Visible to Intel only — GUID: mwh1409959477832
Ixiasoft
Visible to Intel only — GUID: mwh1409959477832
Ixiasoft
4.11.6. Avalon® -ST Single-Clock FIFO Registers
32-Bit Word Offset |
Name |
Access |
Reset |
Description |
---|---|---|---|---|
0 |
fill_level | R |
0 |
24-bit FIFO fill level. Bits 24 to 31 are not used. |
1 |
Reserved |
— |
— |
Reserved for future use. |
2 |
almost_full_threshold | RW |
FIFO depth–1 |
Set this register to a value that indicates the FIFO buffer is getting full. |
3 |
almost_empty_threshold | RW |
0 |
Set this register to a value that indicates the FIFO buffer is getting empty. |
4 |
cut_through_threshold | RW |
0 |
0—Enables store and forward mode. Greater than 0—Enables cut-through mode and specifies the minimum of entries in the FIFO buffer before the valid signal on the Avalon® -ST source interface is asserted. Once the FIFO core starts sending the data to the downstream component, it continues to do so until the end of the packet.
Note: To turn on Cut-through mode, Use store and forward must be set to 0. Turning on Use store and forward mode prompts the user to turn on Use fill level, and then the CSR appears.
|
5 |
drop_on_error | RW |
0 |
0—Disables drop-on error. 1—Enables drop-on error. This register applies only when the Use packet and Use store and forward parameters are turned on. |
32-Bit Word Offset |
Name |
Access |
Reset Value |
Description |
---|---|---|---|---|
0 |
fill_level | R |
0 |
24-bit FIFO fill level. Bits 24 to 31 are not used. |