9 Data Link Protocol Identification Register, DLPIDR

The DLPIDR provides protocol version information. The contents of this register are DATA LINK DEFINED.

The DLPIDR register characteristics are:

Attributes
Offset

0x0004

Type

Read-only

Reset

0x000000001

Width

32

The following figure shows the bit assignments.

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

Table 9-10 DLPIDR register bit assignments

Bits Reset value Name Function
[31:28] 0b0000 TINSTANCE

The instance number for this device. For JTAG-DP: Reserved, RES0, and for SW-DP: The value comes from the tie-off signal instanceid[3:0]. Must be unique in a multi-drop system.

[3:0] 0b0001 PROTVSN

Defines the protocol version that is implemented. For JTAG-DP: 0x1, as JTAG protocol version 1 is implemented, and for SW-DP: 0x1 as SW protocol version 2 is implemented.

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