upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 367

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

oscillation clock is stopped, monitoring automatically starts after the internal oscillation clock is stopped. Monitoring is
stopped when oscillation of the internal oscillation clock is stopped.
Internal oscillation clock
When bit 0 (CLME) of the clock monitor mode register (CLM) is set to 1 before or while oscillation of the internal
Note If it is specified by the option byte that internal oscillator cannot be stopped, the setting of bit 0 (RSTOP) of
Clock monitor status
the internal oscillation mode register (RCM) is invalid. To set RSTOP, be sure to confirm that bit 1 (MCS) of
the main clock mode register (MCM) is 1.
CPU operation
(7) Clock monitor status after internal oscillation clock oscillation is stopped by software
system clock
High-speed
RSTOP
CLME
Note
Monitoring
Figure 20-3. Timing of Clock Monitor (4/4)
Normal operation (High-speed system clock or subsystem clock)
CHAPTER 20 CLOCK MONITOR
User’s Manual U16962EJ3V0UD
Oscillation stopped
Monitoring
stopped
Monitoring
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