3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Preliminary Data Sheet
September 2000
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Features
(continued)
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Single 50 MHz/125 MHz clock input in RMII and SMII
modes, respectively.
Supports half- and full-duplex operations.
Provides four LED status signals:
— Activity (transmit or receive). Optional LED blink
mode (500 ms on, 500 ms off or 2.5 s on, 2.5 s
off) or pulse stretch mode (40 ms—80 ms).
— Full duplex or collision, automatically configured.
— Link integrity.
— Speed indication.
Internally generated power-on-reset configures 3X38
automatically on powerup.
Serial LED output stream for additional status moni-
toring.
Bicolor LED mode.
LED drivers on-chip (8 mA—10 mA). Drivers can be
turned off when LED is not used (power saving).
Per-channel powerdown mode for 10 Mbits/s and
100 Mbits/s operation.
Loopback for 10 Mbits/s and 100 Mbits/s operation.
Internal pull-up or pull-down resistors to set default
configuration during powerup.
0.25
µm
low-power CMOS technology.
208-pin SQFP package.
JTAG boundary scan.
Single 3.3 V power supply.
Fiber mode automatically configures port:
— Disables autonegotiation.
— Disables 10Base-T.
— Enables 100Base-FX far-end fault signaling.
— Disables MLT-3 encoder/decoder.
— Disables scrambler/descrambler.
FX mode enable is pin- or register-selectable on an
individual per-port basis.
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General
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Low power dissipation (<0.4 W per port).
Autonegotiation (IEEE 802.3u, clause 28):
— Fast link pulse (FLP) burst generator.
— Arbitration function.
Supports the station management protocol and
frame format (clause 22):
— Basic and extended registers.
— Supports next page mode.
— Accepts preamble suppression.
— Maskable status interrupts.
— 12.5 MHz MDC clock rate.
Supports the following management functions via
pins if MII station management is unavailable:
— Speed select.
— Scrambler/descrambler bypass.
— Full duplex.
— No link pulse mode.
— Carrier sense select.
— Autonegotiation.
— FX mode select.
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Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
