SLXT914QC.B3 Intel, SLXT914QC.B3 Datasheet - Page 22

• Manufacturer Part Number: SLXT914QC.B3
• Description: IC QUAD ETHERNET REPEATER 100QFP
• Manufacturer: Intel
• Type: Repeaterr

Specifications of SLXT914QC.B3

• Rohs Status: RoHS non-compliant
• Tx/rx Type: Ethernet
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 180mA
• Mounting Type: Surface Mount
• Package / Case: 100-QFP
• Delay Time: -
• Capacitance - Input: -
• Other names: 831521

Intel
2.6
2.6.1
2.6.2
2.6.3
31-Oct-2005
22
®
Table 13. AUI Mode Selection (DTE/MAU)
LXT914 Flexible Quad Ethernet Repeater
AUI Port Operation
AUI Reception
The LXT914 Repeater AUI port receiver acquires data packets from the network (AUIDIP/
AUIDIN). Only valid data streams above the squelch level activate the receive function. If the
differential signal at the DI circuit inputs falls below 75% of the threshold level (unsquelched) for 8
bit times (typical), the AUI receiver enters the idle state.
AUI Transmission
The LXT914 Repeater AUI port receives NRZ data from the repeater core, and passes it through a
Manchester encoder. The encoded data then goes out on the network (AUIDOP/AUIDON).
AUI Mode Selection (DTE/MAU)
The LXT914 Repeater allows the user to change the mode of the AUI from a DTE to a MAU
interface. This option is available on both 68- and 100-pin versions except as follows:
Note:
•
•
App #
When using the LEDJM/AUISEL pin to select the AUI interface mode the following is true:
After reset the state of the LEDJM/AUISEL pin is sensed for the correct mode. The LEDJM/
AUISEL pin when floated or pulled Low will select the DTE interface and the LEDJM/
AUISEL output is still available. When the LEDJM/AUISEL pin is pulled High the MAU
interface is selected and the LEDJM/AUISEL function is unavailable.
The 100-pin PQFP has an additional pin, AUISEL (pin 30). When using this pin to select the
AUI interface mode the LEDJM/AUISEL pin is still a functional LED driver. The AUISEL
pin is not latched after reset and is actively polled to determine which AUI interface mode is to
be used. Refer to
1
2
3
4
Application 3 is valid only when using the 100-pin PQFP.
(PQFP only
AUISEL
High
High
Low
Low
Intel
Table
®
Order Number: 248989, Revision: 003
LXT914 Flexible Quad Ethernet Repeater
)
13.
(both pkgs)
LEDJM/
AUISEL
High
High
Low
Low
AUI Mode
MAU
MAU
MAU
DTE
default, 0-3
1-3
default, 0-3
1-3
Available
Modes
LED
Datasheet