Datasheet

R01DS0190EJ0100 Rev.1.00 Page 67 of 107
Jun 19, 2013
RX111 Group 5. Electrical Characteristics
Note 1. Time until the clock can be used after the main clock oscillator stop bit (MOSCCR.MOSTP) is set to 0 (operating) when the
external clock is stable.
Note 2. Reference values when an 8-MHz oscillator is used.
When specifying the main clock oscillator stabilization time, set the MOSCWTCR register with a stabilization time value that is
equal to or greater than the oscillator-manufacturer-recommended value.
After changing the setting of the MOSCCR.MOSTP bit so that the main clock oscillator operates, read the OSCOVFSR.MOOVF
flag to confirm that is has become 1, and then start using the main clock.
Note 3. The VCC range that the PLL can be used is 2.4 to 3.6 V.
Note 4. After changing the setting of the SOSCCR.SOSTP bit or RCR3.RTCEN bit so that the sub-clock oscillator operates, only start
using the sub-clock after the sub-clock oscillation stabilization time with an adequate margin (2 times is recommended) has
elapsed.
Figure 5.18 XTAL External Clock Input Timing
Table 5.22 Clock Timing
Conditions: VCC = AVCC0 = VCC_USB = 1.8 to 3.6 V, VSS = AVSS0 = VREFL0 = VSS_USB = 0 V, T
a
= –40 to +105°C
Item Symbol Min. Typ. Max. Unit Test Conditions
XTAL external clock input cycle time
t
Xcyc
50 — — ns
Figure 5.18
XTAL external clock input high pulse width
t
XH
20 — — ns
XTAL external clock input low pulse width
t
XL
20 — — ns
XTAL external clock rising time
t
Xr
—— 5ns
XTAL external clock falling time
t
Xf
—— 5ns
XTAL external clock input wait time*
1
t
EXWT
0.5 — — µs
Main clock oscillator oscillation frequency*
2
2.4 ≤ VCC ≤ 3.6
f
MAIN
1—20MHz
1.8 ≤ VCC < 2.4
1—8
Main clock oscillation stabilization time (crystal)*
2
t
MAINOSC
—3—ms
Figure 5.20
Main clock oscillation stabilization time (ceramic resonator)*
2
t
MAINOSC
—50 µs
LOCO clock oscillation frequency
f
LOCO
3.44 4.0 4.56 MHz
LOCO clock oscillation stabilization time
t
LOCO
——0.5µs
Figure 5.21
IWDT-dedicated clock oscillation frequency
f
ILOCO
12.75 15 17.25 kHz
IWDT-dedicated clock oscillation stabilization time
t
ILOCO
——50μs
Figure 5.19
HOCO clock oscillation frequency
f
HOCO
31.52 32 32.48 MHz
Ta = –40 to 85°C
31.68 32 32.32
Ta = –20 to 85°C
31.36 32 32.64
Ta = –40 to 105°C
HOCO clock oscillation stabilization time
t
HOCO2
——56µs
Figure 5.23
PLL input frequency*
3
f
PLLIN
4—8MHz
PLL circuit oscillation frequency*
3
f
PLL
32 — 48 MHz
PLL clock oscillation stabilization time
t
PLL
——50µs
Figure 5.24
Sub-clock oscillator oscillation frequency
f
SUB
— 32.768 — kHz
Sub-clock oscillation stabilization time*
4
t
SUBOSC
—0.5—s
Figure 5.25
t
EXH
t
EXcyc
XTAL external clock input
VCC × 0.5
t
EXL
t
EXr
t
EXf