LAN8187_06 SMSC [SMSC Corporation], LAN8187_06 Datasheet - Page 16

• Manufacturer Part Number: LAN8187_06
• Manufacturer: SMSC [SMSC Corporation]

±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR
Datasheet
SMSC LAN8187/LAN8187I
SIGNAL NAME
SIGNAL NAME
SIGNAL NAME
CLKIN/XTAL1
GPO0/RMII
XTAL2
GPO2
GPO1
RXN
TXN
RXP
TXP
Table 3.5 General Signals (continued)
TYPE
TYPE
TYPE
AO
AO
I/O
Table 3.6 10/100 Line Interface
AI
AI
O
O
O
Table 3.7 Analog References
I
DATASHEET
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:
Clock Output – 25 MHz crystal output.
Note:
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
“Boot Strapping Configuration Resistors,” on page 32
Note:
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.
16
See
page 31
See
page 31
Also, float this pin if using an external clock being
driven through CLKIN/XTAL1
See
page 26
Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
Section 4.6.3, "MII vs. RMII Configuration," on
for additional details on Strapping options.
for additional details on Strapping options.
for more details.
TM
DESCRIPTION
DESCRIPTION
DESCRIPTION
Revision 1.0 (12-14-06)
Table 4.4,