HBLXT9785HC.A4 Intel, HBLXT9785HC.A4 Datasheet - Page 44

• Manufacturer Part Number: HBLXT9785HC.A4
• Manufacturer: Intel

Specifications of HBLXT9785HC.A4

• Lead Free Status / RoHS Status: Not Compliant

44
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
Table 13. Miscellaneous Signal Descriptions – PQFP (Sheet 3 of 4)
1. Type Column Coding: I = Input, O = Output, OD = Open Drain Output, ST = Schmitt Triggered Input, TS =
2. The IP/ID resistors are disabled during hardware power-down mode.
3. The LINKHOLD ability is available only for stepping 4 (Revision D0).
PQFP
173
83
59
85
86
87
Three-State-able Output, SL = Slew-rate Limited Output, IP = Weak Internal Pull-Up, ID = Weak Internal
Pull-Down.
Designation
Pin/Ball
PBGA
M14
L2,
L3,
M1
K1
D2
G_FX/TP_L
AMDIX_EN
Symbol
CFG_3
CFG_2
CFG_1
MDIX
I, ID, ST
I, ST, IP
I, ST, ID
I, ST, ID
Type
1
Signal Description
Auto MDIX Enable Default.
This pin is read at startup or reset. Its value at that time
is used to set the default state of Register bit 27.9 for
all ports. These register bits can be read and
overwritten after startup / reset. Refer to
page
When active (High), automatic MDI crossover (MDIX)
(regardless of segmentation) is selected for all ports.
When inactive (Low) MDIX is selected according to the
MDIX pin.
MDIX Select Default.
This pin is read at startup or reset. Its value at that time
is used to set the default state of Register bit 27.8 for
all ports. These register bits can be read and
overwritten after startup / reset. Refer to
“MDIX Selection” on page
When AMDIX_EN is active this pin is ignored.
When AMDIX_EN is inactive, all ports are forced to the
MDI or the MDIX function regardless of segmentation.
If this pin is active (high), MDI crossover (MDIX) is
selected. If this pin is inactive, non-crossover MDI
mode is set.
This pin is shared with RMII-RxER0. An external pull-
up resistor (see applications section for value) can be
used to set MDIX active while RxER0 is three-stated
during H/W reset. If no pull-up is used, the default
MDIX state is set inactive via the internal pull-down
resistor. Do not tie this pin directly to VCCIO (vs. using
a pull-up) in non-RMII modes.
Global Port Configuration Defaults 1-3.
These pins are read at startup or reset. Their value at
that time is used to set the default state of register bits
shown in
Settings” on page 128
can be read and overwritten after startup / reset.
When operating in Hardware Control Mode, these pins
provide configuration control options for all the ports
(refer to
Global FX/TP_L Enable Default.
This pin is read at startup or reset. Its value at that time
is used to set the default state of Register bit 16.0 for
all ports. These register bits can be read and
overwritten after startup / reset. Refer to
Configuration Register (Address 16, Hex 10)” on page
This input selects whether all the ports are defaulted to
TP vs. FX mode.
118.
page 128
Table 42, “Global Hardware Configuration
for details).
2
for all ports. These register bits
118.
Revision Date: 30-May-2006
Document Number: 249241
Revision Number: 010
Table 92, “Port
Table 40 on
Table 40,
Datasheet
207.