MB90480B_10 Datasheet, PDF (68/124 Pages) Fujitsu Component Limited. – 16-bit Microcontroller

MB90480B/485B Series
16. Clock
The clock generator module controls the operation of the internal clock circuits that serve as the operating clock
for the CPU and peripheral devices. This internal clock is referred to as the machine clock, and one cycle is referred
to as a machine cycle. Also, the clock signals from the base oscillator are called the oscillator clock, and those from
the PLL oscillator are called the PLL clock.
(1) Register List
Clock select register (CKSCR)
0000A1H
15
14
13
12
11
10
9
8
SCM MCM WS1 WS0 SCS MCS CS1 CS0
R
R
R/W R/W R/W R/W R/W R/W
1
1
1
1
1
1
0
0
Read/write
Initial value
PLL output select register (PLLOS)
15
14
13
12
11
10
9
8
0000CFH
⎯
⎯
⎯
⎯
⎯
⎯
⎯ PLL2
⎯
⎯
⎯
⎯
⎯
⎯
W
W ^Read/write
⎯
⎯
⎯
⎯
⎯
⎯
X
0 Initial value
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DS07-13722-11E