CHAPTER 14: External Bus Interface
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 805
[bit11] MPXDOFF: MPX Address Data OFF
This bit is used to select whether or not the address is output to the data lines in multiplex mode.
(The address is used from the MAD outputs but set this bit if you use the ALE signal.)
Outputs the address to the data lines (Initial value).
Does not output the address to the data lines (It becomes Hi-Z during ALC period).
Note:
− See Reference Information for specific operations.
[bit10] Reserved: Reserved bit
The read value is undefined.
Set this bit to "0" when writing.
[bit9] ALEINV: ALE Inverter
This bit is used to set up the polarity of the ALE signal.
ALE signal becomes positive polarity (Initial value).
ALE signal becomes negative polarity.
Note:
− To connect multiple devices and use the ALE signal, it is recommended to use the same polarity
for their ALE signals.
[bit8] MPXMODE: MPX MODE
This bit is used to select operation bus mode.
Selects separate mode (Initial value).
[bit7] SHRTDOUT: Short Data Out
This bit is used to select to which idle cycle the write data output is extended.
Extends the write data output to the last idle cycle (Initial value).
Stops the write data output at the first idle cycle.
Note:
− See "■Reference Information" for specific operations.
[bit6] RDY: RDY Mode On
This bit is used to control the external RDY function.
External RDY mode OFF (Initial value)
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