DP83256VF-AP NSC [National Semiconductor], DP83256VF-AP Datasheet - Page 46
DP83256VF-AP
Manufacturer Part Number
DP83256VF-AP
Description
Manufacturer
NSC [National Semiconductor]
Datasheet
1.DP83256VF-AP.pdf
(144 pages)
- Current page: 46 of 144
- Download datasheet (988Kb)
Bit
D3
D4
D5
D6
D7
5 0 Registers
Symbol
CWI
LEMT
RCA
RCB
UDI
CONDITIONAL WRITE INHIBIT Set to 1 when bits within mentioned registers do not match bits in the
corresponding compare register This bit ensures that new (i e unread) data is not inadvertently cleared while old
data is being cleared through the Control Bus Interface
This bit is set to 1 to indicate that a bit in a condition write register was not written because it had changed since
the previous read The following registers are affected
Interrupt Condition Register (Register 02 ICR)
Current Transmit State Register (Register 04 CTSR)
Receive Condition Register A (Register 09 RCRA)
Receive Condition Register B (Register 0A RCRB)
CMT Condition Register (Register 20 CMTCR)
The previous registers are affected when they differ from the value of the corresponding bit in the following
registers respectively
Interrupt Condition Compare Register (Register 1A ICCR)
Current Transmit State Compare Register (Register 1B CTSCR)
Receive Condition Compare Register A (Register 1C RCCRA)
Receive Condition Compare Register B (Register 1D RCCRB)
CMT Condition Compare Register (Register 1F CMTCCR)
This bit must be cleared by software Note that this differs from the MACSI BMAC and BSI device bits of the same
name
The Configuration Register (Register 01 CR) can not be written to during scrubbing
LINK ERROR MONITOR THRESHOLD This bit is set to 1 when the internal 8-bit Link Error Monitor Counter
reaches zero It will remain set and is cleared by software
During the reset process (i e E RST
Error Monitor Counter is initialized to zero
RECEIVE CONDITION A This bit is set to 1 when
1 One or more bits in the Receive Condition Register A (RCRA) is set to 1 and
2 The corresponding mask bits in the Receive Condition Mask Register A (RCMRA) are also set to 1
In order to clear (i e set to 0) the Receive Condition A bit the bits within the Receive Condition Register A that are
set to 1 must first be either cleared or masked
RECEIVE CONDITION B This bit is set to 1 when
1 One or more bits in the Receive Condition Register B (RCRB) is set to 1 and
2 The corresponding mask bits in the Receive Condition Mask Register A (RCMRB) are also set to 1
In order to clear (i e set to 0) the Receive Condition B bit the bits within the Receive Condition Register B that are
set to 1 must first be either cleared or masked
USER DEFINABLE INTERRUPT This bit is set to 1 when one or any combination of the Sense Bits (SB0 SB1 or
SB2) in the User Definable Register (UDR) are set to 1
In order to clear (i e set to 0) the User Definable Interrupt Bit all Sense Bits must be set to 0
(Continued)
e
GND) the Link Error Monitor Threshold bit is set to 1 because the Link
46
Description
Related parts for DP83256VF-AP
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: