Table 15.72. 0x0317 N1 Divider Update Bit
Reg Address
Bit Field
Type
Setting Name
Description
0x0317
0
S
N1_UPDATE
Must write a 1 to this bit to cause N1 divider changes to
take effect.
Table 15.73. 0x0322 N2 Divider Update Bit
Reg Address
Bit Field
Type
Setting Name
Description
0x0322
0
S
N2_UPDATE
Must write a 1 to this bit to cause N2 divider changes to
take effect.
Table 15.74. 0x032D N3 Divider Update Bit
Reg Address
Bit Field
Type
Setting Name
Description
0x032D
0
S
N3_UPDATE
Must write a 1 to this bit to cause N3 divider changes to
take effect.
Table 15.75. 0x0338 N4 Divider Update Bit
Reg Address
Bit Field
Type
Setting Name
Description
0x0338
0
S
N4_UPDATE
Must write a 1 to this bit to cause N4 divider changes to
take effect.
Table 15.76. 0x0338 All N Dividers Update Bit
Reg Address
Bit Field
Type
Setting Name
Description
0x0338
1
S
N_UPDATE
Writing a 1 to this bit will update all N dividers to the
latest value written to them. A specific N divider that has
not been changed will not be affected by writing a 1 to
this bit. When this bit is written to a 1, all other bits in
this byte should only be written to a 0.
This bit is provided so that all of the divider bits can be changed at the same time. First, write all of the new values to the divider, then
set the update bit.
Note: If the intent is to write to the N_UPDATE_ALL to have all dividers update at the same time, then make sure only bit 1
N_UPDATE_ALL bit gets set.
Table 15.77. 0x0339 FINC/FDEC Masks
Reg Address
Bit Field
Type
Setting Name
Description
0x0339
4:0
R/W
N_FSTEP_MSK
0 to enable FINC/FDEC updates
1 to disable FINC/FDEC updates
• Bit 0 corresponds to MultiSynth N0 N_FSTEP_MSK 0x0339[0]
• Bit 1 corresponds to MultiSynth N1 N_FSTEP_MSK 0x0339[1]
• Bit 2 corresponds to MultiSynth N2 N_FSTEP_MSK 0x0339[2]
• Bit 3 corresponds to MultiSynth N3 N_FSTEP_MSK 0x0339[3]
• Bit 4 corresponds to MultiSynth N4 N_FSTEP_MSK 0x0339[4]
There is one mask bit for each of the five N dividers.
Si5391 Reference Manual • Si5391A/B Register Map
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 0.5 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 11, 2022
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