Datasheet

RL78/G13 3. ELECTRICAL SPECIFICATIONS (G: T
A = -40 to +105°C)
Page 126 of 194R01DS0131EJ0310 Rev.3.10
Nov 15, 2013
3.2 Oscillator Characteristics
3.2.1 X1, XT1 oscillator characteristics
(T
A = −40 to +105°C, 2.4 V ≤ VDD ≤ 5.5 V, VSS = 0 V)
Parameter Resonator Conditions MIN. TYP. MAX. Unit
X1 clock oscillation
frequency (f
X)
Note
Ceramic resonator/
crystal resonator
2.7 V ≤ V
DD ≤ 5.5 V 1.0 20.0 MHz
2.4 V ≤ VDD < 2.7 V 1.0 16.0 MHz
XT1 clock oscillation
frequency (f
X)
Note
Crystal resonator 32 32.768 35 kHz
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 5.4 System Clock Oscillator.
3.2.2 On-chip oscillator characteristics
(T
A = −40 to +105°C, 2.4 V ≤ VDD ≤ 5.5 V, VSS = 0 V)
Oscillators Parameters Conditions MIN. TYP. MAX. Unit
High-speed on-chip oscillator
clock frequency
Notes 1, 2
f
IH 1 32 MHz
High-speed on-chip oscillator
clock frequency accuracy
−20 to +85 °C 2.4 V ≤ VDD ≤ 5.5 V −1.0 +1.0 %
−40 to −20 °C 2.4 V ≤ VDD ≤ 5.5 V −1.5 +1.5 %
+85 to +105 °C 2.4 V ≤ VDD ≤ 5.5 V −2.0 +2.0 %
Low-speed on-chip oscillator
clock frequency
fIL 15 kHz
Low-speed on-chip oscillator
clock frequency accuracy
−15 +15 %
Notes 1. High-speed on-chip oscillator frequency is selected by bits 0 to 3 of option byte (000C2H/010C2H) and
bits 0 to 2 of HOCODIV register.
2. This indicates the oscillator characteristics only. Refer to AC Characteristics for instruction execution
time.