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APPENDIX
A
REGISTER SUMMARY
Table A-1 on page A-2 provides a summary of all the Am186CC/CH/CU microcontrollers'
peripheral control block (PCB) registers, listed in offset order. The table includes the
following information for each register:
Abbreviated name
Register description page number
Relative offset from the PCB base (set in RELOC)
Default location in I/O space (equal to the default PCB base of FC00h plus the register's
relative offset)
Default value at reset
Bit and field names and layout
An "x" in the default value column denotes a digit for which the default value is not defined.
A "?" indicates that the digit's value depends on external inputs. If a digit contains both
undefined and external input bits, a "?" is used.
If more than one default value is given for a register, it contains one or more bits with
undefined defaults. In this case either value might be present.
If a group of registers is not supported on all the Am186CC/CH/CU microcontrollers, the
group heading indicates the controllers that support that group of registers. An exclamation
point (!) following a specific bit or register name indicates that additional controller-specific
information can be found in the individual register or bit description.
Am186™CC/CH/CU Microcontrollers User's Manual
A-1
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