3.3.15. QoS Regulator Scale Factor Registers

The QoS Regulator Scale Factor Registers characteristics are:

Purpose

QoS regulation value, AWQOS or ARQOS, scale factor coded for powers of 2 in the range 2-5-2-12, to match a 16-bit integrator. One register exists for each slave interface.

Usage constraints

Accessible using only Secure accesses, unless you set the Secure Access Register. See Table 3.4.

Configurations

Only has an effect when QOSOVERRIDE is HIGH for the associated interface.

Attributes

Figure 3.13 shows the bit assignments.

Figure 3.14. QoS Regulator Scale Factor Register bit assignments

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Table 3.17 shows the bit assignments.

Table 3.17. QoS Regulator Scale Factor Register bit assignments

Bits

Reset

Access

Function

[31:11]

-

RAZ/WI

Reserved.

[10:8]

0x0

RW

ARQOS scale factor, power of 2 in the range 2-5-2-12.

[7:3]

-

RAZ/WI

Reserved.

[2:0]

0x0

RW

AWQOS scale factor, power of 2 in the range 2-5-2-12.


Table 3.18 shows the mapping of Scale Factor Register value to the scale factor.

Table 3.18. Mapping of Scale Factor Register value to Regulator scale factor

Scale Factor Register value

Scale factor

0x0

2-5

0x1

2-6

0x2

2-7

0x3

2-8

0x4

2-9

0x5

2-10

0x6

2-11

0x7

2-12


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