LAN8820 Datasheet, PDF (6/83 Pages) Microchip Technology – RGMII 10/100/1000 Ethernet Transceiver

LAN8820/LAN8820I
TABLE 2-1: RGMII INTERFACE PINS
Num
Pins
Name
1
Transmit Data 0
1
Transmit Data 1
1
Transmit Data 2
1
Transmit Data 3
Transmit
1
Control
Transmit Clock
1
1
Receive Data 0
1
Receive Data 1
1
Receive Data 2
1
Receive Data 3
Receive Control
1
Receive Clock
1
Symbols
TXD0
TXD1
TXD2
TXD3
TXCTRL
TXC
RXD0
RXD1
RXD2
RXD3
RXCTRL
RXC
Buffer
Type
IS
(PD)
IS
(PD)
IS
(PD)
IS
(PD)
IS
(PD)
IS
(PD)
O6
O6
O6
O6
O6
O6
Description
The MAC transmits data to the PHY using this
signal.
The MAC transmits data to the PHY using this
signal.
The MAC transmits data to the PHY using this
signal.
The MAC transmits data to the PHY using this
signal.
Indicates both the transmit data enable (TXEN) and
transmit error (TXER) functions per the RGMII
specification.
Used to latch data from the MAC into the PHY.
1000BASE-T: 125MHz
100BASE-TX: 25MHz
10BASE-T: 2.5MHz
The PHY transfers data to the MAC using this
signal.
The PHY transfers data to the MAC using this
signal.
The PHY transfers data to the MAC using this
signal.
The PHY transfers data to the MAC using this
signal.
Indicates both the receive data valid (RXDV) and
receive error (RXER) functions per the RGMII
specification.
Used to transfer data to the MAC.
1000BASE-T: 125MHz
100BASE-TX: 25MHz
10BASE-T: 2.5MHz
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.
DS00001871B-page 6
 2009-2015 Microchip Technology Inc.