RX110_16 Datasheet, PDF (64/108 Pages) Renesas Technology Corp – 32 MHz 32-bit RX MCUs, 50 DMIPS

RX110 Group
5. Electrical Characteristics
Table 5.22 Clock Timing
Conditions: 1.8 V ≤ VCC ≤ 3.6 V, 1.8 V ≤ AVCC0 ≤ 3.6 V, VSS = AVSS0 = 0 V, T_a = –40 to +105°C
Item
Symbol Min. Typ. Max.
XTAL external clock input cycle time
t_Xcyc
50
—
—
XTAL external clock input high pulse width
t_XH
20
—
—
XTAL external clock input low pulse width
t_XL
20
—
—
XTAL external clock rising time
t_Xr
—
—
5
XTAL external clock falling time
t_Xf
—
—
5
XTAL external clock input wait time*¹
t_EXWT
0.5
—
—
Main clock oscillator oscillation frequency
2.4 ≤ VCC ≤ 3.6
f_MAIN
1
—
20
1.8 ≤ VCC < 2.4
1
—
8
Main clock oscillation stabilization time (crystal)*²
t_MAINOSC
—
3
—
Main clock oscillation stabilization time (ceramic resonator)*²
t_MAINOSC
—
50
LOCO clock oscillation frequency
f_LOCO
3.44
4.0
4.56
LOCO clock oscillation stabilization time
t_LOCO
—
—
0.5
IWDT-dedicated clock oscillation frequency
f_ILOCO 12.75
15
17.25
IWDT-dedicated clock oscillation stabilization time
t_ILOCO
—
—
50
HOCO clock oscillation frequency
f_HOCO 31.52
32
32.48
31.68 32 32.32
31.36 32 32.64
HOCO clock oscillation stabilization time
Sub-clock oscillator oscillation frequency*⁴
t_HOCO2
f_SUB
—
—
56
— 32.768 —
Sub-clock oscillation stabilization time*³
t_SUBOSC
—
0.5
—
Unit Test Conditions
ns Figure 5.18
ns
ns
ns
ns
µs
MHz
ms Figure 5.20
µs
MHz
µs Figure 5.21
kHz
μs Figure 5.19
MHz T_a = –40 to 85°C
T_a = –20 to 85°C
T_a = –40 to 105°C
µs Figure 5.23
kHz
s Figure 5.24
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. 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 wait time that is equal to or greater than the oscillator-
manufacturer-recommended value has elapsed.
Reference value when a 32.768-kHz resonator is used.
Note 4. Only 32.768 kHz can be used.
t_EXH
t_EXcyc
t_EXL
XTAL external clock input
t_EXr
t_EXf
Figure 5.18 XTAL External Clock Input Timing
VCC × 0.5
R01DS0202EJ0120 Rev.1.20
Jul 29, 2016
Page 64 of 108