9 Peripheral Identification Register 4, PIDR4

The PIDR4 register is part of the set of peripheral identification registers.

The PIDR4 register characteristics are:









The following figure shows the bit assignments.

Figure 9-152 PIDR4 register bit assignments
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The following table shows the bit assignments.

Table 9-158 PIDR4 register bit assignments

Bits Reset value Name Function
[31:8] 0x0 RES0

Reserved bit or field with Should-Be-Zero-or-Preserved (SBZP) behavior.

[7:4] 0b0000 SIZE

Indicates the memory size that is used by this component. Returns 0 indicating that the component uses an UNKNOWN number of 4KB blocks. Using the SIZE field to indicate the size of the component is deprecated.

[3:0] 0b0100 DES_2

JEP106 continuation code. Together, with PIDR2.DES_1 and PIDR1.DES_0, they indicate the designer of the component and not the implementer, except where the two are the same.

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