SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The EMIF module contains the following FIFOs:
Figure 15-50 shows the overall architecture of the EMIF FIFOs.
Table 15-71 lists the allocation of the entries.
Parameter | System Local Interface Entries | MPU Local Interface Entries |
---|---|---|
Pre Command FIFO | 6 | 4 |
Command FIFO | Programmable (1) | Programmable (1) |
Pre Write FIFO | 6 | 8 |
Write Data FIFO (256-bit) | Up to (19 × 256 bits) + 6 | Up to 19 + 8 |
Return Command FIFO | 22 | 24 |
SDRAM Read Data FIFO | 22 | 24 |
Register Read Data FIFO | 2 | 0 |
The command FIFO is shared between the two local interfaces, whereas there are two different FIFOs for every other type, one dedicated to each local interface.
The command FIFO stores all the commands coming in on the local command interface. The allocation of entries in the command FIFO is programmable per local interface using the following bit fields: