MC68HC912D60A MOTOROLA [Motorola, Inc], MC68HC912D60A Datasheet - Page 387
MC68HC912D60A
Manufacturer Part Number
MC68HC912D60A
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC912D60A.pdf
(460 pages)
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19.4.4.2 Disabling BDM lockout
19.4.5 BDM Registers
MC68HC912D60A — Rev 3.0
MOTOROLA
NOTE:
Disabling the BDM lockout is only possible in special modes
(SMODN=0) except in special single chip mode. Follow the same steps
as for enabling the BDM lockout, but erase the SHADOW byte.
At the next reset, the SHADOW byte is loaded into the EEMCR register.
NOBDML bit in EEMCR will be set and BDM becomes operational.
When the BDM lockout is enabled it is not possible to run code from the
reset vector in special single chip mode.
Seven BDM registers are mapped into the standard 64-Kbyte address
space when BDM is active. Mapping is shown in
4. Protect the SHADOW byte by setting SHPROT bit in EEPROT
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
program other bits of the SHADOW byte (location $0FC0);
otherwise some regular EEPROM array locations will not be
visible. At the next reset, the SHADOW byte is loaded into the
EEMCR register. NOBDML bit in EEMCR will be cleared and BDM
will not be operational.
register.
The INSTRUCTION register content is determined by the type of
background command being executed.
The STATUS register indicates BDM operating conditions.
The SHIFT register contains data being received or transmitted
via the serial interface.
Go to: www.freescale.com
$FF02 - $FF03
$FF04 - $FF05
Development Support
Address
$FF00
$FF01
$FF06
Table 19-4. BDM registers
BDM CCR Holding Register
BDM Instruction Register
BDM Address Register
BDM Status Register
BDM Shift Register
Register
Table
Background Debug Mode
Development Support
19-4.
Technical Data
387
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