FLLXT1000BA.C4QE000 Intel, FLLXT1000BA.C4QE000 Datasheet - Page 36

• Manufacturer Part Number: FLLXT1000BA.C4QE000
• Manufacturer: Intel

Specifications of FLLXT1000BA.C4QE000

• Lead Free Status / RoHS Status: Not Compliant

LXT1000 — Gigabit Ethernet Transceiver
2.3.9.3
2.3.9.4
36
LEDL
LEDT
LEDR
LEDF
LEDC
LEDG
LEDS
Table 16. LED Status Indication / PHY Addressing
LED Ball
Figure 15. PHY Address Determination via LED balls
LED Ball
LED Ball
I = 10 mA
R
R
1
2
= 180W
= 100 k
LED Options
Individual LEDs can be set to turn on solid, turn off, or blink. If enabled, the blink period is 512
ms. LED events can be “activity stretched” to 100 ms (from the default 30 ms) by setting bit
20.0 = 1. Pulse stretching also can be disabled, if desired, by setting bit 20.1 = 1. This may be
useful to indicate events for a management engine. In addition, turning LEDs on and off via MDIO
management control may be useful for diagnostic purposes.
PHY Address Determination
Five of the seven LED balls (LEDR, LEDT, LEDL, LEDF, and LEDC) also determine the PHY
address. At power-up and reset, these five LED balls define the GMII PHY address of the
LXT1000. After power-up and reset, the same balls become LED status indicators (see
The configuration of the LED components depends on the actual value used for the individual PHY
address bits. Refer to
between the LED ball VCC. When a “0” value is desired, the LED and resistor are connected
between the LED ball and ground. The polarity of the LEDs is automatically detected and
corrected.
If LEDs are not required for the application, only a resistor is required to set the PHY address.
The LED balls are designed to drive 10 mA. They will be open drain/source depending on the
external circuit configuration. This will allow the user to tie several configuration balls together
(with a single resistor) if LEDs are not desired, assuming that all ports will be set to the same value.
Link LED. Link status.
Transmit LED. Transmitting packets.
Receive LED. Receiving packets.
Duplex LED. Full-duplex mode selection.
Collision LED. Collision indication.
Gigabit LED. 1000 operation selection.
Speed LED. 10/100 operation selection.
R
R
1
1
LED Function
Figure
R
2
15. When a “1” value is desired, the LED and resistor are connected
PHY Address Bit = 0
PHY Address Bit = 1
NOTE: The LEDs auto-detect and correct their polarity
based on the configuration value.
PHY Address bit 0
PHY Address bit 1
PHY Address bit 2
PHY Address bit 3
PHY Address bit 4
None. Tie Low
None. Tie Low
Initialization
Function
Off
Channel A DSP Lock
Channel B DSP Lock
Channel D DSP Lock
No Function
No Function
Channel C DSP Lock
Link Down Function
Document #: 249276
Rev. Date: 07/20/01
Revision #: 002
Datasheet
Table
16).