The flow control calendar length can be shorter than 256 bits. When
CTL_TX_FC_CALLEN is a value of 0, the calendar length becomes 16
and only CTL_TX_FC_STAT[15:0] are used. When
CTL_TX_FC_CALLEN is a value of 1, the calendar length becomes 32
only CTL_TX_FC_STAT[31:0] are used, and so forth. The valid settings
for calendar length are as follows:
- 0x00 = 16 entries
- 0x01 = 32 entries
- 0x03 = 64 entries
- 0x07 = 128 entries
- 0x0F = 256 entries
All other values are reserved.
Note: This input should be static and must only be changed during
reset.