NEC mPD78F0730 Preliminary User's Manual page 87

(3) Internal oscillation mode register (RCM)
This register sets the operation mode of internal oscillators.
RCM can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 80H
Address: FFA0H
Symbol
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Figure 5-4. Format of Internal Oscillation Mode Register (RCM)
After reset: 80H
<7> 6
RCM RSTS 0
RSTS
0 Waiting for accuracy stabilization of internal high-speed oscillator
1 Stability operating of internal high-speed oscillator
LSRSTOP
0 Internal low-speed oscillator oscillating
1 Internal low-speed oscillator stopped
RSTOP
0 Internal high-speed oscillator oscillating
1 Internal high-speed oscillator stopped
Notes 1. The value of this register is 00H immediately after a reset release but automatically
changes to 80H after internal high-speed oscillator has been stabilized.
2. Bit 7 is read-only.
Caution When setting RSTOP to 1, be sure to confirm that the CPU operates with a clock
other than the internal high-speed oscillation clock. Specifically, set RSTOP to 1
under the following condition.
• When MCS = 1 (when CPU operates with the high-speed system clock)
CHAPTER 5 CLOCK GENERATOR
Note 1
.
Note 1 Note 2
R/W
5 4
0 0
Status of internal high-speed oscillator
Internal low-speed oscillator oscillating/stopped
Internal high-speed oscillator oscillating/stopped
Preliminary User's Manual U19014EJ1V0UD
3 2 <1>
0 0 LSRSTOP
<0>
RSTOP
87