2.2.5. Filtering Start Address Register

The Filtering Start Address Register characteristics are:

Purpose

Provides the start address for use with master port 1 in a two-master port configuration.

Usage constraints

This register is writable:

  • in Secure state if the relevant bit in the SAC register is set.

  • in Non-secure state if the relevant bits in the SAC and SNSAC registers are set.

Configurations

Available in all two-master port configurations. When only one master port is present these registers are not implemented. Writes have no effect and reads return a value 0x0 for all filtering registers.

Attributes

See the register summary in Table 2.1.

Figure 2.5 shows the Filtering Start Address Register bit assignments.

Figure 2.5. Filtering Start Address Register bit assignments

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Table 2.6 shows the Filtering Start Address Register bit assignments.

Table 2.6. Filtering Start Address Register bit assignments

Bits Name Function
[31:20]Filtering start address

Start address for use with master port 1 in a two-master port configuration when address filtering is enabled.

The default value is the value of FILTERSTART sampled on exit from reset. The value on the pin gives the upper address bits with 1MB granularity.

[19:0]-SBZ

See Configuration signals.

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