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Chapter 6
Clock Generator
User’s Manual U16702EE3V2UD00
(5)
CPU operation clock status register (CCLS)
Status flags that indicate the operation status of the CPU operating clock.
This register can be read in 8-bit or 1-bit units.
Figure 6-6:
CPU Operation Clock Status Register (CCLS) Format
(6)
Ring-OSC mode register (RCM)
This is an 8-bit register that sets the operation mode of the ring oscillator (Ring-OSC).
This register can be read or written in 8-bit or 1-bit units.
RESET input clears this register to 00H.
Figure 6-7:
Ring-OSC Mode Register (RCM) Format
Symbol
7
6
5
4
3
2
1
0
Address
After reset
CCLS
0
0
0
0
0
0
0
CCLSF
FFFFF82EH
00H
R/W
R
R
R
R
R
R
R
R
CCLSF
Status of operating clock
0
Operating with main system clock (f
X
)
1
Operating with ring OSC (f
R
)
Symbol
7
6
5
4
3
2
1
0
Address
After reset
RCM
0
0
0
0
0
0
0
RSTOP FFFFF80CH
00H
R/W
R
R
R
R
R
R
R
R/W
RSTOP
Ring-OSC operation select
0
Ring-OSC Operate
1
Ring-OSC Stop
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