SMBus Table: Output Enable Register
1
Byte 0 Name Control Function Type 0 1 Default
Bit 7
DIF OE7 Output Enable RW Low/Low OE7# control 1
Bit 6
DIF OE6 Output Enable RW Low/Low OE6# control 1
Bit 5
DIF OE5 Output Enable RW Low/Low OE5# control 1
Bit 4
DIF OE4 Output Enable RW Low/Low OE4# control 1
Bit 3
DIF OE3 Output Enable RW Low/Low OE3# control 1
Bit 2
DIF OE2 Output Enable RW Low/Low OE2# control 1
Bit 1
DIF OE1 Output Enable RW Low/Low OE1# control 1
Bit 0
DIF OE0 Output Enable RW Low/Low OE0# control 1
1. A low on these bits will overide the OE# pin and force the differential output Low/Low
SMBus Table: PLL Operating Mode and Output Amplitude Control Register
Byte 1 Name Control Function Type 0 1 Default
Bit 7
PLLMODERB1 PLL Mode Readback Bit 1
R
Latch
Bit 6
PLLMODERB0 PLL Mode Readback Bit 0
R
Latch
Bit 5
PLLMODE_SWCNTRL Enable SW control of PLL Mode RW
Values in B1[7:6]
set PLL Mode
Values in B1[4:3]
set PLL Mode
0
Bit 4
PLLMODE1 PLL Mode Control Bit 1
1
0
Bit 3
PLLMODE0 PLL Mode Control Bit 0
RW
1
0
Bit 2
1
Bit 1
AMPLITUDE 1 RW 00 = 0.6V 01 = 0.7V 1
Bit 0
AMPLITUDE 0 RW 10= 0.8V 11 = 0.9V 0
1. B1[5] must be set to a 1 for these bits to have any effect on the part.
SMBus Table: DIF Slew Rate Control Register
Byte 2 Name Control Function Type 0 1 Default
Bit 7
SLEWRATESEL DIF7 Adjust Slew Rate of DIF7 RW Slow setting Fast setting 1
Bit 6
SLEWRATESEL DIF6 Adjust Slew Rate of DIF6 RW Slow setting Fast setting 1
Bit 5
SLEWRATESEL DIF5 Adjust Slew Rate of DIF5 RW Slow setting Fast setting 1
Bit 4
SLEWRATESEL DIF4 Adjust Slew Rate of DIF4 RW Slow setting Fast setting 1
Bit 3
SLEWRATESEL DIF3 Adjust Slew Rate of DIF3 RW Slow setting Fast setting 1
Bit 2
SLEWRATESEL DIF2 Adjust Slew Rate of DIF2 RW Slow setting Fast setting 1
Bit 1
SLEWRATESEL DIF1 Adjust Slew Rate of DIF1 RW Slow setting Fast setting 1
Bit 0
SLEWRATESEL DIF0 Adjust Slew Rate of DIF0 RW Slow setting Fast setting 1
SMBus Table: Frequency Select Control Register
Byte 3 Name Control Function Type 0 1 Default
Bit 7
1
Bit 6
1
Bit 5
FREQ_SEL_EN
Enable SW selection of
frequency
RW
SW frequency
change disabled
SW frequency
change enabled
0
Bit 4
FSEL1 Freq. Select Bit 1
RW
1
0
Bit 3
FSEL0 Freq. Select Bit 0
RW
1
0
Bit 2
1
Bit 1
1
Bit 0
SLEWRATESEL FB Adjust Slew Rate of FB RW Slow setting Fast setting 1
1. B3[5] must be set to a 1 for these bits to have any effect on the part.
Byte 4 is Reserved and reads back 'hFF
Reserved
Reserved
See Frequency Select Table
See PLL Operating Mode Table
See PLL Operating Mode Table
Reserved
Controls Output Amplitude
Reserved
Reserved
