MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 178
MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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Monitor ROM (MON)
12.4.1 Entering Monitor Mode
Advance Information
178
NOTE:
Table 12-1
Enter monitor mode by either
Once out of reset, the MCU waits for the host to send eight security bytes
(see
break signal (10 consecutive logic 0s) to the host computer, indicating
that it is ready to receive a command.
Monitor mode uses alternate vectors for reset, SWI and break interrupt.
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. The COP module is disabled in monitor mode as long as V
5.0 Volt DC Electrical Characteristics
either the IRQ1 pin or the RESET pin. (See
Integration Module (SIM)
Holding the PTC3 pin low when entering monitor mode causes a bypass
of a divide-by-two stage at the oscillator. The CGMOUT frequency is
equal to the CGMXCLK frequency, and the OSC1 input directly
generates internal bus clocks. In this case, the OSC1 signal must have
a 50% duty cycle at maximum bus frequency.
1. For V
page 444.
Freescale Semiconductor, Inc.
•
•
V
V
HI
HI
For More Information On This Product,
Security
(1)
(1)
Executing a software interrupt instruction (SWI) or
Applying a logic 0 and then a logic 1 to the RST pin.
HI
,
5.0 Volt DC Electrical Characteristics
1
1
shows the pin conditions for entering monitor mode.
Go to: www.freescale.com
on page 185). After the security bytes, the MCU sends a
0
0
Monitor ROM (MON)
1
1
Table 12-1. Mode Selection
1
0
Monitor
Monitor
Mode
for more information on modes of operation).
CGMXCLK
---------------------------- -
2
on page 446, and
on page 446), is applied to
CGMXCLK
CGMOUT
Section 7. System
or
CGMVCLK
---------------------------- -
68HC908AZ32A — Rev 0.0
2
Maximum Ratings
Frequency
MOTOROLA
CGMOUT
------------------------- -
CGMOUT
------------------------- -
Bus
HI
2
2
(see
on
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