SI5374 Datasheet, PDF (47/69 Pages) Silicon Laboratories – 4-PLL ANY-FREQUENCY PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

Si5374
Register 128.
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
CK2_ACTV_REG CK1_ACTV_REG
Type
R
R
R
R
R
R
R
R
Reset value = 0010 0000
Bit
Name
Function
7:2
Reserved
1 CK2_ACTV_REG CK2_ACTV_REG.
Indicates if CKIN2 is currently the active clock for the DSPLL input.
0: CKIN2 is not the active input clock. Either it is not selected or LOS2_INT is 1.
1: CKIN2 is the active input clock.
0 CK1_ACTV_REG CK1_ACTV_REG.
Indicates if CKIN1 is currently the active clock for the DSPLL input.
0: CKIN1 is not the active input clock. Either it is not selected or LOS1_INT is 1.
1: CKIN1 is the active input clock.
Register 129.
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
LOS2_INT LOS1_INT LOSX_INT
Type
R
R
R
R
R
R
R
R
Reset value = 0000 0110
Bit
Name
Function
7:3
Reserved
2
LOS2_INT LOS2_INT.
Indicates the LOS status on CKIN2.
0: Normal operation.
1: Internal loss-of-signal alarm on CKIN2 input.
1
LOS1_INT LOS1_INT.
Indicates the LOS status on CKIN1.
0: Normal operation.
1: Internal loss-of-signal alarm on CKIN1 input.
0
LOSX_INT LOSX_INT.
Indicates the LOS status of the external reference on the OSC pins.
0: Normal operation.
1: Internal loss-of-signal alarm on OSC reference clock input.
Rev. 1.1
47