PNX1702EH/G,557 NXP Semiconductors, PNX1702EH/G,557 Datasheet - Page 717
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PNX1702EH/G,557
Manufacturer Part Number
PNX1702EH/G,557
Description
IC MEDIA PROC 500MHZ 456-BGA
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1702EHG557.pdf
(832 pages)
Specifications of PNX1702EH/G,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Ram Size
208K x 8
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.33 V ~ 1.47 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-HBGA
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Lead Free Status / Rohs Status
Compliant
Other names
935281647557
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
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Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
While issuing the descriptor read commands, the Tx(Rt) DMA manager also begins
to write the transmission status. The status write command address will be taken
from the Tx(Rt)Status register; the block size will be 3 statuses * 1 double words = 3 .
After transmitting each fragment of the packet, the Tx(Rt) DMA will write the status of
the fragment’s transmission. Statuses for all but the last fragment in the packet will be
written as soon as the data in the packet has been accepted by the Tx(Rt) DMA
manager. The status for the last fragment in the packet will only be written after the
transmission has completed on the Ethernet connection.
The Tx(Rt) DMA manager checks if status write data has been committed to memory.
Only then are the Tx(Rt)ConsumeIndex updated and the interrupt flags forwarded to
the IntStatus register. The LAN100 tags transmit statuses continuously but does not
necessarily tag every status individually.
Since the Interrupt bit in the descriptor of the last fragment is set, after committing
status of the last fragment to memory, the LAN100 will trigger a Tx(Rt)DoneInt
interrupt which triggers the device driver to inspect the status information.
In this example, the device driver cannot add new descriptors as long as the LAN100
has incremented the Tx(Rt)ConsumeIndex because the descriptor array is full (even
though one descriptor is not programmed yet (see
Only after committing the status for the first fragment to memory and updating the
Tx(Rt)ConsumeIndex to 1 can the device driver program the next (the fourth)
descriptor. The fourth descriptor can be programmed before completely transmitting
the first packet.
In this example the hardware adds the CRC. If the device driver software adds the
CRC, the CRC trailer can be considered another packet fragment which can be
added by doing another gather DMA operation.
Rev. 1 — 17 March 2006
Chapter 23: LAN100 — Ethernet Media Access Controller
Section 5.2.4 on page
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
PNX17xx Series
23-35).
23-44
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