DP83950BNU NSC [National Semiconductor], DP83950BNU Datasheet - Page 38
DP83950BNU
Manufacturer Part Number
DP83950BNU
Description
Manufacturer
NSC [National Semiconductor]
Datasheet
1.DP83950BNU.pdf
(80 pages)
- Current page: 38 of 80
- Download datasheet (946Kb)
Name
RA0
RA1
RA2
RA3
RA4
5 0 Functional Description
Pin
Programming
Function
BYPAS1
BYPAS2
EXPLL
BINV
resv
TABLE 5 1 Pin Definitions for Options in the Mode Load Operation (Continued)
Not Permitted
Effect When
External PLL
Active High
Bit is 0
Signals
Effect When
Internal PLL
Active Low
Required
(Continued)
Signals
Bit is 1
38
These configuration bits select which of the repeater ports
(numbers 2 to 13) are configured to use the on-chip internal
10BASE-T transceivers or the external transceiver interface The
external transceiver interface operates using AUI compatible
signal levels
BYPAS2
This selection determines whether the Inter-RIC signals IRE
ACTN ANYXN COLN and Management bus signal MCRS are
active high or low
If desired the RIC may be used with an external decoder this
configuration bit performs the selection
To ensure correct device operation this bit must be written with
a logic one during the mode load operation
0
0
1
1
BYPAS1
0
1
0
1
All ports (2 to 13) use the external
Transceiver Interface
Ports 2 to 7 use the external
interface 8 to 13 use the internal
10BASE-T transceivers
Ports 2 to 5 use the external
interface 6 to 13 use the internal
10BASE-T transceivers
All ports (2 to 13) use the internal
10BASE-T transceivers
Function
Information
Related parts for DP83950BNU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Thin SOT23 1A Load Step-Down DC-DC Regulator
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
TRI-STATE Dual Receiver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Hex MOS Drivers
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Quad High Current Peripheral Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
(RS-422/RS-423) Line Drivers with TRI-STATE Outputs
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Multipoint RS485/RS422 Transceivers/Repeaters
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Low Power EIA-RS-485 Transceiver with Sleep Mode
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
BTL Handshake Transceiver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Octal 80-Bit Static Shift Register
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
PUSH BUTTON PULSE DIALER CIRCUITS
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Hex Schmitt Trigger with Extended Input Voltage
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Microprocessor Real Time Clock
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Dual Line Receivers
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Dual TRI-STATE Differential Line Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet: