DP83256VF-AP NSC [National Semiconductor], DP83256VF-AP Datasheet - Page 50
DP83256VF-AP
Manufacturer Part Number
DP83256VF-AP
Description
Manufacturer
NSC [National Semiconductor]
Datasheet
1.DP83256VF-AP.pdf
(144 pages)
- Current page: 50 of 144
- Download datasheet (988Kb)
D0-D7
5 0 Registers
5 6 INJECTION THRESHOLD REGISTER (IJTR)
The Injection Threshold Register in conjunction with the Injection Control bits (IC
(CTSR) set the frequency at which the contents of the Injection Symbol Register A (ISRA) and Injection Symbol Register B
(ISRB) are inserted into the data stream It contains the start value for the Injection Counter
The Injection Threshold Register value is loaded into the Injection Counter when the counter reaches zero or during every
Control Bus Interface write-cycle of this register
The Injection Counter is an 8-bit down-counter which decrements every 80 ns It’s current value is read for CIJCR
The counter is active only during One Shot or Periodic Injection Modes (i e Injection Control
Current Transmit State Register (CTSR) are set to either 01 or 10) The Transmitter Block will replace a data symbol pair with
ISRA and ISRB when the counter reaches 0 and the Injection Mode is either One Shot or Periodic
If the Injection Threshold Register is set to 0 during the One Shot mode the JK will be replaced with ISRA and ISRB If the
Injection Threshold Register is set to 0 during the Periodic mode all data symbols are replaced with ISRA and ISRB
The counter is initialized to 0 during the reset process (i e E RST
For further information see the INJECTION CONTROL LOGIC section
ACCESS RULES
Bit
IJT7
D7
ADDRESS
IJT0 –IJT7
Symbol
05h
IJT6
D6
INJECTION THRESHOLD BIT
IJT0 is the Least Significant Bit (LSB)
(Continued)
Always
READ
IJT5
D5
IJT4
D4
WRITE
Always
k
0-7
l
IJT3
D3
Start value for the Injection Counter
50
e
Description
GND)
IJT2
D2
k
1 0
IJT1
l
D1
) in the Current Transmit State Register
k
1 0
IJT0
D0
l
bits (IC
k
1 0
l
) of the
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: