Definition Of Oscillation Stabilization Wait Time; Figure 4.11 Negative Resistance Measurement And Circuit Modification Suggestions - Renesas H8/3847R Series Hardware Manual

C1
C2
Negative resistance,
addition of −R
(1) Negative Resistance Measuring Circuit
Modification
point
C1
C2
(3) Oscillator Circuit Modification Suggestion 2

Figure 4.11 Negative Resistance Measurement and Circuit Modification Suggestions

4.5.1

Definition of Oscillation Stabilization Wait Time

Figure 4.12 shows the oscillation waveform (OSC2), system clock (φ), and microcomputer
operating mode when a transition is made from standby mode, watch mode, or subactive mode, to
active (high-speed/medium-speed) mode, with an oscillator element connected to the system clock
oscillator.
As shown in figure 4.12, as the system clock oscillator is halted in standby mode, watch mode,
and subactive mode, when a transition is made to active (high-speed/medium-speed) mode, the
sum of the following two times (oscillation stabilization time and wait time) is required.
OSC1
Rf
OSC2
OSC1
Rf
OSC2
Section 4 Clock Pulse Generators
Modification
point
C1
C2
(2) Oscillator Circuit Modification Suggestion 1
Modification
point
C3
C1
C2
(4) Oscillator Circuit Modification Suggestion 3
Rev. 6.00 Aug 04, 2006 page 127 of 680
OSC1
Rf
OSC2
OSC1
Rf
OSC2
REJ09B0145-0600