Datasheet
V850ES/JG3-H, V850ES/JH3-H CHAPTER 33 ELECTRICAL SPECIFICATIONS
R01UH0042EJ0500 Rev.5.00 Page 1414 of 1513
Aug 12, 2011
The oscillation voltage and oscillation frequency indicate only oscillator characteristics. Use the
V850ES/Jx3-H so that the internal operating conditions are within the specifications of the DC and AC
characteristics.
Remark Figures in parentheses in columns C1 and C2 indicate the capacitance incorporated in the resonator.
33.4.2 Subclock oscillator characteristics
(T
A = −40 to +85°C, VDD = EVDD = UVDD = AVREF0 = AVREF1, VSS = AVSS = 0 V, CL = 50 pF)
Resonator Circuit Example Parameter Conditions MIN. TYP. MAX. Unit
Oscillation frequency
(f
XT)
Note 1
32 32.768 35 kHz
Crystal
resonator
XT2XT1
Oscillation stabilization
time
Note 2
10 s
Notes 1. The oscillation frequency shown above indicates only oscillator characteristics. Use the V850ES/JG3-H and
V850ES/JH3-H so that the internal operation conditions do not exceed the ratings shown in AC
Characteristics and DC Characteristics.
2. Time required from when V
DD reaches the oscillation voltage range (2.85 V (MIN.)) to when the crystal resonator
stabilizes.
Cautions 1. When using the subclock oscillator, wire as follows in the area enclosed by the broken lines in the
above figure to avoid an adverse effect from wiring capacitance.
• 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 current flows.
• Always make the ground point of the oscillator capacitor the same potential as V
SS.
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
2. The subclock oscillator is designed as a low-amplitude circuit for reducing power consumption, and
is more prone to malfunction due to noise than the main clock oscillator. Particular care is therefore
required with the wiring method when the subclock is used.
3. For the resonator selection and oscillator constant, customers are requested to either evaluate the
oscillation themselves or apply to the resonator manufacturer for evaluation.