Renesas RX100 Series User Manual page 999

RX13T Group
Table 32.21 Clock Timing
Conditions: VCC = 2.7 V to 5.5 V, AVCC0 = VCC to 5.5 V, VSS = AVSS0 = 0 V, T
Item
EXTAL external clock input cycle time
EXTAL external clock input high pulse width
EXTAL external clock input low pulse width
EXTAL external clock rise time
EXTAL external clock fall time
EXTAL external clock input wait time
Main clock oscillator oscillation frequency
Main clock oscillation stabilization time (crystal)
Main clock oscillation stabilization time (ceramic
resonator) 2
*
LOCO clock oscillation frequency
LOCO clock oscillation stabilization time
IWDT-dedicated clock oscillation frequency
IWDT-dedicated clock oscillation stabilization time
HOCO clock oscillation frequency
HOCO clock oscillation stabilization time
PLL circuit oscillation frequency
PLL clock oscillation stabilization time
PLL free-running oscillation frequency
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 resonator 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 resonator-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.
EXTAL external clock input
Figure 32.4 EXTAL External Clock Input Timing
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
Symbol
t
Xcyc
t
XH
t
XL
t
Xr
t
Xf
1 t
*
EXWT
2 f
*
MAIN
2 t
*
MAINOSC
t
MAINOSC
f
LOCO
t
LOCO
f
ILOCO
t
ILOCO
f
HOCO
t
HOCO
f
PLL
t
PLL
f
PLLFR
t
Xr
= –40 to +105°C
a
Min. Typ. Max.
50 — —
20 — —
20 — —
— — 5
— — 5
0.5 — —
1 — 20
— 3 —
— 50 —
3.44 4.0 4.56
— — 0.5
12.75 15 17.25
— — 50
31.52 32 32.48
31.68 32 32.32
31.36 32 32.64
— — 41.3
24 — 32
— — 74.4
— 8 —
t
Xcyc
t t
XH XL
t
Xf
32. Electrical Characteristics
Unit Test Conditions
ns Figure 32.4
ns
ns
ns
ns
μs
MHz
ms Figure 32.5
μs
MHz
μs Figure 32.6
kHz
μs Figure 32.7
MHz T = –40 to +85°C
a
T = –20 to +85°C
a
T = –40 to +105°C
a
μs Figure 32.9
MHz
μs Figure 32.10
MHz
VCC × 0.5
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