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CHAPTER 6 CLOCK GENERATOR
(2) Oscillator mode register (OSCM)
The
µ
PD780973(A) can be set to the reduced current consumption mode by setting OSCM (only when operated
at f
X
= 4 to 4.19 MHz).
OSCM is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets OSCM to 00H.
Figure 6-3. Oscillator Mode Register (OSCM) Format
Address: FFA0H After Reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
OSCM
HALFOSC
0
0
0
0
0
0
0
HALFOSC
Oscillator Mode Selection
0
Normal operation mode
1
Reduced current consumption mode (only when operated at f
X
= 4 to 4.19 MHz)
Cautions 1. This function is available only when the device is operated at f
X
= 4 to 4.19 MHz. In other cases,
be sure not to set 1 to bit 7.
2. When using in normal operation mode, setting OSCM is not necessary.
3. Only the first setting of OSCM is effective.
Содержание mPD780973 Series
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