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GD82559ER — Networkin
g
Silicon
56
Datasheet
7.1.20 Data Re
g
ister
The data register is an 8-bit read only register that provides a mechanism for the 82559ER to report
state dependent maximum power consumption and heat dissipation. The value reported in this
register depends on the value written to the Data Select field in the PMCSR register. The power
measurements defined in this register have a dynamic range of 0 to 2.55 W with 0.01 W resolution
according to the Data Scale. The value in this register is hard coded in the silicon. The structure of
the data register is presented below.
Table 10. Ethernet Data Re
g
ister
Data Select Data Scale Data Reported
0 2 D0 Power Consumption = 60
(
600 mW
)
1 2 D1 Power Consumption = 42
(
420 mW
)
2 2 D2 Power Consumption = 42
(
420 mW
)
3 2 D3 Power Consumption = 42
(
420 mW
)
4 2 D0 Power Dissipated = 58
(
580 mW
)
5 2 D1 Power Dissipated = 40
(
400 mW
)
6 2 D2 Power Dissipated = 40
(
400 mW
)
7 2 D3 Power Dissipated = 40
(
400 mW
)
8 2 Common Function Power Dissipated = 00
9-15 0 Reserved
(
00H
)