TMP92CF30
2009-06-12
92CF30-37
(2)
Reduced drivability for low-frequency oscillator circuit
(Purpose)
Reduces noise and power for oscillator when a resonator is used.
(Block diagram)
(Setting method)
The drivability of the oscillator is reduced by writing “0” to the
EMCCR0<DRVOSCL> register. At Reset, <DRVOSCL> is initialized to “1”.
(3)
Single drive for high-frequency oscillator circuit
(Purpose)
Remove the need for twin-drives and protect prevent operational errors caused by
noise input to X2 pin when an external-oscillator is used.
(Block diagram)
(Setting method)
The oscillator is disabled and starts operation as buffer by writing “1” to
EMCCR0<EXTIN> register. X2 pin’s output is always “1”.
At reset, <EXTIN> is initialized to “0”.
Note: Do not write EMCCR0<EXTIN>
=
“1” when using external resonator.
f
S
Enable oscillation
EMCCR0<DRVOSCL>
XT1 pin
XT2 pin
C1
C2
Resonator
f
OSCH
Enable oscillation
EMCCR0<DRVOSCH>
X1 pin
X2 pin
Содержание TLCS-900/H1 Series
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