RL78/G1P
CHAPTER 16 STANDBY FUNCTION
R01UH0895EJ0100 Rev.1.00
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Nov 29, 2019
(b) Release by reset signal generation
When the reset signal is generated, HALT mode is released, and then, as in the case with a normal reset
operation, the program is executed after branching to the reset vector address.
Figure 16-4. HALT Mode Release by Reset
(1) When high-speed system clock is used as CPU clock
HALT
instruction
Reset signal
High-speed
system clock
(X1 oscillation)
HALT mode
Reset
period
Oscillates
Oscillation
stopped
Oscillates
Status of CPU
Normal operation
(high-speed
system clock)
Oscillation stabilization time
(check by using OSTC register)
Normal operation
(high-speed on-chip
oscillator clock)
Oscillation
stopped
Note
Starting X1 oscillation is
specified by software.
(2) When high-speed on-chip oscillator clock is used as CPU clock
HALT
instruction
Reset signal
High-speed on-chip
oscillator clock
Normal operation
(high-speed on-chip
oscillator clock)
HALT mode
Reset
period
Normal operation
(high-speed on-chip
oscillator clock)
Oscillates
Oscillation
stopped
Oscillates
Status of CPU
Wait for oscillation
accuracy stabilization
Note
Note
For the reset processing time, see
CHAPTER 17 RESET FUNCTION.
For the reset processing time of the power-on-reset circuit (POR) and voltage detector (LVD), see
CHAPTER 18 POWER-ON-RESET CIRCUIT
.