lxt971a Intel Corporation, lxt971a Datasheet - Page 30
![no-image](/images/manufacturer_photos/0/3/337/intel_corporation_sml.jpg)
lxt971a
Manufacturer Part Number
lxt971a
Description
3.3v Dual-speed Fast Ethernet Phy Transceiver
Manufacturer
Intel Corporation
Datasheet
1.LXT971A.pdf
(90 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
lxt971a1CA4
Manufacturer:
INTERSIL
Quantity:
20 000
Company:
Part Number:
lxt971a8EA4
Manufacturer:
Intel
Quantity:
28
Company:
Part Number:
lxt971aBC
Manufacturer:
CORTINA
Quantity:
41
Company:
Part Number:
lxt971aBE
Manufacturer:
INTEL
Quantity:
10
Company:
Part Number:
lxt971aLC
Manufacturer:
CORTINA
Quantity:
4 143
Company:
Part Number:
lxt971aLC
Manufacturer:
INTEL
Quantity:
399
Part Number:
lxt971aLC
Manufacturer:
INTEL
Quantity:
20 000
Part Number:
lxt971aLC A4
Manufacturer:
LEVELONE
Quantity:
20 000
Part Number:
lxt971aLC.A4
Manufacturer:
INTEL
Quantity:
20 000
Part Number:
lxt971aLCAC
Manufacturer:
INTEL
Quantity:
20 000
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
3.4.5
30
Figure 8. Hardware Configuration Settings
Table 9.
Hardware Configuration Settings
The LXT971A provides a hardware option to set the initial device configuration. The hardware
option uses the three LED driver pins. This provides three control bits, as listed in
LED drivers can operate as either open-drain or open-source circuits as shown in
Hardware Configuration Settings
Disabled
Enabled
1. Refer to
Auto-
Neg
Desired Mode
(Mbps)
10/100
Speed
Table 7 on page 19
Only
100
100
10
Duplex
Full or
Only
Half
Half
Half
Half
Half
Full
Full
Full
LED/CFG Pin
1. The LED/CFG pins automatically adjust their
2. Unused LEDs may be implemented with pull-up/
LED/CFG Pin
polarity upon power-up or reset.
pull-down resistors of 10 K.
High
High
High
High
Low
Low
Low
Low
for LED/CFG pin assignments.
1
Pin Settings
LED/CFGn
High
High
High
High
Low
Low
Low
Low
2
Configuration Bit = 1
Configuration Bit = 0
High
High
High
High
Low
Low
Low
Low
1
3
Auto-
Neg
0.12
0
1
Control Register
Speed
0.13
3.3 V
0
1
1
Resulting Register Bit Values
0.8
FD
0
1
0
1
0
1
0
1
AN Advertisement Registers
100FD
4.8
0
1
0
1
Auto-Negotiation Adver-
Rev. Date: August 7, 2002
100TX
tisement
Figure
4.7
Document #: 249414
1
1
1
1
Table
N/A
Revision #: 002
Datasheet
10FD
9. The
8.
4.6
0
0
0
1
10T
4.5
0
0
1
1