參數(shù)資料
型號： LAN8700
廠商： SMSC Corporation
英文描述： 【15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR TM in a Small Footprint
中文描述： 【15kV的ESD保護(hù)信息產(chǎn)業(yè)部/ RMII快速的HP Auto - MDIX功能和SMSC flexPWR商標(biāo)以太網(wǎng)PHY在小尺寸
文件頁數(shù)： 16/73頁
文件大?。?/td> 457K
代理商： LAN8700
±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR
TM
in a Small Footprint
Datasheet
Revision 1.0 (02-09-07)
16
SMSC LAN8700/LAN8700I
DATASHEET
Note 3.1
On nRST transition high, the PHY latches the state of the configuration pins in this table.
RXD3/
nINTSEL
I/O
nINT pin mode select:
set the mode of pin 1.
Default, left floating pin 1 is nINT, active low interrupt output.
Notes:
For nINT mode, tie nINT/TXD4/TXER to VDDIO with a
resistor (see
Table 4.3, “Boot Strapping Configuration Resistors,”
on page 32
).
Pulled to VSS by a resistor, (see
Table 4.3, “Boot Strapping
Configuration Resistors,” on page 32
) pin 1 is TX_ER/TXD4,
Transmit Error or Transmit data 4 (5B mode).
Notes:
For TXD4/TXER mode, do not tie nINT/TXD4/TXER to
VDDIO or Ground.
Table 3.5 General Signals
SIGNAL NAME
TYPE
DESCRIPTION
nINT/
TX_ER/
TXD4
I/O
LAN Interrupt
– Active Low output. Place an external resistor
(see
Table 4.3, “Boot Strapping Configuration Resistors,” on
page 32
) pull-up to VCC 3.3V.
Notes:
This signal is mux’d with TXER/TXD4
See
Section 4.10, "nINT/TX_ER/TXD4 Strapping," on page 30
for additional details on Strapping options.
nRST
I
External Reset
– input of the system reset. This signal is active
LOW.
CLKIN/
XTAL1
I/O
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, "nINT/TX_ER/TXD4 Strapping," on
page 30
for additional details on Strapping options.
XTAL2
O
Clock Output
– 25 MHz crystal output.
Note:
Float this pin if using an external clock being driven
through CLKIN/XTAL1
Table 3.4 Boot Strap Configuration Inputs (
Note 3.1
)
SIGNAL NAME
TYPE
DESCRIPTION
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