Pin Description; Power Management/Isolation Interface - Realtek RTL8169 Manual

5. Pin Description

In order to reduce pin count, and therefore size and cost, some pins have multiple functions. In those cases, the functions are
separated with a "/" symbol. Refer to the Pin Assignment diagram for a graphical representation.

5.1 Power Management/Isolation Interface

Symbol Type
PMEB O/D
(PME#)
ISOLATEB I
(ISOLATE#)
LWAKE/ O
CSTSCHG
2002/03/27
Pin No
87 Power Management Event: Open drain, active low. Used by the
RTL8169 to request a change in its current power management state
and/or to indicate that a power management event has occurred.
172
Isolate Pin: Active low. Used to isolate the RTL8169 from the PCI bus.
The RTL8169 does not drive its PCI outputs (excluding PME#) and
does not sample its PCI input (including RST# and PCICLK) as long as
the Isolate pin is asserted.
88 LAN WAKE-UP Signal (When CardB_En=0, bit2 Config3): This
signal is used to inform the motherboard to execute the wake-up
process. The motherboard must support Wake-On-LAN (WOL). There
are 4 choices of output, including active high, active low, positive pulse,
and negative pulse, that may be asserted from the LWAKE pin. Please
refer to LWACT bit in CONFIG1 register and LWPTN bit in CONFIG4
register for the setting of this output signal. The default output is an
active high signal. Once a PME event is received, the LWAKE and
PMEB assert at the same time when the LWPME (bit4, CONFIG4) is
set to 0. If the LWPME is set to 1, the LWAKE asserts only when the
PMEB asserts and the ISOLATEB is low.
CSTSCHG Signal (When CardB_En=1, bit2 Config3): This signal is
used in CardBus applications only and is used to inform the
motherboard to execute the wake-up process whenever a PME event
occurs. This is always an active high signal, and the setting of LWACT
(bit 4, Config1), LWPTN (bit2, Config4), and LWPME (bit4, Config4)
means nothing in this case.
This pin is a 3.3V signaling output pin.
Description
6
RTL8169
Rev.1.21