upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 110
upd78f0114m6gb-8es
Manufacturer Part Number
upd78f0114m6gb-8es
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114M6GB-8ES.pdf
(534 pages)
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Caution When using the X1 oscillator and subsystem clock oscillator, wire as follows in the area
Figure 5-10 shows examples of incorrect resonator connection.
Remark When using the subsystem clock, replace X1 and X2 with XT1 and XT2, respectively. Also, insert
enclosed by the broken lines in Figures 5-8 and 5-9 to avoid an adverse effect from wiring
capacitance.
resistors in series on the XT2 side.
Note that the subsystem clock oscillator is designed as a low-amplitude circuit for reducing
power consumption.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines.
• Do not route the wiring near a signal line through which a high fluctuating current flows.
• Always make the ground point of the oscillator capacitor the same potential as V
• Do not fetch signals from the oscillator.
(a) Too long wiring
not ground the capacitor to a ground pattern through which a high current flows.
V
Figure 5-10. Examples of Incorrect Resonator Connection (1/2)
SS
X1
CHAPTER 5 CLOCK GENERATOR
X2
User’s Manual U16227EJ3V0UD
V
SS
(b) Crossed signal line
X1
PORT
X2
SS
. Do
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