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Programmers Model

ID062813 Non-Confidential

Test chip SCC Register APB_CLEAR

The APB_CLEAR Register characteristics are:

Purpose Write

0x000A50F5 to the

APB_CLEAR register to revert all SCC registers

to their test chip default values.

Usage constraints There are no usage constraints.

Configurations Not applicable.

Attributes See Table 3-6 on page 3-13.

Figure 3-27 shows the bit assignments.

Figure 3-27 Test chip APB_CLEAR Register bit assignments

[11] CA15_WFE_NOP_ENABLE Recommends boot firmware or operating system action:

Do not treat WFEs as NOPs.

Treat WFEs as NOPs.

The default is

This bit has no direct effect but when it is

it acts as a hint to

the software, such as the boot software, to enable bit[7] of the

CA15 Auxiliary Control Register for each core in the CA15.

This results in WFE instructions being executed as NOP

instructions.

See Cortex

-A15 Technical Reference Manual.

Note

You can use this method as an alternative to the work-around

to the Cortex A15_A7 defect that bit[14] of this register

describes.

[10:2] - Reserved. Do not modify.

[1:0] ACTIVE_CLUSTER[1:0] Denotes the active clusters:

b01

The Cortex-A15 cluster is active and the

Cortex-A7 cluster is inactive.

b10

The Cortex-A15 cluster is inactive and the

Cortex-A7 cluster is active.

b11

The Cortex-A15 cluster is active and the

Cortex-A7 cluster is active

The default is

b11

Table 3-28 Test chip CFGREG48 Register bit assignments (continued)

Bits Name Function

31 0

0 00000 0 0000000000000 0000 000000 00

APBCLEAR

24 23 16 15 8 7

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 177 178

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