upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 360

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

operation. Even if CLME is set to 1 by software during the oscillation stabilization time (reset value of OSTS register
is 05H (2
clock ends. Monitoring is automatically started at the end of the oscillation stabilization time.
360
Internal reset signal
RESET input clears bit 0 (CLME) of the clock monitor mode register (CLM) to 0 and stops the clock monitor
Clock monitor status
Ring-OSC clock
X1 input clock
Ring-OSC clock
CPU operation
X1 input clock
16
/f
(CLME = 1 is set after RESET input and during X1 input clock oscillation stabilization time)
XP
CLMRF
)) of the X1 input clock, monitoring is not performed until the oscillation stabilization time of the X1 input
CLME
RESET
CLME
(1) When internal reset is executed by oscillation stop of X1 input clock
Monitoring
operation
Normal
(2) Clock monitor status after RESET input
Figure 19-3. Timing of Clock Monitor (1/4)
Oscillation
Oscillation
stopped
stopped
Reset
CHAPTER 19 CLOCK MONITOR
User’s Manual U16227EJ3V0UD
Clock supply
17 clocks
Monitoring stopped
4 clocks of Ring-OSC clock
stopped
Oscillation stabilization time
Set to 1 by software
Normal operation (Ring-OSC clock)
stabilization time
Waiting for end
of oscillation
Monitoring