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Home > Programmers Model > Register descriptions > Feedback Controlled Scale Register |
The ki_fc Register characteristics are:
This register enables you to program a latency regulation value, AWQOS or ARQOS, scale factor coded for powers of 2 in the range 2-3 to 2-10, to match a 16-bit integrator. See Transaction latency regulation and Address request period regulation for more information.
There are no usage constraints.
Only available when you select latency regulation in AMBA Designer.
See Table 3.1.
Figure 3.11 shows the bit assignments.
Table 3.12 shows the bit assignments.
Table 3.12. ki Register bit assignments
Bits | Name | Function |
---|---|---|
[31:11] | - | Reserved. Do not modify. Read as zero. |
[10:8] | ar_ki | ARQOS scale factor, power of 2 in the range 2-3 to 2-10. |
[7:3] | - | Reserved. Do not modify. Read as zero. |
[2:0] | aw_ki | AWQOS scale factor, power of 2 in the range 2-3 to 2-10. |
Table 3.13 defines the translation from the programmed value to the scale factor used to derive the QoS value from the latency integrator. See Transaction latency regulation and Address request period regulation for more information.
Table 3.13. Latency regulation scale factor translation
Latency regulation value | Latency regulation scale factor |
---|---|
0x0 | 2-3 |
0x1 | 2-4 |
0x2 | 2-5 |
0x3 | 2-6 |
0x4 | 2-7 |
0x5 | 2-8 |
0x6 | 2-9 |
0x7 | 2-10 |