Datasheet

508
32117D–AVR-01/12
AT32UC3C
24.7.1 Network Control Register
Name: NCR
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• TZQ: Transmit Zero Quantum Pause Frame
Writing a one to this bit sends a pause frame with zero pause quantum at the next available transmitter idle time.
• TPF: Transmit Pause Frame
Writing a one to this bit sends a pause frame with the pause quantum from the transmit pause quantum register at the next
available transmitter idle time.
• THALT: Transmit Halt
Writing a one to this bit halts transmission as soon as any ongoing frame transmission ends.
• TSTART: Start Transmission
Writing a one to this bit starts transmission.
• BP: Back Pressure
0: No collision are forced.
1: In half duplex mode, forces collisions on all received frames.
• WESTAT: Write Enable for Statistics Registers
0: Statistics registers are read-only.
1: Statistics registers are writable for functional test purposes.
• INCSTAT: Increment Statistics Registers
Writing a one increments all the statistics registers by one for test purposes.
• CLRSTAT: Clear ¨Statistics Registers
Writing a one clears the statistics registers.
• MPE: Management Port Enable
0: Forces MDIO to high impedance state and DPC low.
1: Enables the management port.
• TE: Transmit Enable
0: Transmission stops immediately, the transmit FIFO and control registers are cleared and the transmit queue pointer register
resets to point to the start of the transmit descriptor list.
1: Enables the Ethernet transmitter to send data.
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
- - - TZQ TPF THALT TSTART BP
76543210
WESTAT INCSTAT CLRSTAT MPE TE RE LLB LB