HD6473847RHV Datasheet, PDF (137/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

OSC1
C1
Rf
OSC2
C2
Negative resistor -R added
(1) Negative resistor measurement circuit
Section 4 Clock Pulse Generators
Change
C1
C2
OSC1
Rf
OSC2
(2) Proposed Change in Oscillator Circuit 1
Change
Change
C1
C2
OSC1
Rf
OSC2
C3
C1
C2
OSC1
Rf
OSC2
(3) Proposed Change in Oscillator Circuit 2
(4) Proposed Change in Oscillator Circuit 3
Figure 4.14 Negative Resistor Measurement and Proposed Changes in Circuit
4.6.2 Notes on Board Design
When using a crystal resonator (ceramic resonator), place the resonator and its load capacitors as
close as possible to the OSC1 and OSC2 pins. Other signal lines should be routed away from the
resonator circuit to prevent induction from interfering with correct oscillation (see figure 4.15).
Avoid
Signal A Signal B
C₁
OSC1
C₂
OSC2
Figure 4.15 Example of Incorrect Board Design
Rev. 7.00 Mar. 08, 2010 Page 105 of 510
REJ09B0024-0700