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Networkin
g
Silicon — GD82559ER
4. GD82559ER Media Access Control Functional
Descri
p
tion
4.1 82559ER Initialization
The 82559ER has four sources for initialization. They are listed according to their precedence:
1. ALTRST# Signal
2. PCI RST# Signal
3. Software Reset (Software Command)
4. Selective Reset (Software Command)
4.1.1 Initialization Effects on 82559ER Units
The following table shows the effect of each of the different initialization sources on major
portions of the 82559ER. 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 PCI RST# but not necessarily by the selective reset.
ALTRST# PCI RST#
ISOLATE
#
D3 to D0
Transition
Software
Reset
Selective
Reset
EEPROM read and
initialization
333
-- -- --
Loadable microcode
decoded/reset
33
--
33
--
MAC confi
g
uration reset and
multicast hash
33333
--
Memor
y
pointers and
mircomachine state reset
33
--
333
PCI Confi
g
uration re
g
ister
reset
3333
-- --
PHY confi
g
uration reset
33
-- -- -- --
Power mana
g
ement event
reset
3
Clear onl
y
if no
auxiliar
y
power
present
-- -- -- --
Statistic counters reset
33
--
33
--