hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 157

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

4.5.1
Figure 4.14 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 4.13, 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.
Modification
point
Figure 4.13 Negative Resistance Measurement and Circuit Modification Suggestions
(3) Oscillator Circuit Modification Suggestion 2
(1) Negative Resistance Measuring Circuit
Definition of Oscillation Stabilization Wait Time
C2
C1
C2
C1
Negative resistance,
addition of −R
Rf
Rf
OSC1
OSC2
OSC1
OSC2
Modification
point
(2) Oscillator Circuit Modification Suggestion 1
(4) Oscillator Circuit Modification Suggestion 3
Rev. 7.00 Mar 10, 2005 page 115 of 652
C1
Modification
point
C2
C2
C1
Section 4 Clock Pulse Generators
C3
Rf
Rf
REJ09B0042-0700
OSC1
OSC2
OSC1
OSC2