ARM AMBA NIC-301 Especificações descarregar pdf (Página 136)

Programmers Model

ID062813 Non-Confidential

Table 3-72 shows the bit assignments.

CNTFRQ

The CNTFRQ Register characteristics are:

Purpose Denotes the number of clock frequency and enables you to read and write

the clock frequency.

Usage constraints There are no usage constraints.

Configurations Not applicable.

Attributes See Table 3-68 on page 3-76.

Table 3-73 shows the bit assignments.

CNTPL0ACR

The CNTPL0ACR Register characteristics are:

Purpose Second view access control that enables you to read and write second view

access control.

Usage constraints There are no usage constraints.

Configurations Not applicable.

Attributes See Table 3-68 on page 3-76.

Figure 3-51 shows the bit assignments.

Figure 3-51 System timer CNTPL0ACR Register bit assignments

Table 3-74 shows the bit assignments.

Table 3-72 System timer CNTUVCT Register bit assignments

Bits Name Function

[31:0] CNTUVCT Virtual count register upper 32 bits, physical count, virtual offset

Table 3-73 System timer CNTFRQ Register bit assignments

Bits Name Function

[31:0] CNTFRQ Clock frequency, read only from second ‘user’ view when access is enabled.

31 0

0 00000 0 000000000000 0000 000000 00

CNTPL0ACR

Table 3-74 System timer CNTPL0ACR Register bit assignments

Bits Name Function

[31:0] CNTPL0ACR Second view access control. This register is only visible in the first kernel view.

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 177 178

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ARM AMBA NIC-301 Especificações Página 136