US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 137
![no-image](/images/manufacturer_photos/0/5/560/renesas_electronics_america_sml.jpg)
US38024-BAG1
Manufacturer Part Number
US38024-BAG1
Description
DEV EVALUATION KIT H8/38024
Manufacturer
Renesas Electronics America
Series
H8®r
Type
MCUr
Datasheet
1.US38024-BAG1.pdf
(684 pages)
Specifications of US38024-BAG1
Contents
2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
For Use With/related Products
H8/38024
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 137 of 684
- Download datasheet (5Mb)
4.5
Oscillator characteristics are closely related to board design and should be carefully evaluated by
the user in mask ROM and ZTAT versions, referring to the examples shown in this section.
Oscillator circuit constants will differ depending on the oscillator element, stray capacitance in its
interconnecting circuit, and other factors. Suitable constants should be determined in consultation
with the oscillator element manufacturer. Design the circuit so that the oscillator element never
receives voltages exceeding its maximum rating.
Figure 4.13 (1) shows an example measuring circuit with the negative resistance suggested by the
resonator manufacturer. Note that if the negative resistance of the circuit is less than that suggested
by the resonator manufacturer, it may be difficult to start the main oscillator.
If it is determined that oscillation is not occurring because the negative resistance is lower than the
level suggested by the resonator manufacturer, the circuit may be modified as shown in figure 4.13
(2) through (4). Which of the modification suggestions to use and the capacitor capacitance should
be decided based upon an evaluation of factors such as the negative resistance and the frequency
deviation.
Figure 4.12 Example of Crystal and Ceramic Oscillator Element Arrangement
Note on Oscillators
P17
X
X
V ss
OSC
OSC
TEST
1
2
2
1
(V ss )
Rev. 8.00 Mar. 09, 2010 Page 115 of 658
Section 4 Clock Pulse Generators
REJ09B0042-0800
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