User`s manual

Am186
TM
CC Microcontroller ISDN TA Reference Design Manual
2-18
RESCON Configuration
The RESCON register provides a way to make design-specific hardware
configuration information available to software. The RESCON register is read
from AD[0..15] during reset. Because the Am186CC communications controller
has weak internal pulldowns, the default value is logic Low. Setting a bit requires
a 10-kΩ pullup resistor. Figure 2-12 shows the RESCON register bits.
Figure 2-12. RESCON Register Bits
• Validation Board - Identifies if the board is a validation board.
• Board ID - Unique board identifier that is used to determine what features are
available to the software.
• 0 - Bits are reserved for future use.
• Panic Bit - Used by software to boot in a safe mode (not currently supported).
• TIP - Identifies the TIP board as being present in the system.
• Board Configuration - Identifies particular population option for the board.
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