82551QM Datasheet, PDF (21/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller

Networking Silicon — 82551QM
5.0
Media Access Control Functional Description
5.1
Device Initialization
The 82551QM has six sources for initialization. They are listed according to their precedence:
1. Internal Power-on Reset (POR)
2. ALTRST# pin
3. RST# pin
4. ISOLATE# pin
5. Software Reset (Software Command)
6. Selective Reset (Software Command)
5.1.1
Initialization Effects
The following table lists the effect of each of the different initialization sources on major portions
of the 82551QM. The initialization sources are listed in order of precedence. For example, any
resource that is initialized by the software reset is also initialized by the D3 to D0 transition and
ALTRST# and RST# but not necessarily by the selective reset.
Table 11. Initialization Effects
EEPROM read
and initialization
Loadable
microcode
decoded/reset
MAC
configuration
reset and
multicast hash
Memory
pointers and
mircomachine
state reset
PCI
Configuration
register reset
PHY
configuration
reset
Internal
POR
?
?
?
?
?
?
ALTRST#
?
?
?
?
?
?
RST#
?
?
?
?
?
?
ISOLATE#
D3 to D0
Transition
Software
Reset
Selective
Reset
?
--
--
--
?
?
?
--
?
?
?
--
?
?
?
?
?
?
--
--
--
--
--
--
Datasheet
15