82551QM Datasheet, PDF (66/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller

82551QM — Networking Silicon
9.1.22
Data Register
The data register is an 8-bit read only register that provides a mechanism for the 82551QM 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 listed in Table 22.
Table 22. Ethernet Data Register
Data Select Data Scale
Data Reported
0
1
2
3
4
5
6
7
8
9-15
2
D0 Power Consumption = 60 (600 mW)
2
D1 Power Consumption = 42 (420 mW)
2
D2 Power Consumption = 42 (420 mW)
2
D3 Power Consumption = 42 (420 mW)
2
D0 Power Dissipated = 60 (60 mW)
2
D1 Power Dissipated = 42 (420 mW)
2
D2 Power Dissipated = 42 (420 mW)
2
D3 Power Dissipated = 42 (420 mW)
2
Common Function Power Dissipated = 00
0
Reserved (00h)
9.2
Function 1: Modem PCI Configuration Space
In PCI and CardBus system, the 82551QM supports a dual function device: LAN/modem. The
LAN is defined as function zero, and the modem is defined as function one. The modem function is
active depending on the EEPROM setup.
Figure 21. Modem PCI Configuration Registers
Modem Configuration ID
00h
Modem Status
Modem Command
04h
Modem Revision ID
08h
BIST
Modem Header Type
Latency Timer
Cache Line Size 0Ch
Modem I/O Mapped Base Address Register
10h
Modem Memory Mapped Base Address Register
14h
Reserved Base Address Register
18h
Reserved Base Address Register
1Ch
Reserved Base Address Register
20h
Reserved Base Address Register
24h
Reserved (PCI mode)/Modem CIS Pointer (CardBus mode)
28h
Modem Subsystem ID
Modem Subsystem Vendor ID
2Ch
Expansion ROM Base Address Register
30h
Reserved
Cap_Ptr
34h
60
Datasheet