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Signal Summary
Table 2-1. MPC533 Signal Descriptions (continued)
Signal Name
SGPIOC6 / FRZ / PTR
SGPIOC7 / LWP0 / IRQOUT
BG / VF0 / LWP1
BR / VF1 / IWP2
2-8
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
No. of
Function
Type
Signals
after Reset
Development and Debug
I/O
O
1
PTR
O
I/O
O
1
LWP0
O
I/O
Controlled by
RCW[DBGC]
1
See
O
Table 29-8.
O
I/O
Controlled by
1
RCW[DBGC]
O
See
Table 29-8.
O
MPC533 Reference Manual
Description
1
Port SGPIOC 6 – Allows the signals to be used as
general-purpose inputs/outputs.
Freeze – Indicates that the RCPU is in debug stopped
mode.
Program Trace – Indicates an instruction fetch is taking
place (for program flow tracking).
Port SGPIOC7 – Allows the signal to be used as
general-purpose inputs/outputs.
Load/Store Watchpoint 0 – This output signal reports the
detection of a data watchpoint in the program flow
executed by the RCPU. See Chapter 23, "Development
Support," for more details.
Interrupt Out – Indicates that an interrupt has been
requested to all external devices.
Bus Grant – Indicates external bus status. BG is asserted
low when the external bus arbiter grants ownership of the
external bus to a specific master. This is an active-low
signal and needs an external pull-up resistor to ensure
proper operation and meet signal timing specifications.
Visible Instruction Queue Flush Status 0 – This output
signal together with VF1 and VF2 is output by the MPC533
when program instruction flow tracking is required. VFs
report the number of instructions flushed from the
instruction queue in the internal core. See Chapter 23,
"Development Support," for more details.
Load/Store Watchpoint 1 – This output signal reports the
detection of a data watchpoint in the program flow
executed by the RCPU.
Bus Request – Indicates that the external bus has been
requested for external cycle. This is an active-low signal
and needs an external pull-up resistor to ensure proper
operation and meet signal timing specifications.
Visible Instruction Queue Flush Status 1 – This output
signal together with VF0 and VF2 is output by the MPC533
when program instruction flow tracking is required. VFs
report the number of instructions flushed from the
instruction queue in the internal core. See Chapter 23,
"Development Support," for more details.
Instruction Watchpoint 2 – This output signal reports the
detection of an instruction watchpoint in the program flow
executed by the RCPU.
MOTOROLA
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