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CHAPTER 18 EXTERNAL DEVICE EXPANSION FUNCTION
Preliminary User’s Manual U13420EJ2V0UM00
(2) Memory expansion wait setting register (MM)
MM sets the number of waits.
MM is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets MM to 10H.
Figure 18-3. Format of Memory Expansion Wait Setting Register (MM)
Address: FFF8H After reset: 10H R/W
Symbol
7
6
5
4
3
2
1
0
MM
0
0
PW1
PW0
0
0
0
0
PW1
PW0
Wait control
0
0
No wait
0
1
Wait (one wait state inserted)
1
0
Setting prohibited
1
1
Wait control by external wait pin
Содержание mPD780065 Series
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