System bus mode register
| FB | Fixed Burst Length When this bit is set to 1, the AHB master will initiate burst transfers of specified length (INCRx or SINGLE). When this bit is set to 0, the AHB master will initiate transfers of unspecified length (INCR) or SINGLE transfers. |
| AAL | Address-Aligned Beats When this bit is set to 1, the master performs address-aligned burst transfers on Read and Write channels. |
| MB | Mixed Burst When this bit is set high and the FB bit is low, the AHB master performs undefined bursts transfers (INCR) for burst length of 16 or more. For burst length of 16 or less, the AHB master performs fixed burst transfers (INCRx and SINGLE). |
| RB | Rebuild INCRx Burst When this bit is set high and the AHB master gets SPLIT, RETRY, or Early Burst Termination (EBT) response, the AHB master interface rebuilds the pending beats of any initiated burst transfer with INCRx and SINGLE transfers. By default, the AHB master interface rebuilds pending beats of an EBT with an unspecified (INCR) burst. |