Si5351a/b/c – Silicon Laboratories SI5351A/B/C User Manual
Page 61
Si5351A/B/C
Preliminary Rev. 0.95
61
Reset value = 0000 0000
Reset value = 11xx xxxx
Register 177. PLL Reset
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
PLLB_RST
PLLA_RST
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Name
Function
7
PLLB_RST
PLLB_Reset.
Writing a 1 to this bit will reset PLLB. This is a self clearing bit (Si5351A/C only).
6
Reserved
Leave as default.
5
PLLA_RST
PLLA_Reset.
Writing a 1 to this bit will reset PLLA. This is a self clearing bit.
4:0
Reserved
Leave as default.
Register 183. Crystal Internal Load Capacitance
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
XTAL_CL[1:0]
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Name
Function
7:6
XTAL_CL[1:0] Crystal Load Capacitance Selection.
These 2 bits determine the internal load capacitance value for the crystal. See "3.1.1.
Crystal Inputs (XA, XB)" on page 11.
00: Reserved. Do not select this option.
01: Internal CL = 6 pF.
10: Internal CL = 8 pF.
11: Internal CL = 10 pF (default).
5:0
Reserved
Leave as default.