25.8.7 Quality of Service Control

Name: QOSCTRL
Offset: 0x0E
Reset: 0x2A
Property: PAC Write-Protection

Bit 76543210 
   DQOS[1:0]FQOS[1:0]WRBQOS[1:0] 
Access R/WR/WR/WR/WR/WR/W 
Reset 101010 

Bits 5:4 – DQOS[1:0] Data Transfer Quality of Service

These bits define the memory priority access during the data transfer operation.

DQOS[1:0] Name Description
0x0 DISABLE Background (no sensitive operation)
0x1 LOW Sensitive Bandwidth
0x2 MEDIUM Sensitive Latency
0x3 HIGH Critical Latency

Bits 3:2 – FQOS[1:0] Fetch Quality of Service

These bits define the memory priority access during the fetch operation.

FQOS[1:0] Name Description
0x0 DISABLE Background (no sensitive operation)
0x1 LOW Sensitive Bandwidth
0x2 MEDIUM Sensitive Latency
0x3 HIGH Critical Latency

Bits 1:0 – WRBQOS[1:0] Write-Back Quality of Service

These bits define the memory priority access during the write-back operation.

WRBQOS[1:0] Name Description
0x0 DISABLE Background (no sensitive operation)
0x1 LOW Sensitive Bandwidth
0x2 MEDIUM Sensitive Latency
0x3 HIGH Critical Latency