
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
Datasheet
47
Document Number: 249241
Revision Number: 010
Revision Date: 30-May-2006
185
186
187
J15,
J16,
H17
LED5_1_L
LED5_2_L
LED5_3_L
OD, TS, SL,
IP
Port 5 LED Drivers 1-3.
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
189
190
191
H15,
H16,
G17
LED6_1_L
LED6_2_L
LED6_3_L
OD, TS, SL,
IP
Port 6 LED Drivers 1-3.
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
192
193
194
G15,
F17,
F16
LED7_1_L
LED7_2_L
LED7_3_L
OD, TS, SL,
IP
Port 7 LED Drivers 1-3.
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
Table 15. Power Supply Signal Descriptions – PQFP (Sheet 1 of 2)
Pin/Ball Designation
Symbol
Type
Signal Description
PQFP
PBGA
65, 78, 184,
196
G13, J14,
F5, J5
VCCD
-
Digital Power Supply - Core.
+2.5 V supply for core digital circuits.
18, 29, 47,
56, 208
A2, A8,
C1, C11,
D14
VCCIO
-
Digital Power Supply - I/O Ring.
+2.5/3.3 V supply for digital I/O circuits. The digital
input circuits running off of this rail, having a TTL-level
threshold and over-voltage protection, may be
interfaced with 3.3/5.0 V, when the IO supply is 3.3 V,
and 2.5/3.3/5.0 V when 2.5 V.
98, 164
L13, L5
VCCPECL
-
Digital Power Supply - PECL Signal Detect Inputs.
+2.5/3.3 V supply for PECL Signal Detect input
circuits. If Fiber Mode is not used (that is, G_FX/TP_L
is pulled Low), the VCCPECL pins may be tied to
GNDPECL to save power.
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.
Table 14. LED Signal Descriptions – PQFP (Sheet 2 of 2)
Pin/Ball
Designation
Symbol
Type1
Signal Description2,3
PQFP
PBGA
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.
2. The IP/ID resistors are disabled during H/W Power-Down mode. If a pin is an output or an I/O, the IP/ID
resistors are also disabled when the output is enabled.
3. The LED outputs are three-stated in H/W Power-Down mode and during H/W reset.