upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 87

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(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
RCM
Notes 1. The value of this register is 00H immediately after a reset release but automatically
Caution When setting RSTOP to 1, be sure to confirm that the CPU operates with a clock
LSRSTOP
RSTOP
RSTS
RSTS
<7>
0
1
0
1
0
1
After reset: 80H
2. Bit 7 is read-only.
Figure 5-4. Format of Internal Oscillation Mode Register (RCM)
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)
changes to 80H after internal high-speed oscillator has been stabilized.
Waiting for accuracy stabilization of internal high-speed oscillator
Stability operating of internal high-speed oscillator
Internal low-speed oscillator oscillating
Internal low-speed oscillator stopped
Internal high-speed oscillator oscillating
Internal high-speed oscillator stopped
6
0
Note 1
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 5 CLOCK GENERATOR
R/W
5
0
Note 2
Internal high-speed oscillator oscillating/stopped
Internal low-speed oscillator oscillating/stopped
Note 1
Status of internal high-speed oscillator
.
4
0
3
0
2
0
LSRSTOP
<1>
RSTOP
<0>
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