Related concepts
4.5.1 APB energy register summary
4.5.7
SYS_V_A72 Register
The SYS_V_A72 Register characteristics are:
Purpose
Contains a 12-bit representation of the instantaneous supply voltage of the Cortex-A72 cluster.
Usage constraints
This register is read-only.
Configurations
Available in all V2M-Juno r2 motherboard configurations.
The following figure shows the bit assignments.
31
0
Reserved
11
12
SYS_V_A72
Figure 4-25 SYS_V_A72 Register bit assignments
The following table shows the bit assignments.
Table 4-29 SYS_V_A72 Register bit assignments
Bits
Name
Function
[31:12] -
Reserved. If you read this register, you must ignore these bits.
[11:0]
SYS_V_A72 12-bit representation of the instantaneous supply voltage of the Cortex-A72 cluster:
•
Full scale measurement, 4096, represents 2V5. Full scale is
0xFFF
.
•
Measured voltage = (SY1)/1622 volts.
•
The
CB_nRST
reset signal resets the register to zero. The register then updates every 100µs after the
reset.
Related concepts
4.5.1 APB energy register summary
4.5.8
SYS_V_A53 Register
The SYS_V_A53 Register characteristics are:
Purpose
Contains a 12-bit representation of the instantaneous supply voltage of the Cortex-A53 cluster.
Usage constraints
This register is read-only.
Configurations
Available in all V2M-Juno r2 motherboard configurations.
The following figure shows the bit assignments.
31
0
Reserved
11
12
SYS_V_A53
Figure 4-26 SYS_V_A53 Register bit assignments
The following table shows the bit assignments.
4 Programmers Model
4.5 APB energy meter registers
ARM 100114_0200_03_en
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