upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 112

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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 Ring-OSC oscillator
always oscillates after RESET release (240 kHz (TYP.)).
5.4.5 Prescaler
the clock to be supplied to the CPU.
112
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 Connection of products with a rank other than K and I. For the connection of the products with rank K and I,
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
Ring-OSC oscillator is incorporated in the 78K0/KC1.
“Can be stopped by software” or “Cannot be stopped” can be selected by a mask option. The Ring-OSC clock
The prescaler generates various clocks by dividing the X1 oscillator output when the X1 input clock is selected as
Caution When the Ring-OSC clock is selected as the clock supplied to the CPU, the prescaler generates
refer to Note 1 of Table 2-2 Pin I/O Circuit Types.
point is in the middle of the power supply voltage.
various clocks by dividing the Ring-OSC 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 U16227EJ3V0UD
P-ch
FRC
XT2
X
= 240 kHz (TYP.)).