DP83815DUJB/NOPB National Semiconductor, DP83815DUJB/NOPB Datasheet - Page 84

IC MEDIA ACCESS CONTROL 160-LBGA

DP83815DUJB/NOPB

Manufacturer Part Number
DP83815DUJB/NOPB
Description
IC MEDIA ACCESS CONTROL 160-LBGA
Manufacturer
National Semiconductor
Datasheet

Specifications of DP83815DUJB/NOPB

Controller Type
Ethernet Controller, MAC/BIU
Interface
PCI
Voltage - Supply
3.3V
Current - Supply
170mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
160-LBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*DP83815DUJB
*DP83815DUJB/NOPB
DP83815DUJB

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DP83815DUJB/NOPB
Manufacturer:
Texas Instruments
Quantity:
10 000
5.0 Buffer Management
txDescRead
txFIFOblock
txDescWrite
txFragRead
txDescRefr
txAdvance
State
txIdle
txDescRefr
XferDone
XferDone
txAdvance
XferDone && !OWN
CR:TXE && !CTDD
XferDone && OWN
CR:TXE && CTDD
(descCnt == 0) &&
(descCnt == 0) &&
link == NULL
link != NULL
XferDone
XferDone
XferDone
FifoAvail
!MORE
MORE
Event
link = NULL
(Continued)
txDescWrite
CR:TXE && CTDD
Figure 5-5 Transmit State Diagram
Table 5-5 Transmit State Tables
descCnt == 0 && (cmdsts & MORE)
txDescRead
txDescRead
txFIFOblock
txDescWrite
txFIFOblock
txFragRead
Next State
txDescRefr
descCnt == 0 && !(cmdsts & MORE)
txAdvance
txAdvance
txAdvance
link != NULL
txIdle
txIdle
txIdle
84
Start a burst transfer at address TXDP and a length
derived from TXCFG.
Start a burst transfer to refresh the link field of the current
descriptor.
Set ISR:TXIDLE.
Start a burst transfer into the TxDataFIFO from fragPtr.
The length will be the minimum of txFifoAvail and
descCnt.
Decrement descCnt accordingly.
Start a burst transfer to write the status back to the
descriptor, clearing the OWN bit.
Write the value of TXDP to the txDataFIFO as a handle.
TXDP <- txDescCache.link. Clear CTDD. Start a burst
transfer at address TXDP with a length derived from
TXCFG.
Set CTDD. Set ISR:TXIDLE. Clear CR:TXE.
txFifoBlock
XferDone && !OWN
txDescRead
CR:TXE && !CTDD
Actions
XferDone && OWN
FifoAvail
XferDone
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txFragRead

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