LAN8187_06 Datasheet, PDF (16/72 Pages) SMSC Corporation – ±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWRTM

±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR^TM
Datasheet
Table 3.5 General Signals (continued)
SIGNAL NAME
CLKIN/XTAL1
XTAL2
GPO2
GPO1
GPO0/RMII
TYPE
I
O
O
O
I/O
DESCRIPTION
Clock Input – 25 Mhz or 50 MHz external clock or crystal input.
In MII mode, this signal is the 25 MHz reference input clock
In RMII mode, this signal is the 50 MHz reference input clock
which is typically also driven to the RMII compliant Ethernet MAC
clock input.
Note: See Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
page 31 for additional details on Strapping options.
Clock Output – 25 MHz crystal output.
Note:
See Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
page 31 for additional details on Strapping options.
Also, float this pin if using an external clock being
driven through CLKIN/XTAL1
General Purpose Output 2 – General Purpose Output signal
Driven by bits in registers 27 and 31.
General Purpose Output 1 – General Purpose Output signal
Driven by bits in registers 27 and 31. This signal is mux’d with
PHYAD4.
General Purpose Output 0 – General Purpose Output signal.
Driven by bits in registers 27 and 31.
RMII – MII/RMII mode selection is latched on the rising edge of
nRST based on the following strapping:
Float the GPO0 pin for MII mode or pull-high with an external
resistor to VDDIO to set the device in RMII mode. See Table 4.4,
“Boot Strapping Configuration Resistors,” on page 32
Note: See Section 4.6.3, "MII vs. RMII Configuration," on
page 26 for more details.
SIGNAL NAME
TXP
TXN
RXP
RXN
Table 3.6 10/100 Line Interface
TYPE
AO
AO
AI
AI
DESCRIPTION
Transmit Data: 100Base-TX or 10Base-T differential transmit
outputs to magnetics.
Transmit Data: 100Base-TX or 10Base-T differential transmit
outputs to magnetics.
Receive Data: 100Base-TX or 10Base-T differential receive
inputs from magnetics.
Receive Data: 100Base-TX or 10Base-T differential receive
inputs from magnetics.
SIGNAL NAME
SMSC LAN8187/LAN8187I
Table 3.7 Analog References
TYPE
DESCRIPTION
16
DATASHEET
Revision 1.0 (12-14-06)