ARM AMBA NIC-301 Especificações descarregar pdf (Página 121)

Programmers Model

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Figure 3-31 System counter CNTCVL Control Register bit assignments

Table 3-45 shows the bit assignments.

CNTCVU

The CNTCVU Register characteristics are:

Purpose System counter upper 32 bits control register that enables you to read and

write the system counter upper 32 bits.

Usage constraints There are no usage constraints.

Configurations Not applicable.

Attributes See Table 3-43 on page 3-62.

Figure 3-32 shows the bit assignments.

Figure 3-32 System counter CNTCVU Control Register bit assignments

Table 3-46 shows the bit assignments.

CNTFID0

The CNTFID0 Register characteristics are:

Purpose System counter base frequency ID control register that enables you to read

and write the counter frequency.

Usage constraints There are no usage constraints.

31 0

0 00000 0 000000000000 0000 000000 00

CNTCVL

Table 3-45 System counter CNTCVL Control Register bit assignments

Bits Name Function

[31:0] CNTCVL Current unencoded value of counter lower 32 bits, CNTCV[31:0]:

Counter disabled Writes to this register pre-load the lower 32 bits of the counter.

Counter enabled The counter ignores writes to this register.

The default is

0x0000_0000

31 0

0 00000 0 000000000000 0000 000000 00

CNTCVU

Table 3-46 System counter CNTCVU Control Register bit assignments

Bits Name Function

[31:0] CNTCVU Current unencoded value of counter upper 32 bits, CNTCV[63:32]:

Counter disabled Writes to this register pre-load the upper 32 bits of the counter.

Counter enabled The Counter ignores writes to this register.

The default is

0x0000_0000

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 177 178

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