HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 347

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

10.6
When Using an External Crystal Oscillator: Place the crystal oscillator, capacitors CL1 and
CL2, close to the EXTAL and XTAL pins. To prevent induction from interfering with correct
oscillation, use a common grounding point for the capacitors connected to the oscillator, and do
not locate a wiring pattern near these components.
Decoupling Capacitors: As far as possible, insert a laminated ceramic capacitor of 0.1 to 1 µF as
a passive capacitor for each V
SH7706 power supply pins, and use components with a frequency characteristic suitable for the
chip's operating frequency, as well as a suitable capacitance value.
Digital system V
to 95, 115 to 117, 137 to 139, 148 to 150, 156 to 158
On-chip oscillator V
When Using a PLL Oscillator Circuit: Keep the wiring from the PLL V
pattern to the power supply pins short, and make the pattern width large, to minimize the
inductance component. Ground the oscillation stabilization capacitors C1 and C2 to V
and V
locate a wiring pattern in the vicinity. In clock mode 7, connect the EXTAL pin to V
and leave the XTAL pin open.
SS
(PLL2), respectively. Place C1 and C2 close to the CAP1 and CAP2 pins and do not
Usage Note
Figure 10.2 Points for Attention when Using Crystal Oscillator
SS
/V
SS
CC
/V
Note:
pairs: 11 to 13, 19 to 21, 25 to 27, 37 to 39, 49 to 51, 61 to 63, 84 to 86, 93
CC
pairs: 1 to 4, 123 to 125, 126 to 128
SS
The values for CL1, and CL2 should be determined after
consultation with the crystal oscillator manufacturer.
/V
CC
pair. Mount the passive capacitors as close as possible to the
Avoid crossing
signal lines
EXTAL
CL1
This LSI
CL2
XTAL
Rev. 4.00, 03/04, page 301 of 660
CC
and V
SS
CC
connection
SS
Q or V
(PLL1)
SS