Renesas IDT 89HPES12T3G2, User Manual

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IDT SMBus Interfaces
PES12T3G2 User Manual 5 - 16 January 28, 2013
Notes
Sample Slave SMBus Operation
This section illustrates sample Slave SMBus operations. Shaded items are driven by the PES12T3G2’s
slave SMBus interface and non-shaded items are driven by an SMBus host.
Figure 5.8 CSR Register Read Using SMBus Block Write/Read Transactions with PEC Disabled
Figure 5.9 Serial EEPROM Read Using SMBus Block Write/Read Transactions with PEC Disabled
Figure 5.10 CSR Register Write Using SMBus Block Write Transactions with PEC Disabled
1.
See Table 2 in the About This Manual chapter for a definition of these abbreviations.
DATAUU N DATAUM A
BYTCNT=7
A
ADDRL CMD (status)
S
PES12T3G2 Slave
SMBus Address
Wr A A BYTCNT=3 A CMD=read A ADDRL A ADDRU A P
CCODE
START,END
S
PES12T3G2 Slave
SMBus Address
Wr A A
CCODE
START,END
S
PES12T3G2 Slave
SMBus Address
Rd
DATALM DATALL
A A A
A A P ADDRU A
S
PES12T3G2 Slave
SMBus Address
Wr A N
CCODE
START,END
P
(PES12T3G2 not ready with data)
S
PES12T3G2 Slave
SMBus Address
Wr A
A
BYTCNT=4
A
CMD=read
A
EEADDR
A
ADDRL
A
P
CCODE
START,END
S
PES12T3G2 Slave
SMBus Address
Wr A A
CCODE
START,END
S
PES12T3G2 Slave
SMBus Address
Rd
ADDRU
A
BYTCNT=5
A
EEADDR CMD (status)
A A A
N
DATA ADDRU
A P
ADDRL
A
S
PES12T3G2 Slave
SMBus Address
Wr A N
CCODE
START,END
P
(PES12T3G2 not ready with data)
S
PES12T3G2 Slave
SMBus Address
Wr A A
BYTCNT=7
A
CMD=write
A
ADDRL
A
ADDRU
A
CCODE
START,END
DATALL
A
DATALM
A
DATAUM
A
DATAUU
A P
S
PES12T3G2 Slave
SMBus Address
Wr A
CCODE
START,END
N P
(PES12T3G2 busy with previous command, not ready for a new command)
S
PES12T3G2 Slave
SMBus Address
Wr A
CCODE
START,END
N P
(PES12T3G2 busy with previous command, not ready for a new command)