CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U19014EJ1V0UD
84
Remarks 1.
f
X
:
X1 clock oscillation frequency
2.
f
RH
:
Internal high-speed oscillation clock frequency
3.
f
EXCLK
: External main system clock frequency
4.
f
XH
:
High-speed system clock oscillation frequency
5.
f
XP
:
Main system clock oscillation frequency
6.
f
PRS
:
Peripheral hardware clock oscillation frequency
7.
f
CPU
:
CPU clock oscillation frequency
8.
f
RL
:
Internal low-speed oscillation clock frequency
9.
f
USB
:
USB clock oscillation frequency
5.3 Registers Controlling Clock Generator
The following ten registers are used to control the clock generator.
•
Clock operation mode select register (OSCCTL)
•
Processor clock control register (PCC)
•
Internal oscillation mode register (RCM)
•
Main OSC control register (MOC)
•
Main clock mode register (MCM)
•
Oscillation stabilization time counter status register (OSTC)
•
Oscillation stabilization time select register (OSTS)
•
PLL control register (PLLC)
•
USB clock control register (UCKC)
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