Renesas M16C/6NK Technical Information Seite 87

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Rev.2.10 Apr 14, 2006 page 63 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 8. Clock Generation Circuit
Figure 8.8 PLC0 Register
PLC07
Function
PLL Control Register 0
(1)
Operation enable bit
(3)
0 : PLL Off
1 : PLL On
Bit NameBit Symbol
Symbol Address After Reset
PLC0 001Ch 0001X010b
RW
PLC00
b2 b1 b0
0 0 0 : Do not set a value
0 0 1 : Multiply-by-2
0 1 0 : Multiply-by-4
0 1 1 : Multiply-by-6
(4)
1 0 0 :
1 0 1 :
Do not set a value
1 1 0 :
1 1 1 :
PLC01
PLC02
-
(b3)
-
(b4)
-
(b6-b5)
Reserved bit Set to 1
Reserved bits Set to 0
PLL multiplying factor
select bits
(2)
RW
RW
RW
-
RW
RW
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined.
NOTES:
1. Rewrite this register after setting the PRC0 bit in the PRCR register to 1 (write enabled).
2. This bit can only be modified when the PLC07 bit = 0 (PLL turned off). The value once written to this bit
cannot be modified.
3. Before setting this bit to 1, set the CM07 bit in the CM0 register to 0 (main clock), set bits CM17 to CM16
in the CM1 register to 00b (main clock undivided mode), and set the CM06 bit in the CM0 register to 0
(bits CM16 and CM17 enabled).
4. Multiply by 6 is available Normal-ver. only.
b7 b6 b5 b4 b3 b2 b1 b0
0 10
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