upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 102

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

5.3 Registers Controlling Clock Generator
(1) Processor clock control register (PCC)
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The following six registers are used to control the clock generator.
• Processor clock control register (PCC)
• Ring-OSC mode register (RCM)
• Main clock mode register (MCM)
• Main OSC control register (MOC)
• Oscillation stabilization time counter status register (OSTC)
• Oscillation stabilization time select register (OSTS)
Note The feedback resistor is required to control the bias point of the oscillation waveform so that the bias point
The PCC register is used to select the CPU clock, the division ratio, main system clock oscillator operation/stop
and whether to use the on-chip feedback resistor
PCC can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears PCC to 00H.
is in the middle of the power supply voltage (see Figure 5-11 Subsystem Clock Feedback Resistor).
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16227EJ3V0UD
Note
of the subsystem clock oscillator.