4.7.25
SYS_ENM_DDR1 Register
The SYS_ENM_DDR1 Register characteristics are:
Purpose
Contains a 64
‑
bit representation of the accumulated energy consumption of DDR 1.
Usage constraints
This register is read
‑
only.
Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.7.1 APB energy meter registers summary
Note
The value measured by this register is provisional and subject to characterization on the RevB boards.
The following table shows the bit assignments.
Table 4-161 SYS_ENM_DDR1 Register bit assignments
Bits
Name
Type
Function
[63:32] SYS_ENM_H_DDR1
RO
Most significant 32 bits of a 64
‑
bit representation of the
accumulated energy consumption of DDR 1:
•
The memory address offset of these bits is
0x0144
.
•
Accumulated energy =
(SYS_ENM_H_DDR1:SYS_ENM_L_DDR1)/6174020000
joules.
•
The
CB_nRST
reset signal resets the register to zero. The
register then updates every 100µs after the reset.
[31:0]
SYS_ENM_L_DDR1
RO
Least significant 32 bits of a 64
‑
bit representation of the
accumulated energy consumption of DDR 1:
•
The memory address offset of these bits is
0x0140
.
•
Accumulated energy =
(SYS_ENM_H_DDR1:SYS_ENM_L_DDR1)/6174020000
joules.
•
The
CB_nRST
reset signal resets the register to zero. The
register then updates every 100µs after the reset.
4 Programmers model
4.7 APB energy meter registers
101489_0000_02_en
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