
CHAPTER 20 CLOCK MONITOR
Preliminary User’s Manual U16315EJ1V0UD
364
Figure 20-3. Timing of Clock Monitor (2/3)
(3) Clock monitor status after STOP mode is released
(CLME = 1 is set when CPU clock operates on Ring-OSC clock and before entering STOP mode)
Clock monitor status
Monitoring
Monitoring
stopped
Monitoring stopped
Monitoring
CLME
Ring-OSC clock
X1 input clock
CPU operation
Normal
operation
17 clocks
Clock supply
stopped
Normal operation (Ring-OSC clock)
Oscillation
stopped
Oscillation stabilization time
(set by OSTS register)
STOP
When bit 0 (CLME) of the clock monitor mode register (CLM) is set to 1 before entering STOP mode, monitoring
automatically starts at the end of the X1 input clock oscillation stabilization time. Monitoring is stopped in STOP mode
and during the oscillation stabilization time.
(4) Clock monitor status after RESET input
(CLME = 1 is set after RESET input and during X1 input clock oscillation stabilization time)
CPU operation
Clock monitor status
CLME
Ring-OSC clock
X1 input clock
Reset
Oscillation
stopped
Oscillation stabilization time
Normal
operation
Clock supply
stopped
Normal operation (Ring-OSC clock)
Monitoring
Monitoring stopped
Monitoring
Waiting for end
of oscillation
stabilization time
Oscillation
stopped
17 clocks
Set to 1 by software
RESET
RESET input clears bit 0 (CLME) of the clock monitor mode register (CLM) to 0 and stops the clock monitor
operation. Even if CLME is set to 1 by software during the oscillation stabilization time of the X1 input clock,
monitoring is not performed until the oscillation stabilization time of the X1 input clock ends. Monitoring is
automatically started at the end of the oscillation stabilization time.
Содержание 78K0/KD1 Series
Страница 2: ...Preliminary User s Manual U16315EJ1V0UD 2 MEMO ...
Страница 444: ...Preliminary User s Manual U16315EJ1V0UD 444 MEMO ...