CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U19014EJ1V0UD
106
5.6.5 Clocks supplied to CPU and peripheral hardware
The following table shows the relation among the clocks supplied to the CPU and peripheral hardware, and setting
of registers.
Table 5-3. Clocks Supplied to CPU and Peripheral Hardware, and Register Setting
Supplied Clock
Clock Supplied to CPU
Clock Supplied to Peripheral Hardware
XSEL CSS MCM0
EXCLK
Internal high-speed oscillation clock
0
0
×
×
X1 clock
1 0 1 0
External main system clock
1
0
1
1
Remarks 1.
XSEL: Bit 2 of the main clock mode register (MCM)
2.
CSS:
Bit 4 of the processor clock control register (PCC)
3.
MCM0: Bit 0 of MCM
4.
EXCLK: Bit 7 of the clock operation mode select register (OSCCTL)
5.
×
: don’t
care
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