Motorola MPC533 Reference Manual page 954

Programming Model
HRESET
(Tool drives)
EVTI
1
(Tool drives)
RSTI
(Tool drives)
MSEO
Device sends out
DID message after
negation of RSTI
MDO
MSEI
Tool sends in DC message with
desired program trace mode enabled.
(BDM can also be enabled through.
DC register configuration. See figure
note below)
MDI
NOTE:
If background debug mode (BDM) is enabled,
the ICTRL register cannot be modified through
user program. This register can only be accessed
through the development port.
Figure 22-11. Enabling Program Trace Out of System Reset
22-22
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
EVTI must be asserted
4 system clocks prior to the
negation of RSTI to enable
READI module.
2
DID Message
TCODE=1
MPC533 Reference Manual
After the HRESET negation,
the device will start executing
the reset instruction sequence
user program. In this user program,
set the ISCTL field = 0b01 in the
ICTRL register. Also the USIU
should be programmed to ignore
instruction showcycles to avoid
impacting U-bus performance.
4
Device Ready
TCODE=16
3
DC Message
TCODE=18
Tool negates HRESET
16 clocks after receiving
device ready message.
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