m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 63
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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which is externally generated can be input. Oscillation circuit examples are shown below.
CLOCK GENERATING CIRCUIT
4.1 Oscillation circuit examples
4.1 Oscillation circuit examples
To the oscillation circuit, a ceramic resonator or a quartz-crystal oscillator can be connected, or the clock
4-2
4.1.1 Connection example with resonator/oscillator
Figure 4.1.1 shows an example where pins X
oscillator.
The circuit constants such as R
oscillator. These values shall be set to the values recommended by the resonator/oscillator manufacturer.
4.1.2 Externally generated clock input example
Figure 4.1.2 shows an input example of a clock which is externally generated. An external clock must be
input from pin X
When an externally generated clock is input, the power source current consumption can be saved by the
stop of internal circuit’s operation between pins X
FUNCTION.”)
IN
, and pin X
OUT
f
must be left open.
, R
d
, C
7905 Group User’s Manual Rev.1.0
IN
, and C
IN
and X
OUT
IN
and X
(shown in “Figure 4.1.1”) depend on the resonator/
OUT
Fig. 4.1.1 Connection example of resonator/oscillator
Fig. 4.1.2 Externally generated clock input example
connect across a ceramic resonator/quartz-crystal
OUT
. (Refer to “CHAPTER 16. POWER SAVING
Vcc
Vss
Externally generated clock
X
X
IN
IN
C
M37905
IN
M37905
R
f
X
Open
OUT
X
OUT
R
C
d
OUT
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