upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 132
upd78f0148m1gka1-9eu
Manufacturer Part Number
upd78f0148m1gka1-9eu
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0148M1GKA1-9EU.pdf
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6.3
(1) Processor clock control register (PCC)
132
The following six registers are used to control the clock generator.
• Processor clock control register (PCC)
• Internal oscillation 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.
Registers Controlling Clock Generator
is in the middle of the power supply voltage (see Figure 6-11 Subsystem Clock Feedback Resistor).
CHAPTER 6 CLOCK GENERATOR
User’s Manual U15947EJ3V1UD
Note
of the subsystem clock oscillator.
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