
21145
8
Preliminary
Datasheet
gep<2>
/
rcv_match/
wake
I/O
125
102
This pin can be configured by software to be:
A general-purpose pin that performs either input or
output functions.
A status pin that provides an LED that indicates a
receive packet has passed address recognition.
This pin can also be controlled by PME_Enable bit
(Func0_HwOptions<3>) in the serial ROM to be a wake-
up event pin that can be connected to pin pme# of the
PCI connector or pin cstschg of the CardBus connector.
When this pin is in a wake function, bit
MiscHwOptions<1> in the serial ROM determines the
polarity.
gep<3>/link
I/O
126
103
This pin can be configured by software to be:
A general-purpose pin that performs either input or
output functions.
A status pin that provides an LED to indicate
(according to the MiscHWOptions<0> field in the
Serial ROM):
— Network link integrity state for 10BASE-T or
100BASE-TX.
— Both network activity and network link integrity
state.
An input link status pin for OnNow support. When
used with an MII PHY device, this pin should be
connected to the MII PHY link indication pin (the
21145 interprets a high logic level on this pin as link-
pass).
This pin should not be left unconnected if it is used as an
input in the D1, D2, or D3 power states.
gnt_l
I
29
21
Bus grant asserts to indicate to the 21145 that access to
the bus is granted.
hr_rx_n
I
175
143
HomePNA negative differential receive input from the
phone line.
hr_rx_p
I
174
142
HomePNA positive differential receive input from the
phone line.
hr_txn
O
12
12
HomePNA negative differential transmit output to phone
line.
hr_txnh
O
14
14
HomePNA high power negative differential transmit
output to phone line.
hr_txp
O
11
11
HomePNA positive differential transmit output to phone
line.
hr_txph
O
13
13
HomePNA high power positive differential transmit output
to phone line.
idsel
I
42
34
Initialization device select asserts to indicate that the host
is issuing a configuration cycle to the 21145.
Table 1. Functional Description of 21145 Signals (Sheet 3 of 8)
Signal
Type
Pin
Number,
176-pin
Pin
Number,
144-pin
Description