NHIXP430AC Intel, NHIXP430AC Datasheet - Page 15

• Manufacturer Part Number: NHIXP430AC
• Manufacturer: Intel

Specifications of NHIXP430AC

• Core Operating Frequency: 400MHz
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

4.0 Non-Intel XScale
Status:
16.
Problem:
Implication:
Workaround:
Status:
17.
Problem:
Implication:
Workaround:
Status:
18.
Problem:
Implication:
Workaround:
Status:
19.
Problem:
Implication:
Workaround:
December 2008
Order Number: 316847; Revision:
No Fix.
Ethernet MAC Does Not Detect Transmit FIFO Under-runs Reliably
There is a transmit race condition in the 10/100 Ethernet MAC. The race condition
happens when the 10/100 Ethernet MACs transmit FIFO is filled on the same transmit
clock as the transmit FIFO under-run occurs on the line side. If the race condition were
to happen, the 10/100 MAC may end up appending four more bytes of indeterminate
data to the Ethernet frame that is transmitted on the line. The FCS will be generated on
the frame that includes the four extra bytes so the receiver will not detect any problem
with the Frame.
Currently no customers have experienced this problem or a problem with similar
symptoms with years of testing and millions of units productized and deployed.
This problem can potentially occur in situations of intense NPE load (VLAN/QoS, fire
wall, header conversion) resulting in the transmission of corrupt frames. This problem
is detectable in applications that run any upper-layer protocol. For example, Layer 3/4
in the network application stack will detect this problem (because of IP checksum error)
and drop the packet before it reaches the application. This error is undetectable by the
receiver.
None.
No Fix.
Expansion Bus Bootup Failure
EX_DATA is switching between input and output during bootup sequence. As the output
buffer is always enabled, the bootup code cannot be driven into the Intel XScale
processor successfully.
After reset, the Intel
transaction through Expansion Bus. The IXP43X product line of network processors
continues to drive the EX_DATA[15:0] even when EX_RD_N is asserted. This causes a
bus contention with the target device on the Expansion Bus. The IXP43X product line of
network processors also drives the EX_DATA[15:0] with values from EX_ADDR[15:0]
appearing as if it is attempting to perform a multiplexed mode read transaction.
However, the EX_ALE were not asserted, and it does not release the EX_DATA for the
target device.
None.
Fixed.
Incorrect Reset Value of GPIO_INR[0] and GPIO_ISR[0]
GPIO[0] has a weak pull-up to 3.3V, if the GPIO0 is configured as input. The weak
pull-up will appear internally and propagate all the way to the interrupt status register,
INTR_ST. It will interrupt only the Intel XScale processor via either IRQ or FIQ
(INTR_EN bit 6) that corresponds to the enabled GPIO0.
The value of the GPIO_INR[15:0] and GPIO_ISR[15:0] should be zero when configured
as input; though the value read back from the Intel
Processors does not indicate all zero. The read back value of the GPIO_INR[15:1] and
GPIO_ISR[15:1] are zeros, while the GPIO_INR[0] and GPIO_ISR[0] are ones.
None.
Fixed.
USB Under-run errors when both USB ports perform Interrupt OUT
transfers.
Under-run errors are noticed on USB ports when both the ports are performing
Interrupt OUT transfers. Single port will not report any error. The under-run error
notifies that the host is ready to transmit, but the data is not available in transmit
buffer.
Interrupt OUT transfer is not supported on both the USB ports simultaneously.
Do not perform Interrupt OUT transfer on both ports simultaneously. Use single port
instead. The Interrupt OUT pipe is optional. If no Interrupt OUT endpoint is declared
®
Technology Errata Descriptions
005US
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IXP43X Product Line of Network Processors performs read
Intel
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®
IXP43X Product Line of Network Processors
IXP43X Product Line of Network
Specification Update
15