39.17.4 Host Frame Number
Name: | FNUM |
Offset: | 0x10 |
Reset: | 0x0000 |
Property: | PAC Write-Protection |
Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
FNUM[10:5] | |||||||||
Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
Reset | 0 | 0 | 0 | 0 | 0 | 0 |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
FNUM[4:0] | |||||||||
Access | R/W | R/W | R/W | R/W | R/W | ||||
Reset | 0 | 0 | 0 | 0 | 0 |
Bits 13:3 – FNUM[10:0] Frame Number
These bits contains the current SOF number.
These bits can be written by software to initialize a new frame number value. In this case, at the next SOF, the FNUM field takes its new value.
As the FNUM register lies across two consecutive byte addresses, writing byte-wise (8-bits) to the FNUM register may produce incorrect frame number generation. It is recommended to write FNUM register word-wise (32-bits) or half-word-wise (16-bits).