MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 159

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
In monitor mode, the MCU uses different vectors for reset, SWI
(software interrupt), and break interrupt than those for user mode. The
alternate vectors are in the $FE page instead of the $FF page and allow
code execution from the internal monitor firmware instead of user code.
Exiting monitor mode after it has been initiated by having a blank reset
vector requires a power-on reset (POR). Pulling RST low will not exit
monitor mode in this situation.
Table 10-2
mode vectors.
Freescale Semiconductor, Inc.
Monitor
Modes
For More Information On This Product,
Figure 10-2. Low-Voltage Monitor Mode Entry Flowchart
User
summarizes the differences between user mode and monitor
Go to: www.freescale.com
Table 10-2. Mode Differences (Vectors)
Vector
$FEFE
$FFFE
Reset
High
MONITOR MODE
TRIGGERED?
POR RESET
IS VECTOR
EXECUTE
MONITOR
BLANK?
CODE
Vector
$FFFF
$FEFF
Reset
POR
Low
YES
YES
NO
Vector
$FFFC
$FEFC
NO
Break
High
Functions
NORMAL USER
$FEFD
Vector
$FFFD
Break
Low
MODE
Functional Description
Monitor ROM (MON)
$FEFC
Vector
$FFFC
High
SWI
Data Sheet
Vector
$FFFD
$FEFD
Low
SWI
159