SI5338M-A-GMR Silicon Laboratories Inc, SI5338M-A-GMR Datasheet - Page 58

• Manufacturer Part Number: SI5338M-A-GMR
• Manufacturer: Silicon Laboratories Inc

Si5338
Reset value = xxxx xxxx
58
Register 30.
Name
Type
Bit
7:5
4:3
2:0
Bit
PFD_IN_FB[2:0]
D7
P2DIV_IN[2:1]
P2DIV[2:0]
Name
PFD_IN_FB[2:0]
R/W
D6
Selects the external input applied to the PFD feedback input. See also Register
48[7].
0: P2DIV_IN (fbclk)
1: P1DIV_IN (refclk)
2: P2DIV_OUT (P2 divider output) selected
3: P1DIV_OUT (P1 divider output) selected
4: Reserved
5: No Clock selected
6: Reserved
7: Reserved
These two bits and Register 28[5] create a 3-Bit field that selects the input to the
P2 divider [reg30[4:3] reg28[5]] = P2DIV_IN[2:0].
000b: Clock from IN5,IN6 is input to P2 divider
011b: Clock from IN4 is input to P2
100b: No clock is input to P2
All other bit values are reserved.
Sets the value of the P2 the divider.
0: Divide by 1
1: Divide by 2
2: Divide by 4
3: Divide by 8
4: Divide by 16
5: Divide by 32
D5
D4
Rev. 0.6
P2DIV_IN[2:1]
R/W
D3
Function
D2
P2DIV[2:0]
R/W
D1
D0