Renesas RL78/G10 User Manual

RL78/G10 CHAPTER 16 STANDBY FUNCTION
R01UH0384EJ0311 Rev. 3.11 531
Dec 22, 2016
Figure 16-3. STOP Mode Release by Interrupt Request Generation (2/2)
(2) When high-speed system clock (X1 oscillation) is used as CPU clock (16-pin products only)
Normal operation
(high-speed
system clock)
Normal operatio
n
(high-speed
system clock)
OscillatesOscillates
STOP
instruction
STOP mode
S
tandby release signal
Note 1
Oscillation stopped
High-speed
system clock
(X1 oscillation)
Status of CPU
Supply of the
clock is stopped
Interrupt
request
Wait
STOP mode release time
Note 2
Notes 1. For details of the standby release signal, see Figure 14-1 Basic Configuration of Interrupt Function.
2. STOP mode release time: Whichever is longer 27 μs (typ.) or the oscillation stabilization time (set by
OSTS)
Wait
• When vectored interrupt servicing is carried out: 14 to 15 clocks
• When vectored interrupt servicing is not carried out: 6 to 7 clocks
Caution To reduce the oscillation stabilization time after release from the STOP mode while CPU operates
based on the high-speed system clock (X1 oscillation), switch the clock to the high-speed on-chip
oscillator clock temporarily before executing the STOP instruction.
Remarks 1. The clock supply stop time varies depending on the temperature conditions and STOP mode period.
2. The broken lines indicate the case when the interrupt request that has released the standby mode is
acknowledged.
(3) When high-speed system clock (external clock input) is used as CPU clock
(16-pin products only)
Interrupt
request
STOP
instruction
Standby release signal
Note 1
Status of CPU
High-speed
system clock
(external clock input)
Oscillates
Normal operation
(high-speed
system clock)
STOP mode
Oscillation stopped
Oscillates
Normal operation
(high-speed
system clock)
Wait
Supply of the
clock is stopped
STOP mode release time
Note 2
Notes 1. For details of the standby release signal, see Figure 14-1 Basic Configuration of Interrupt Function.
2. STOP mode release time: 2
4
/fEX
Wait
• When vectored interrupt servicing is carried out: 11 clocks
• When vectored interrupt servicing is not carried out: 3 clocks
Remark The broken lines indicate the case when the interrupt request that has released the standby mode is
acknowledged.

Renesas RL78/G10 Specifications

General

Brand	Renesas
Model	RL78/G10
Category	Motherboard
Language	English