upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 115
upd78f0124m6gba1-8et
Manufacturer Part Number
upd78f0124m6gba1-8et
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0124M6GBA1-8ET.pdf
(545 pages)
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5.4.3 When subsystem clock is not used
connect the XT1 and XT2 pins as follows.
(FRC) of the processor clock control register (PCC) to 1) after a reset is released.
5.4.4 Internal oscillator
always oscillates the internal oscillation clock after RESET release (240 kHz (TYP.)).
5.4.5 Prescaler
the clock to be supplied to the CPU.
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 This refers to connection in products with a rank other than K and I. For connection in the products with
When the subsystem clock is not used, set so that the use of the on-chip feedback resistor is disabled (setting bit 6
Remark The feedback resistor is required to control the bias point of the oscillation waveform so that the bias
An internal oscillator is incorporated in the 78K0/KD1.
“Can be stopped by software” or “Cannot be stopped” can be selected using a mask option. The internal oscillator
The prescaler generates various clocks by dividing the X1 oscillator output when the X1 input clock is selected as
Caution When the internal oscillation clock is selected as the clock supplied to the CPU, the prescaler
rank K or I, refer to Note 1 of Table 2-2 Pin I/O Circuit Types.
point is in the middle of the power supply voltage.
generates various clocks by dividing the internal oscillator output (f
SS
Figure 5-11. Subsystem Clock Feedback Resistor
or V
SS
Feedback resistor
XT1
Note
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16315EJ3V1UD
P-ch
FRC
XT2
X
= 240 kHz (TYP.)).
115
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