NEC 78K0 User Manual page 343

Figure 17-6. STOP Mode Release by Interrupt Request Generation (2/2)
Standby release signal
Operating mode
Status of CPU
(Ring-OSC clock)
Ring-OSC clock
Remarks 1. The broken lines indicate the case when the interrupt request that has released the standby
mode is acknowledged.
2. f : Ring-OSC clock oscillation frequency
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(b) Release by RESET input
When the RESET signal is input, STOP mode is released and a reset operation is performed after the
oscillation stabilization time has elapsed.
RESET signal
Status of CPU
Operating mode
(X1 input clock)
Oscillates
X1 input clock
RESET signal
Status of CPU
Operating mode
(Ring-OSC clock)
Ring-OSC clock
Remarks 1. f : X1 input clock oscillation frequency
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2. f : Ring-OSC clock oscillation frequency
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CHAPTER 17 STANDBY FUNCTION
(2) When Ring-OSC clock is used as CPU clock
STOP
instruction
STOP mode
Figure 17-7. STOP Mode Release by RESET Input
(1) When X1 input clock is used as CPU clock
STOP
instruction
STOP mode
Oscillation stopped
(2) When Ring-OSC clock is used as CPU clock
STOP
instruction
STOP mode
Oscillates
User's Manual U16227EJ2V0UD
Operation
Operating mode
stopped
(Ring-OSC clock)
(17/f )
R
Oscillates
Reset
Operation
period Operating mode
stopped
(17/f ) (Ring-OSC clock)
R
Oscillation
Oscillates
stopped
Oscillation stabilization time (2
Reset
Operation
period Operating mode
stopped
(17/f ) (Ring-OSC clock)
R
Oscillation
Oscillates
stopped
11 16
/f to 2 /f )
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