High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 3.4 Configuration Inputs
PIN NO.
SIGNAL NAME
PHYAD4
TYPE
DESCRIPTION
2
I
I
I
I
I
I
PHY Address Bit 4: set the default address of the PHY.
PHY Address Bit 3: set the default address of the PHY.
PHY Address Bit 2: set the default address of the PHY.
PHY Address Bit 1: set the default address of the PHY.
PHY Address Bit 0: set the default address of the PHY.
20
19
17
16
6
PHYAD3
PHYAD2
PHYAD1
PHYAD0
MODE2
PHY Operating Mode Bit 2: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 42 for the MODE options.
5
4
MODE1
MODE0
I
I
PHY Operating Mode Bit 1: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 42 for the MODE options.
PHY Operating Mode Bit 0: set the default MODE of the
PHY. See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on
page 42 for the MODE options.
10
9
TEST1
I
I
I
Test Mode Select 1: Must be left floating.
Test Mode Select 0: Must be left floating.
TEST0
12
REG_EN
Internal +1.8V Regulator Enable:
+3.3V – Enables internal regulator.
0V – Disables internal regulator.
Table 3.5 General Signals
TYPE
PIN NO.
SIGNAL NAME
DESCRIPTION
46
25
nINT
OD
I
LAN Interrupt – Active Low output.
nRST
External Reset – input of the system reset. This signal is
active LOW.
23
22
11
CLKIN/XTAL1
XTAL2
I
Clock Input – 25 MHz external clock or crystal input.
Clock Output – 25 MHz crystal output.
O
I
CLK_FREQ
Clock Frequency – define the frequency of the input
clock CLKIN
0 – Clock frequency is 25 MHz.
1 – Reserved.
This input needs to be held low continuously, during and
after reset. This pin should be pulled-down to VSS via a
pull-down resistor.
64
3
NC1
No Connect
GPO2
O
O
General Purpose Output 2 – General Purpose Output
signal Driven by bits in registers 27 and 31.
2
GPO1
General Purpose Output 1 – General Purpose Output
signal Driven by bits in registers 27 and 31.
(Muxed with PHYAD4 signal)
SMSC LAN83C185
7
Rev. 0.6 (12-12-03)
DATASHEET
SMSC [ SMSC CORPORATION ]
