Ethernet Subsystem Registers
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14.5.2.3 TX_TEARDOWN Register (offset = 8h) [reset = 0h]
TX_TEARDOWN is shown in Figure 14-31 and described in Table 14-42.
CPDMA_REGS TX TEARDOWN REGISTER
Figure 14-31. TX_TEARDOWN Register
31 30 29 28 27 26 25 24
TX_TDN_RDY Reserved
R-0h R-0h
23 22 21 20 19 18 17 16
Reserved
R-0h
15 14 13 12 11 10 9 8
Reserved
R-0h
7 6 5 4 3 2 1 0
Reserved TX_TDN_CH
R-0h R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 14-42. TX_TEARDOWN Register Field Descriptions
Bit Field Type Reset Description
31 TX_TDN_RDY R 0h Tx Teardown Ready - read as zero, but is always assumed to be
one (unused).
30-3 Reserved R 0h
2-0 TX_TDN_CH R/W 0h Tx Teardown Channel - Transmit channel teardown is commanded
by writing the encoded value of the transmit channel to be torn
down.
The teardown register is read as zero.
000 - teardown transmit channel 0 ...
111 - teardown transmit channel 7
1260
Ethernet Subsystem SPRUH73H–October 2011–Revised April 2013
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