SI5369 Datasheet, PDF (65/84 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

Si5369
Register 137.
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
FASTLOCK
Type
R
R
R
R
R
R
R
R/W
Reset value = 0000 0000
Bit
Name
Function
7:1
Reserved Do not modify.
0
FASTLOCK This bit must be set to 1 to enable FASTLOCK. This improves initial lock time by
dynamically changing the loop bandwidth.
Register 138.
Bit
D7
D6
D5
Name
Type R
R
R
Reset value = 0000 1111
D4
D3
D2
D1
D0
LOS4_EN[1:1] LOS3_EN[1:1] LOS2_EN[1:1] LOS1_EN [1:1]
R
R/W
R/W
R/W
R/W
Bit
Name
Function
7:4
Reserved
3 LOS4_EN [1:0] LOS4_EN [1:0].
Note: LOS1_EN is split between two registers.
00: Disable LOS monitoring.
01: Reserved.
10: Enable LOSA monitoring.
11: Enable LOS monitoring.
LOSA is a slower and less sensitive version of LOS. See the Family Reference Man-
ual for details.
2 LOS3_EN [1:0] LOS3_EN [1:0].
Note: LOS1_EN is split between two registers.
00: Disable LOS monitoring.
01: Reserved.
10: Enable LOSA monitoring.
11: Enable LOS monitoring.
LOSA is a slower and less sensitive version of LOS. See the Family Reference Man-
ual for details.
Rev. 1.0
65