PCI_PCIe User Guide_RevA.pdf - Symmetricom

1.4. Device Registers
each cell in Table 2 and Table 3 define the bit positions for each data field. All undefined bit positions
in Table 3 are N/A.
Table 2. TFP Binary Time Format
Register
Data Bits
31-28 27-24 23-20 19-16 15-8 7-0
TIME1
EVENT1
EVENT2_1
Major Time UNIX Seconds
31 - 0
EVENT3_1
TIME0
EVENT0
N/A
Status
100 ns
Binary microseconds
EVENT2_0
31 - 28
27 - 24
23 - 20
19 - 0
EVENT3_0
MAJSTRB
N/A
31 - 22
Major Time UNIX Sec (22 bits LSB)
21 - 0
MINSTRB
N/A
Status
N/A
Binary microseconds
31 - 28
27 - 24
23 20
19 - 0
Table 3. TFP Decimal Time Format
- 33 -