NQ80331M667 S L9B8 Intel, NQ80331M667 S L9B8 Datasheet - Page 46

• Manufacturer Part Number: NQ80331M667 S L9B8
• Manufacturer: Intel

Specifications of NQ80331M667 S L9B8

• Lead Free Status / RoHS Status: Not Compliant

Intel
Core Errata
7.
Problem:
Workaround:
Status:
8.
Problem:
Workaround:
Status:
46
®
80331 I/O Processor
Updating the JTAG parallel registers requires an extra TCK rising edge
The IEEE 1149.1 spec states that the effects of updating all parallel JTAG registers should be seen
on the falling edge of TCK in the Update-DR state. The Intel XScale
incorrectly require an extra TCK rising edge to make the update visible. Therefore, operations like
hold-reset, JTAG break, and vector traps require either an extra TCK cycle by going to
Run-Test-Idle or by cycling through the state machine again in order to trigger the expected
hardware behavior.
When the JTAG interface is polled continuously, this erratum has no effect. When not, an extra
TCK cycle can be caused by going to Run-Test-Idle after writing a parallel JTAG register.
No Fix. See the
Non-branch instruction in vector table may execute twice after a thumb
mode exception
When an exception occurs in thumb mode and a non-branch instruction is executed at the
corresponding exception vector, that instruction may execute twice. Typically instructions located
at exception vectors must be branch instructions which go to the appropriate handler, but the ARM
architecture
(0x0000001c/0xffff001c) without requiring a branch. Because of this bug, the first instruction of
such an FIQ handler may be executed twice when it is not a branch instruction.
When a ‘NOP’ is placed at the beginning of the FIQ handler, the ‘NOP’ executes twice and no
incorrect behavior results. When a branch instruction is placed at the beginning of the handler, it
does not executed twice.
No Fix. See the
allows
Table , “Summary Table of Changes” on page
Table , “Summary Table of Changes” on page
the
FIQ
handler
to
be
placed
9.
9.
directly
®
core parallel JTAG registers,
at
Specification Update
the
FIQ
vector