PD70F3461_15 Datasheet, PDF (17/63 Pages) Renesas Technology Corp – V850E/CAG4-M 32-Bit Single-Chip Microcontroller

µPD70F3461
2.2 Sub-Oscillator Characteristics
Ta =-40 to +105°C
V_DD5X = 4.5 to 5.5V
V_DD3x = AV_DD = BV_DD3x = MV_DD3x = 3.0 to 3.6V
V_SS5X = V_SS3x = AV_SS = BV_SS5X = BV_SS3X = MV_SS3X = 0V
XT1
XT2
R_S
C_S1
C_S2
Figure 2-2: Sub-Oscillator Recommendations
Remark: Values of capacitors C_S1, C_S2 and Resistor R_S depend on used crystal and must be speci-
fied in cooperation with the manufacturer.
Cautions: 1.
2.
External clock input is prohibited.
Wire as follows in the area enclosed by the broken lines in the above figure to
avoid an adverse effect from wiring capacitance.
• Place the oscillation circuit as close as possible to X1 and X2 pins.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines.
• Do not route the wiring near a signal line through which a high fluctuating cur-
rent flows.
• Always make the ground point of the oscillator capacitor the same potential as
CVSS.
• Do not ground the capacitor to a ground pattern through which a high current
flows.
• Do not fetch signals from the oscillator.
Parameter
Oscillation frequency
Table 2-2: Sub-Oscillator Operating Conditions
Symbol
fSOSC
Conditions
MIN. TYP. MAX. Unit
32.500 32.768 33.000 KHz
Note: Please specify the oscillation stabilization time for the sub-oscillator TSOST with the manufac-
turer of the external quartz crystal.
17
Datasheet U18578EE1V0DS00