Realtek RTL8201(L), Manual

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RTL8201(L)
2002-01-18 Rev.1.04
6
5.4 100Mbps Network Interface
Symbol Type Pin(s) No. Description
TPTX+
TPTX- O
O 34
33 Transmit Output
RTSET I 28 Transmit bias resistor connection: This pin should be pulled to GND by a
2.0K resistor.
TPRX+
TPRX- I
I 31
30 Receive input
5.5 Device Configuration Interface
Symbol Type Pin(s) No. Description
ISOLATE I 43 Set high to isolate the RTL8201(L) from the MAC. This will also isolate the
MDC/MDIO management interface. In this mode, the power consumption is
minimum.
RPTR/RTT2 I 40 Set high to put the RTL8201(L) into repeater mode. In test mode, this pin is
re-defined as RTT2.
SPEED I 39 Set high to put the RTL8201(L) into 100Mbps operation
DUPLEX I 38 Set high to enable full duplex
ANE I 37 Set high to enable Auto-negotiation mode, set low to force mode
LDPS I 41 Set high to put the RTL8201(L) into LDPS mode,
MII/SNIB/T
XD5(test) I 44 Pull high to set the RTL8201(L) into MII mode operation
5.6 LED Interface/PHY Address Config
Symbol Type Pin(s) No. Description
LED0/PAD0 O 9 Link LED
LED1/PAD1 O 10 Full Duplex LED
LED2/PAD2 O 12 Link 10/ACT LED
LED3/PAD3 O 13 Link 100/ACT LED
LED4/PAD4 O 15 Collision LED
5.7 Reset and Test pins
Symbol Type Pin(s) No. Description
RTT3/CTRL O 27 Currently a test pin, this pin may be utilized for future functions.
RESETB I 42 RESETB: Setting low to reset the chip.
5.8 Power and Ground pins
Symbol Type Pin(s) No. Description
AVDD0 P 32 Analog power: 3.3V power supply for analog circuit; should be well
decoupled
AVDD1 P 36 Analog power: 3.3V power supply for analog circuit; should be well
decoupled
AVDD2 P 48 3.3V power supply for PLL, should be well decoupled and use a bead with
100ohm @ 100MHz to connect to analog power
AGND P 29,35,45 Analog Ground: Should be connected to a larger GND plane
DVDD0 P 8 Digital Power: 3.3V power supply for digital circuit.
DVDD1 P 14 Digital Power: 3.3V power supply for digital circuit.
DGND P 11,17 Digital Ground: Should be connected to a larger GND plane
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