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APPENDIX
APPENDIX C Pin Status in Each CPU State
Table C-1 "Terms related to pin status" explains the terms related to pin status, and
Table C-2 "Pin status in 16-bit mode of the external bus" to Table C-4 "Pin status in
single-chip mode" list the pin status in each CPU state.
I Terms related to pin status
Table C-1 "Terms related to pin status" lists the meanings of the terms related to pin status.
Table C-1 Terms related to pin status
Term
Input enabled
This means that the input function can be used.
Keep the input at 0
An external input is shut off at the input gate that is nearest to the pin and 0 is
internally transferred.
Output Hi-Z
This means that the pin drive transistor enters the drive-disabled state and that the pin
is set to high impedance.
Output retained
This means that the output immediately before this mode continues to be output.
In other words, if a built-in peripheral circuit with an output is in operation, output is
performed in accordance with that built-in peripheral circuit and retained for port
output.
Retaining the last
This means that the output status immediately before this mode was entered
status
continues. If input was performed immediately before this mode was entered, this term
indicates that input will continue to be enabled.
452
Meaning
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