SMBus Table: Stop State and Impedance Control
Byte 11 Name Control Function Type 0 1 Default
Bit 7
FB_imp[1] FB Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 6
FB_imp[0] FB Zout RW 01=85Ω DIF Zout 11 = Reserved
Bit 5
0
Bit 4
0
Bit 3
0
Bit 2
0
Bit 1
STP[1] RW 00 = Low/Low 10 = High/Low 0
Bit 0
STP[0] RW 01 = HiZ/HiZ 11 = Low/High 0
Note: xx41 = 10, xx51 = 01, P1 = factory programmable.
SMBus Table: Impedance Control
Byte 12 Name Control Function Type 0 1 Default
Bit 7
DIF2_imp[1] DIF2 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 6
DIF2_imp[0] DIF2 Zout RW 01=85Ω DIF Zout 11 = Reserved
Bit 5
DIF1_imp[1] DIF1 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 4
DIF1_imp[0] DIF1 Zout RW 01=85Ω DIF Zout 11 = Reserved
Bit 3
X
Bit 2
X
Bit 1
DIF0_imp[1] DIF0 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 0
DIF0_imp[0] DIF0 Zout RW 01=85Ω DIF Zout 11 = Reserved
Note: xx41 = 10, xx51 = 01, P1 = factory programmable.
SMBus Table: Impedance Control
Byte 13 Name Control Function Type 0 1 Default
Bit 7
DIF5_imp[1] DIF5 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 6
DIF5_imp[0] DIF5 Zout RW 01=85Ω DIF Zout 11 = Reserved
Bit 5
DIF4_imp[1] DIF4 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 4
DIF4_imp[0] DIF6 Zout RW 01=85Ω DIF Zout 11 = Reserved
Bit 3
X
Bit 2
X
Bit 1
DIF3_imp[1] DIF3 Zout RW 00=33Ω DIF Zout 10=100Ω DIF Zout
Bit 0
DIF3_imp[0] DIF3 Zout RW 01=85Ω DIF Zout 11 = Reserved
Note: xx41 = 10, xx51 = 01, P1 = factory programmable.
SMBus Table: Pull-up Pull-down Control
Byte 14 Name Control Function Type 0 1 Default
Bit 7
OE2_pu/pd[1] RW 00=None 10=Pup 0
Bit 6
OE2_pu/pd[0] RW 01=Pdwn 11 = Pup+Pdwn 1
Bit 5
OE1_pu/pd[1] RW 00=None 10=Pup 0
Bit 4
OE1_pu/pd[0] RW 01=Pdwn 11 = Pup+Pdwn 1
Bit 3
X
Bit 2
X
Bit 1
OE0_pu/pd[1] RW 00=None 10=Pup 0
Bit 0
OE0_pu/pd[0] RW 01=Pdwn 11 = Pup+Pdwn 1
Note: These values are for xx41 and xx51. P1 is factory programmable.
