagementsystem)
n-timerepetition ofstep9)and 10)
11)Slavesends "Databyte"
12)"NotAcknowledge"fromMaster (powermanagementsystem)
13)"Stop condition"fromMaster
S SlaveAdr. W
A EEPROM Adr. A Sr/S SlaveAdr. R A DataByte A
8 bit 8 bit 8bit 8 bit
…. ….
Master
Slave(SFP450/600 EERPOM)
DataByte A
8bit DataByte /A P
8 bit
StartCondition Ack bit
Ack bit Ack bit
Ack bit
Stop
Condition
not Ack bit
Ack bit
StartCondition

All rightsstrictlyreserved. Reproductionor issuetothird partiesinanyformisnot permitted without written authority fromPower-One.
Title Issued 2006-05-19 SKl
Modified -- --
Mech. Eng. approved -- --
Marketing approved
SFP450/600 I2CInterfaceProgramming
Manual
Mfg. approved --
Size Scale Sheet Drawing No. Revision
www.power-one.com A4 10/21 BBA20005-G 001
Supersedes: -
5.1.3 Howto write anEEPROMbyte
1)Pull down theWriteProtectline(Pin A4)
2)"Startcondition"fromMaster
3)Master sends "Slaveaddress"with "writeattribute"
4)"Acknowledge"fromSlavedevice (SFP450/600)
5)Master sends "EEPROM address"
6)"Acknowledge"fromSlavedevice (SFP450/600)
7)Master sends "Databyte"
8)"Acknowledge"fromSlavedevice (SFP450/600)
9)"Stop condition"fromMaster
10)ReleasetheWriteProtectline(Pin A4)
11)Wait 5ms forthenextEEPROM communication (EEPROM writetime)
Master
Slave(SFP450/600 EEPROM)
WP S Slave
Adr. W
A
EEPROM
Adr. A
Data
Byte A
P WP↑
8 bit 8 bit 8bit
Ack bit
Ack bit Ack bit Stop
Condition
Start
Condition
ReleaseWrite
Protect line
Pull downWrite
Protect line