RL78/G1H CHAPTER 31 ELECTRICAL SPECIFICATIONS
R01UH0575EJ0120 Rev. 1.20 Page 859 of 920
Dec 22, 2016
31.2 Oscillator Characteristics
31.2.1 X1, XT1 characteristics
Note Indicates only permissible oscillator frequency ranges. Refer to AC Characteristics for instruction execution time.
Request evaluation by the manufacturer of the oscillator circuit mounted on a board to check the oscillator
characteristics.
Caution Since the CPU is started by the high-speed on-chip oscillator 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 the oscillation stabilization time select
register (OSTS) after sufficiently evaluating the oscillation stabilization time with the resonator to be used.
Remark When using the X1 oscillator and XT1 oscillator, refer to 6.4 System Clock Oscillator.
31.2.2 On-chip oscillator characteristics
Note 1. High-speed on-chip oscillator frequency is selected with bits 0 to 4 of the option byte (000C2H/010C2H) and bits 0 to 2 of
the HOCODIV register.
Note 2. This only indicates the oscillator characteristics. Refer to AC Characteristics for instruction execution time.
(TA = ‒40 to +85 °C, 1.8 V ≤ VDD ≤ 3.6 V, VSS = 0 V)
Resonator Resonator Conditions MIN. TYP. MAX. Unit
X1 clock oscillation frequency (f
X)
Note
Ceramic resonator/
crystal resonator
2.7 V ≤
VDD ≤ 3.6 V
1.0 20.0 MHz
2.4 V ≤
VDD < 2.7 V
1.0 16.0
1.8 V ≤
VDD < 2.4 V
1.0 8.0
XT1 clock oscillation frequency (f
XT)
Note
Crystal resonator 32 32.768 35 kHz
(TA = ‒40 to +85 °C, 1.8 V ≤ VDD ≤ 3.6 V, VSS = 0 V)
Oscillators Parameters Conditions MIN. TYP. MAX. Unit
High-speed on-chip oscillator clock frequency
Notes 1, 2
fIH 132MHz
High-speed on-chip oscillator clock frequency
accuracy
‒20 to +85 °C 1.8 V ≤ V
DD ≤ 3.6 V ‒1.0 +1.0 %
‒40 to ‒20 °C 1.8 V ≤ V
DD ≤ 3.6 V ‒1.5 +1.5 %
Low-speed on-chip oscillator clock frequency f
IL 15 kHz
Low-speed on-chip oscillator clock frequency
accuracy
‒15 +15 %
To Next Page
Loading...
Need help?
General
