Registers Controlling Clock Generator - NEC 78K0R/KE3 User Manual

Remark f : X1 clock oscillation frequency
X
f : Internal high-speed oscillation clock frequency
IH
f : External main system clock frequency
EX
f : High-speed system clock frequency
MX
f : Main system clock frequency
MAIN
<R>
f : Main system select clock frequency
MAINC
f : XT1 clock oscillation frequency
XT
f : Subsystem clock frequency
SUB
f : CPU/peripheral hardware clock frequency
CLK
f : Internal low-speed oscillation clock frequency
IL

5.3 Registers Controlling Clock Generator

The following eight registers are used to control the clock generator.
• Clock operation mode control register (CMC)
• Clock operation status control register (CSC)
• Oscillation stabilization time counter status register (OSTC)
• Oscillation stabilization time select register (OSTS)
• System clock control register (CKC)
• Peripheral enable registers 0 (PER0)
• Operation speed mode control register (OSMC)
• Internal high-speed oscillator trimming register (HIOTRM)
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CHAPTER 5 CLOCK GENERATOR
User's Manual U17854EJ9V0UD