m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 101

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

R
R
M
e
E
3
. v
J
Figure 8.12 External Circuit with PLL Frequency Synthesizer
Table 8.2 Bit Settings to Use PLL Clock as CPU Clock Source
Figure 8.13 Procedure to Use PLL Clock as CPU Clock Source
2
10MHz
8MHz
0
f(X
1
C
9
3 .
B
8 /
IN
0
1
3
0
)
3
J
G
4
a
0 -
o r
n
Microcomputer
3 .
1
u
3
, 1
C1=220pF, C2=0.1 µF, R1=1 k
p
V
1
PLC02
CONT
(
2
P8
V
M
0
0
1
SS
0
3
6
6
2
C
Use PLL clock as CPU clock source
8 /
Page 78
(PLL clock as CPU clock source)
, 3
PLC0 Register
(PLL clock division enabled)
Set the PLC02 to PLC00 bits
M
Set the PLC11 bit to "1"
Set the PLC07 bit to "1"
Set the CM17 bit to "1"
PLC01
C1
3
and the PLC12 bit
1
0
2
Wait 20 to 50ms
R1
C
f o
8 /
(PLL on)
4
3
End
8
) T
8
(2)
PLC00
C2
1
0
NOTES:
1. Connect V
2. Optimal values of the low pass filter circuit element,
wiring. Ground pattern must be formed around the circuit.
connected to the V
(e.g.noise). Evaluate not only with these optimal values, but
also with other values, to determine the values most
appropriate for your system.
Use capacitors for temperature compensation.
PLC1 Register
PLC12
SS
0
1
0
1
PLC11 and PLC12 bits : Bit in PLC1 register
PLC00 to PLC02 bits, PLC07 bit : Bits in PLC0 register
CM17 bit : Bit in CM1 register
to GND via C1 and C2 with shortest possible
CONT
PLL Clock
pin, varies with environment
30 MHz
20 MHz
21.3MHz
32MHz
8. Clock Generation Circuit