DP83816AVNG/NOPB National Semiconductor, DP83816AVNG/NOPB Datasheet - Page 85

• Manufacturer Part Number: DP83816AVNG/NOPB
• Description: IC MEDIA ACCESS CTRLR 144-LQFP
• Manufacturer: National Semiconductor

Specifications of DP83816AVNG/NOPB

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 144-LQFP
• Mounting Type: Surface Mount
• For Use With: DP83816-MAAP - BOARD EVALUATION DP83816
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *DP83816AVNG; *DP83816AVNG/NOPB; DP83816AVNG

5.0 Buffer Management
rxDescRead
rxFIFOblock
rxDescWrite
rxFragWrite
rxDescRefr
rxAdvance
State
rxIdle
CR:RXE && !CRDD
XferDone && !OWN
CR:RXE && CRDD
XferDone && OWN
(descCnt == 0) &&
(rxPktBytes > 0)
rxPktBytes == 0
link == NULL
link!= NULL
FifoReady
XferDone
XferDone
XferDone
Event
(Continued)
Table 5-6 Receive State Tables
rxDescRead
rxFIFOblock
rxDescWrite
rxDescWrite
rxFIFOblock
rxDescRead
rxFragWrite
Next State
rxDescRefr
rxAdvance
rxAdvance
rxIdle
rxIdle
85
Start a burst transfer at address RXDP and a length
derived from RXCFG.
Start a burst transfer to refresh the link field of the current
descriptor.
Set ISR:RXIDLE.
Start a burst transfer from the RxDataFIFO to host
memory at fragPtr. The length will be the minimum of
rxPktBytes and descCnt. Decrement descCnt
accordingly.
Start a burst transfer to write the status back to the
descriptor, setting the OWN bit, and setting the MORE
bit. We'll continue the packet in the next descriptor.
Start a transfer to write the cmdsts back to the descriptor,
setting the OWN bit and clearing the MORE bit, and
filling in the final receive status (CRC, FAE, SIZE, etc.).
RXDP <- rxDescCache.link. Clear CRDD. Start a burst
transfer at address RXDP with a length derived from
RXCFG:MXDMA.
Set CRDD. Set ISR:RXIDLE.
Actions
www.national.com