UM0434 datasheet(186/390 Pages) STMICROELECTRONICS

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UM0434

Interrupts and exceptions

187/391

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(1)

Debug: UDE

Debug: DEVT1

Debug: DEVT2

Debug: DCNT1

Debug: DCNT2

Debug: IDE

Assertion of

p_ude (unconditional debug event)

Assertion of

p_devt1 and event enabled (external debug

event 1)

Assertion of

p_devt2 and event enabled (external debug

event 2)

Debug counter 1 exception

Debug counter 2 exception

Imprecise debug event (event imprecise due to earlier,

higher priority interrupt

Critical Input

Assertion of

p_critint_b

Watchdog timer

Watchdog timer first enabled time-out

External input

Assertion of

p_extint_b

Fixed-interval timer

Posting of a fixed-interval timer exception in TSR due to

programmer-specified bit transition in the time base register

Decrementer

Posting of a decrementer exception in TSR due to

programmer-specified decrementer condition

Instruction fetch exceptions

Debug: IAC

(unlinked)

Instruction address compare match for enabled IAC debug

event and DBCR0[IDM] asserted

ITLB error

Instruction translation lookup miss in the TLB

Instruction storage

Access control

Precise external termination error (

p_tea_b assertion and

precise recognition) and MSR[EE] = 1

Byte ordering due to misaligned instruction across page

boundary to pages with mismatched VLE bits, or access to

page with VLE set and E indicating little-endian.

Misaligned Instruction fetch due to a change of flow to an

odd halfword instruction boundary on a BookE (non-VLE)

instruction page, due to value in LR, CTR, or

xSRR0

Instruction dispatch/execution interrupts

Program: Illegal

Attempted execution of an illegal instruction

Program: privileged

Attempted execution of a privileged instruction in user mode

Floating-point

unavailable

Any floating-point unavailable exception condition

SPE unavailable

Any SPE unavailable exception condition

Program:

unimplemented

Attempted execution of an unimplemented instruction

Table 148.

e200z3 exception priorities (continued)

Priority

Exception

Cause

IVOR

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