upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 110
upd78f0114hgb-8es-a
Manufacturer Part Number
upd78f0114hgb-8es-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114HGB-8ES-A.pdf
(505 pages)
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5.4.4 When subsystem clock is not used
connect the XT1 and XT2 pins as follows.
5.4.5 Internal oscillator
clock always oscillates after RESET release (240 kHz (TYP.)).
5.4.6 Prescaler
speed system clock is selected as the clock to be supplied to the CPU.
110
If it is not necessary to use the subsystem clock for low power consumption operations and watch operations,
XT1: Connect directly to EV
XT2: Leave open
Note When the subsystem clock is not used, the on-chip feedback resistor must be set after a reset is released
Remark The feedback resistor is required to control the bias point of the oscillation waveform so that the bias
Internal oscillator is incorporated in the 78K0/KC1+.
“Can be stopped by software” or “Cannot be stopped” can be selected by the option byte. The internal oscillation
The prescaler generates various clocks by dividing the high-speed system clock oscillator output when the high-
Caution When the internal oscillation clock is selected as the clock supplied to the CPU, the prescaler
so that it is not used (bit 6 (FRC) of processor clock control register (PCC) = 1).
point is in the middle of the power supply voltage.
generates various clocks by dividing the internal oscillator output (f
SS
Figure 5-13. Subsystem Clock Feedback Resistor
or V
SS
Feedback resistor
XT1
Note
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16961EJ4V0UD
P-ch
FRC
XT2
X
= 240 kHz (TYP.)).
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