HD6432621 Hitachi, HD6432621 Datasheet - Page 725

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

External circuitry such as that shown below is recommended around the PLL.
Place oscillation stabilization capacitor C1 and resistor R1 close to the PLLCAP pin, and ensure
that no other signal lines cross this line. Supply the C1 ground from PLLVSS.
Separate PLLV
supply source, and be sure to insert bypass capacitors CPB and CB close to the pins.
Note: * CB and CPB are laminated ceramic capacitors.
Figure 20-5 Points for Attention when Using PLL Oscillation Circuit
CC
PVCC1 to PVCC4
and PLLV
PLLVCC
PLLCAP
PLLVSS
VCC
VSS
SS
from the other V
CPB: 0.1 F *
CB: 1000pF *
R1: 3 k
Rp: 200
CC
/V
CB: 300pF *
SS
C1: 470 pF
and PV
(Values are preliminary recommended values.)
CC
/PV
SS
lines at the board power
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