3X38FTR Datasheet, PDF (20/64 Pages) Agere Systems – OCTAL-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Preliminary Data Sheet
September 2000
Pin Descriptions (continued)
Table 6. LED and Configuration Pins (continued)
Pin
Signal
Type
Description
6
ACTLED_1/
BIACTLED_1/
BLINK_LED_MODE
7
ACTLED_0/
BIACTLED_0/
STRETCH_LED
207,
ACTLED_[7:6]/
208
BIACTLED[7:6]
206
SPEEDLED_0/
PHY_ADD[0]
O Activity LED[1]. This pin indicates transmit or receive activity on port 1.
10 mA active-high output.
O Bicolor Activity LED[1]. When the 3X38 is placed in the bicolor LED
mode by pulling both of the LED_MODE[1:0] pins high at powerup or
reset, this output will go high whenever there is either transmit or
receive activity. This output works in conjunction with the link LED out-
puts to drive a single bicolor LED package, when in bicolor LED mode.
10 mA active-high output.
I Blink LED Mode. At powerup or reset, when pulled high through a
10 kΩ resistor (and the STRETCH_LED pin is low), the activity LED
output will blink high for 40 ms and low for 40 ms whenever there is
activity. This signal is ORed with register 29, bit 11. This pin has an
internal 50 kΩ pull-down resistor; default is blink mode disabled.
O Activity LED[0]. This pin indicates transmit or receive activity on port 0.
10 mA active-high output.
O Bicolor Activity LED[0]. When the 3X38 is placed in the bicolor LED
mode by pulling both of the LED_MODE[1:0] pins high at powerup or
reset, this output will go high whenever there is either transmit or
receive activity. This output works in conjunction with the link LED out-
puts to drive a single bicolor LED package, when in bicolor LED mode.
10 mA active-high output.
I Stretch LED Mode. At powerup or reset, when pulled high through a
10 kΩ resistor, this pin enables stretching. When high, the activity LED
output is stretched to 42 ms minimum and 84 ms maximum, unless
BLINK_LED_MODE is high, in which case it blinks 40 ms high and
40 ms low. This pin is ORed with register 29, bit 7. This pin has an inter-
nal 50 kΩ pull-up resistor. Default is stretch LED mode enabled.
O Activity LED[7:6]. This pin indicates transmit or receive activity on port
7 or 6. 10 mA active-high output.
O Bicolor Activity LED[7:6]. When the 3X38 is placed in the bicolor LED
mode by pulling both of the LED_MODE[1:0] pins high at powerup or
reset, this output will go high whenever there is either transmit or
receive activity. This output works in conjunction with the link LED out-
puts to drive a single bicolor LED package, when in bicolor LED mode.
10 mA active-high output.
O Speed LED[0]. This pin indicates the operating speed of port 0 on the
3X38. A high on this pin indicates 100 Mbits/s operation. A low indicates
10 Mbits/s operation. 10 mA active-high output.
I PHY Address 0. At powerup or reset, this pin may be used to set the
PHY address bit 0.
At powerup or reset, if this pin is pulled high through a 10 kΩ resistor, it
will set PHYADD[0] to a 1. If this pin is pulled low through a 10 kΩ resis-
tor, it will set PHYADD[0] to a 0. This pin has an internal 50 kΩ pull-
down resistor.
20
Lucent Technologies Inc.