HD6432621 Hitachi, HD6432621 Datasheet - Page 17

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

Section
20.1.1 Block Diagram
Figure 20-1 Block
Diagram of Clock Pulse
Generator
20.3.1 Connecting a
Crystal Resonator
Table 20-2 Damping
Resistance Value
Table 20-3 Crystal
Resonator Parameters
Figure 20-5 Points for
Attention when Using
PLL Oscillation Circuit
20.3.2 External Clock
Input
Table 20-4 External
Clock Input Conditions
Page
676
679
680
681
683
Description
Figure replaced
4th line changed as follows
Separate PLLV
the board power supply source, and be sure to insert bypass capacitors CPB
and CB close to the pins.
Vcc = 3.0 V to 3.6 V and PVcc = 3.0 V to 5.5 V portions deleted
Frequency (MHz)
R
Frequency (MHz)
R
C
OSC1
OSC2
Legend:
LPWRCR:
SCKCR:
Note: * Supported only in the H8S/2626 Series, not available in the H8S/2623 Series.
Note: * CB and CPB are laminated ceramic capacitors.
d
S
0
( )
max (pF)
max ( )
Low-power control register
System clock control register
oscillator*
PVCC1 to PVCC4
Subclock
CC
and PLLV
PLLCAP
PLLVCC
PLLVSS
VCC
VSS
4
500
4
120
7
CPB: 0.1 F *
CB: 1000pF *
R1: 3 k
SS
Waveform
shaping
circuit*
from the other V
8
200
8
80
7
Rp: 200
WDT1 count clock
CB: 300pF *
ø SUB
C1: 470 pF
12
0
12
60
7
(Values are preliminary recommended values.)
CC
selection
16
0
16
50
7
/V
circuit
Clock
SS
and PV
20
0
20
40
7
CC
/PV
SS
lines at