AN2104 Freescale Semiconductor, AN2104 Datasheet - Page 10
AN2104
Manufacturer Part Number
AN2104
Description
Using Background Debug Mode
Manufacturer
Freescale Semiconductor
Datasheet
1.AN2104.pdf
(20 pages)
Application Note
Operating Mode and Background Debug Mode Hints
10
Normal expanded narrow:
Special expanded narrow:
Normal expanded wide:
Special expanded wide:
Special single-chip:
Normal single-chip:
Reset states:
Peripheral:
Address:
These hints will help steer the user away from the most commonly made
mistakes.
Read:
Write:
•
•
•
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Freescale Semiconductor, Inc.
For More Information On This Product,
The states of the MODA and MODB pins, upon power-up,
determine how the port A and port B pins will be configured (see
Table
The BKGD pin is used for two purposes:
– It determines, upon reset, which operating mode the part will
– Then it is used as the serial communication pin for the BDM.
Once the part is operating in a mode, the mode can be changed
by writing to the mode register. The limitations to this are listed in
Figure
When in normal operating mode, special modes cannot be
accessed.
SMODN
$000B
Bit 7
1
1
0
0
0
1
0
Figure 5. Mode Register (MODE)
enter, normal or special (see
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4).
5.
MODB
6
0
1
0
1
1
0
0
MODA
5
1
1
1
1
0
0
0
ESTR
4
1
1
1
1
1
1
1
Table
IVIS
3
0
0
1
1
1
0
1
4).
EBSWAI
2
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
AN2104
EME
Bit 0
0
0
1
1
1
0
1