UPD78F1502AGK-GAK-AX Datasheet, PDF (896/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 31 ELECTRICAL SPECIFICATIONS
X1 Oscillator Characteristics
(TA = −40 to +85°C, 1.8 V ≤ VDD = EVDD ≤ 5.5 V, VSS = EVSS = AVSS = 0 V)
Resonator
Recommended
Circuit
Parameter
Conditions
Ceramic resonator,
crystal resonator
VSS X1 X2
X1 clock oscillation
frequency (fX)^Note
2.7 V ≤ VDD ≤ 5.5 V
1.8 V ≤ VDD < 2.7 V
C1 C2
MIN. TYP. MAX. Unit
2.0
20.0 MHz
2.0
5.0
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the X1 oscillator, wire as follows in the area enclosed by the broken lines in the above
figures 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 VSS.
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
2. Since the CPU is started by the internal high-speed oscillation clock after a reset release, check
the X1 clock oscillation stabilization time using the oscillation stabilization time counter status
register (OSTC) by the user. Determine the oscillation stabilization time of the OSTC register and
oscillation stabilization time select register (OSTS) after sufficiently evaluating the oscillation
stabilization time with the resonator to be used.
Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the oscillation
themselves or apply to the resonator manufacturer for evaluation.
Internal Oscillator Characteristics
(TA = −40 to +85°C, 1.8 V ≤ VDD = EVDD ≤ 5.5 V, VSS = EVSS = AVSS = 0 V)
Oscillators
Parameters
Conditions
Internal high-
fIH1M
speed oscillation _fIH8M
clock frequency
Note
fIH20M
Internal low-speed fIL
oscillation clock
frequency
Low-power consumption mode
2.7 V ≤ VDD ≤ 5.5 V
1.8 V ≤ VDD < 2.7 V, TA = −20 to +70°C
1.8 V ≤ VDD < 2.7 V
2.7 V ≤ VDD ≤ 5.5 V
Normal power mode
2.7 V ≤ VDD ≤ 5.5 V
1.8 V ≤ VDD < 2.7 V
Low-power consumption mode
MIN.
0.87
7.856
7.848
7.84
19.52
27
25.5
25.5
TYP.
1
8
8
8
20
30
30
30
MAX.
1.13
8.144
8.152
8.16
20.48
33
34.5
34.5
Unit
MHz
MHz
MHz
MHz
MHz
kHz
kHz
kHz
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
R01UH0004EJ0501 Rev.5.01
880
Jun 20, 2011