upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 123

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) Memory expansion wait setting register (MM)
Address: FFF8H
Symbol
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.
Cautions 1. To control wait with external wait pin, be sure to set WAIT/P66 pin to input mode
PW1
Figure 5-4. Format of Memory Expansion Wait Setting Register (MM)
7
0
0
0
1
1
After reset: 10H
2. If the external wait pin is not used for wait control, the WAIT/P66 pin can be used
(set bit 6 (PM66) of port mode register 6 (PM6) to 1).
as an I/O port pin.
PW0
6
0
0
1
0
1
CHAPTER 5 EXTERNAL BUS INTERFACE
R/W
No wait
Wait (one wait state inserted)
Setting prohibited
Wait control by external wait pin
PW1
User’s Manual U15947EJ3V1UD
5
PW0
4
3
0
Wait control
2
0
1
0
0
0
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