RM0082
HS_Media independent interface (MII)
Doc ID 018672 Rev 1
529/844
suspended. This bit is set only when the previous descriptor in Receive list is owned by
DMA.
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RI
If set it indicates the completion of frame reception. Note that Receive Process remains
in running state.
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UNF
If set it indicates that the Transmit Buffer had an underflow during frame transmission.
Transmission is then suspended and an underflow error is set in TDES0.
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OVF
If set it indicates that the Receive Buffer had an overflow during frame reception. If the
partial frame is transferred to application, the overflow status is set in RDES0.
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TJT
If set it indicates that the transmit jabber timeout expired, meaning that the transmitter
had been excessively active. Transmission is then aborted and placed in Stopped state,
causing the bit [14] in TDES0 to be set.
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TU
If set it indicates that the Next Descriptor in the Transmit list is owned by the host and it
can't be acquired by DMA (transmit buffer unavailable), resulting in Transmit Process
suspended.
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TPS
This bit is set when the Transmit Process enters in the Stopped state (refer to TS field
in this register).
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TI
If set it indicates the completion of frame transmission, and bit [31] in TDES1 is set for
the first descriptor.
24.7.9
Operation mode register (Register 6, DMA)
The Operation Mode is a register which establishes the transmit and receive operating
modes and commands. The Operation Mode bit assignments are given in
.
Note:
The operation mode register should be the last CSR to be written as part of DMA
initialization.