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LAN8820I bảng dữ liệu(PDF) 6 Page - Microchip Technology

tên linh kiện LAN8820I
Giải thích chi tiết về linh kiện  RGMII 10/100/1000 Ethernet Transceiver
PDF  83 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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LAN8820/LAN8820I
DS00001871B-page 6
 2009-2015 Microchip Technology Inc.
Note 2-1
Configuration strap values are latched on hardware reset. Configuration straps are identified by an
underlined symbol name. Signals that function as configuration straps must be augmented with an
external resistor when connected to a load. Refer to Section 3.8, "Configuration," on page 23 for
additional information.
TABLE 2-1:
RGMII INTERFACE PINS
Num
Pins
Name
Symbols
Buffer
Type
Description
1
Transmit Data 0
TXD0
IS
(PD)
The MAC transmits data to the PHY using this
signal.
1
Transmit Data 1
TXD1
IS
(PD)
The MAC transmits data to the PHY using this
signal.
1
Transmit Data 2
TXD2
IS
(PD)
The MAC transmits data to the PHY using this
signal.
1
Transmit Data 3
TXD3
IS
(PD)
The MAC transmits data to the PHY using this
signal.
1
Transmit
Control
TXCTRL
IS
(PD)
Indicates both the transmit data enable (TXEN) and
transmit error (TXER) functions per the RGMII
specification.
1
Transmit Clock
TXC
IS
(PD)
Used to latch data from the MAC into the PHY.
1000BASE-T: 125MHz
100BASE-TX: 25MHz
10BASE-T: 2.5MHz
1
Receive Data 0
RXD0
O6
The PHY transfers data to the MAC using this
signal.
1
Receive Data 1
RXD1
O6
The PHY transfers data to the MAC using this
signal.
1
Receive Data 2
RXD2
O6
The PHY transfers data to the MAC using this
signal.
1
Receive Data 3
RXD3
O6
The PHY transfers data to the MAC using this
signal.
1
Receive Control
RXCTRL
O6
Indicates both the receive data valid (RXDV) and
receive error (RXER) functions per the RGMII
specification.
1
Receive Clock
RXC
O6
Used to transfer data to the MAC.
1000BASE-T: 125MHz
100BASE-TX: 25MHz
10BASE-T: 2.5MHz



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