
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
114
Datasheet 
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003
N8,
P8
LED1_1
LED1_2
OD, TS, 
SL, IP
Port 1 LED Drivers 1-2.
These pins drive LED indicators for Port 1. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
P7,
N7,
LED2_1
LED2_2
OD, TS, 
SL, IP
Port 2 LED Drivers 1-2.
These pins drive LED indicators for Port 2. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
P6,
N6
LED3_1
LED3_2
OD, TS, 
SL, IP
Port 3 LED Drivers 1-2.
These pins drive LED indicators for Port 3. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
B9,
A9
LED4_1
LED4_2
OD, TS, 
SL, IP
Port 4 LED Drivers 1-2.
These pins drive LED indicators for Port 4. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
B8,
A8
LED5_1
LED5_2
OD, TS, 
SL, IP
Port 5 LED Drivers 1-2.
These pins drive LED indicators for Port 5. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
A7,
B7
LED6_1
LED6_2
OD, TS, 
SL, IP
Port 6 LED Drivers 1-2.
These pins drive LED indicators for Port 6. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details). 
B6,
A6
LED7_1
LED7_2
OD, TS, 
SL, IP
Port 7 LED Drivers 1-2.
These pins drive LED indicators for Port 7. Each LED can 
display one of several available status conditions as 
selected by the LED Configuration Register (refer to 
Table 96, “LED Configuration Register (Address 20, Hex 
14)” on page 213
 for details).
Power Supply Signal Descriptions
D12, E12, 
F12, G12, 
H12, J12, 
K12, L12, 
AVCC
–
Analog Power Supply.
+2.5 V supply for analog circuits.
Table 39. Intel
 LXT9785 BGA15 Signal Descriptions  (Sheet 6 of 7)
BGA15 Ball 
Designation
Symbol
Type
Signal Description
1. Type Column Coding: I = Input, O = Output, OD = Open Drain output, ST = Schmitt Triggered input, TS = 
Three-State-able output, SL = Slew-rate Limited output, IP = weak Internal Pull-up, ID = weak Internal pull-
Down.