9 Current value of Counter[63:32], CNTCVU

Reads or writes the upper 32 bits of the current counter value. The control interface must clear the CNTCR.EN bit or set CNTCR.HDBG and hlt_dbg asserted on the input to stop the counter, before writing to this register.

The CNTCVU register characteristics are:

Attributes
Offset

0x000C

Type

Read-write

Reset

0x00000000

Width

32

The following figure shows the bit assignments.

Figure 9-517 CNTCVU register bit assignments
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The following table shows the bit assignments.

Table 9-535 CNTCVU register bit assignments

Bits Reset value Name Function
[31:0] 0x0 CNTCVU32

Reads to this register return the upper 32 bits of the current timestamp counter value. To change the current timestamp value, write the lower 32 bits of the new value to CNTCVL before writing the upper 32 bits to this register. The 64-bit timestamp value is updated with the value from both writes when this register is written to.

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