參數(shù)資料
型號(hào)： LAN8187-JT
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 微控制器/微處理器
英文描述： High-Performance MII and RMII 10/100 Ethernet PHY with HP Auto-MDIX
中文描述： 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, TQFP-64
文件頁(yè)數(shù)： 16/66頁(yè)
文件大?。?/td> 545K
代理商： LAN8187-JT
High-Performance MII and RMII 10/100 Ethernet PHY with HP Auto-MDIX
Datasheet
Revision 0.6 (02-24-06)
16
SMSC LAN8187/LAN8187I
DATASHEET
CLKIN/XTAL1
I
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 30
for additional details on Strapping options.
XTAL2
O
Clock Output
– 25 MHz crystal output.
Note:
See
Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
page 30
for additional details on Strapping options.
Also, float this pin if using an external clock being
driven through CLKIN/XTAL1
GPO2
O
General Purpose Output 2 –
General Purpose Output signal
Driven by bits in registers 27 and 31.
GPO1
O
General Purpose Output 1 –
General Purpose Output signal
Driven by bits in registers 27 and 31. This signal is mux’d with
PHYAD4.
GPO0/MII
I/O
General Purpose Output 0 –
General Purpose Output signal.
Driven by bits in registers 27 and 31.
MII –
MII/RMII mode selection is latched on the rising edge of
the internal reset (nreset) based on the following strapping:
Float the GPO0 pin for MII mode or pull-high with an external
(see
Table 4.3, “Boot Strapping Configuration Resistors,” on
page 32
) resistor to VDDIO to set the device in RMII mode.
Note:
See
Section 4.6.3, "MII vs. RMII Configuration," on
page 26
for more details.
Table 3.6 10/100 Line Interface
SIGNAL NAME
TYPE
DESCRIPTION
TXP
AO
Transmit Data
: 100Base-TX or 10Base-T differential transmit
outputs to magnetics.
TXN
AO
Transmit Data
: 100Base-TX or 10Base-T differential transmit
outputs to magnetics.
RXP
AI
Receive Data
: 100Base-TX or 10Base-T differential receive
inputs from magnetics.
RXN
AI
Receive Data
: 100Base-TX or 10Base-T differential receive
inputs from magnetics.
Table 3.7 Analog References
SIGNAL NAME
TYPE
DESCRIPTION
EXRES1
AI
Connects to reference resistor of value 12.4K-Ohm, 1%
connected as described in the Analog Layout Guidelines.
Table 3.5 General Signals (continued)
SIGNAL NAME
TYPE
DESCRIPTION
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