3.2.1. Configuration Register

The configuration Register characteristics are:

Purpose

Provides information about the configuration of the TZASC.

Usage constraints

There are no usage constraints.

Configurations

Available in all configurations of the TZASC.

Attributes

See the register summary in Table 3.1.

Figure 3.2 shows the configuration Register bit assignments.

Figure 3.2. configuration Register bit assignments


Table 3.2 shows the configuration Register bit assignments.

Table 3.2. configuration Register bit assignments

BitsNameFunction
[31:14]-Reserved, Should be Zero (SBZ).
[13:8]address_width

Returns the width of the AXI address bus. Read as:

b000000-b011110 = reserved

b011111 = 32-bit

b100000 = 33-bit

b100001 = 34-bit

.

.

.

b111110 = 63-bit

b111111 = 64-bit.

[7:4]-Reserved, SBZ.
[3:0]no_of_regions

Returns the number of regions that the TZASC provides:

b0000 = reserved

b0001 = 2 regions

b0010 = 3 regions

b0011 = 4 regions

  .

  .

  .

b1111 = 16 regions.


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