參數(shù)資料
型號: LAN8700-AEZG
廠商: STANDARD MICROSYSTEMS CORP
元件分類: 微控制器/微處理器
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: 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, QCC36
封裝: 6 X 6 MM, 0.90 MM HEIGHT, GREEN, QFN-36
文件頁數(shù): 14/73頁
文件大?。?/td> 457K
代理商: LAN8700-AEZG
±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)
14
SMSC LAN8700/LAN8700I
DATASHEET
RX_CLK/
REGOFF
I/O
Receive Clock
: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Note:
This signal is not used in RMII Mode
Regulator Off
: Pulled up to VDDIO through a resistor at power
up event,(see
Section 4.9, "Internal +1.8V Regulator Disable," on
page 30
) will latch the internal 1.8v regulator off.
COL/
RMII/
CRS_DV
I/O
MII Mode Collision Detect
: Asserted to indicate detection of
collision condition.
RMII –
MII/RMII mode selection is latched on the rising edge of
the internal reset (nreset) based on the following strapping:
Float this pin for MII mode or pull-high with an external resistor
to VDDIO (see
Table 4.3, “Boot Strapping Configuration
Resistors,” on page 32
) to set the device in RMII mode.
See
Section 4.6.3, "MII vs. RMII Configuration," on page 26
for
more details.
RMII Mode CRS_DV (Carrier Sense/Receive Data Valid)
Asserted to indicate when the receive medium is non-idle. When
a 10BT packet is received, CRS_DV is asserted, but RXD[1:0] is
held low until the SFD byte (10101011) is received. In 10BT, half-
duplex mode, transmitted data is not looped back onto the
receive data pins, per the RMII standard.
CRS/
PHYAD4
I/O
Carrier Sense
: Indicates detection of carrier.
Note:
This signal is mux’d with PHYAD4
Table 3.2 LED Signals
SIGNAL NAME
TYPE
DESCRIPTION
SPEED100/
PHYAD0
I/O
LED1 –
SPEED100 indication. Active indicates that the selected
speed is 100Mbps. Inactive indicates that the selected speed is
10Mbps.
Note:
This signal is mux’d with PHYAD0
LINK/
PHYAD1
I/O
LED2 –
LINK ON indication. Active indicates that the Link
(100Base-TX or 10Base-T) is on.
Note:
This signal is mux’d with PHYAD1
ACTIVITY/
PHYAD2
I/O
LED3 –
ACTIVITY indication. Active indicates that there is
Carrier sense (CRS) from the active PMD.
Note:
This signal is mux’d with PHYAD2
FDUPLEX/
PHYAD3
I/O
LED4 –
DUPLEX indication. Active indicates that the PHY is in
full-duplex mode.
Note:
This signal is mux’d with PHYAD3
Table 3.1 MII Signals (continued)
SIGNAL NAME
TYPE
DESCRIPTION
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