RL78/G1P
CHAPTER 5 CLOCK GENERATOR
R01UH0895EJ0100 Rev.1.00
115
Nov 29, 2019
5.5 Clock Generator Operation
The clock generator generates the following clocks and controls the operation modes of the CPU, such as standby
mode (see
Figure 5-1
).
Main system clock f
MAIN
High-speed system clock f
MX
X1 clock f
X
External main system clock f
EX
High-speed on-chip oscillator clock f
IH
Low-speed on-chip oscillator clock f
IL
CPU/peripheral hardware clock f
CLK
The CPU starts operation when the high-speed on-chip oscillator starts outputting after a reset release in the
RL78/G1P.
When the power supply voltage is turned on, the clock generator operation is shown in Figure 5-13.