Telecom
12.4.9Corner Frequency
To select the corner frequency of the PLL loop filter, use the following:
Function:
IOCTL_FILTER_SELECT
Table 132. Corner Frequency Values
Name | Description | Value | |
|
|
| |
| Change the corner frequency of the PLL loop |
| |
FILTER_6HZ | filter to 6Hz and limits the phase slope to 41 | 0x04 | |
| ns per 1.326 ms. |
| |
|
|
| |
FILTER_12HZ | Change the corner frequency to 12 Hz | 0x00 | |
without phase slope limitation. | |||
|
| ||
|
|
|
12.4.10PLL Operating Mode
To select the operating mode of the PLL device, use the following:
Function:
IOCTL_MODE_SELECT
Table 133. PLL Operating Mode Values
Name | Value |
|
|
NORMAL_MODE | 0x00 |
|
|
HOLDOVER_MODE | 0x10 |
|
|
FREERUN_MODE | 0x20 |
|
|
12.4.11Reference Clock Alignment
The PLL device locks in an arbitrary phase dependency. If needed, the phase of the output clock (transmission clock to the AdvancedMC) can be aligned to the reference clock.
Function:
IOCTL_REFALIGN
Possible Values :
None - just call the function for realignment.
12.4.12Hardware Reset
To issue a hardware reset of the telecom clock PLL, use the following:
Function:
IOCTL_RESET
| Intel NetStructure® MPCBL0010 Single Board Computer |
October 2006 | Technical Product Specification |
Order Number: 304120 | 167 |
