RX220_15 Datasheet, PDF (67/107 Pages) Renesas Technology Corp – Renesas MCUs

RX220 Group
5. Electrical Characteristics
5.3.1
Clock Timing
Table 5.22 Clock Timing
Conditions: VCC = AVCC0 = 1.62 to 5.5 V, VSS = AVSS0 = VREFL0 = 0 V, T_a = –40 to +105°C
Item
Symbol
Min. Typ. Max.
EXTAL external clock input cycle time
t_EXcyc
50
—
—
EXTAL external clock input high pulse width
t_EXH
20
—
—
EXTAL external clock input low pulse width
t_EXL
20
—
—
EXTAL external clock rising time
t_EXr
—
—
5
EXTAL external clock falling time
t_EXf
—
—
5
EXTAL external clock input wait time*¹
t_EXWT
1
—
—
Main clock oscillator oscillation frequency*²
f_MAIN
1
—
20
Main clock oscillation stabilization time (crystal)*²
t_MAINOSC
—
3
—
Main clock oscillation stabilization time (ceramic resonator)*²
t_MAINOSC
—
50
—
Main clock oscillation stabilization wait time (crystal)*²
t_MAINOSCWT
—
6
—
Main clock oscillation stabilization wait time (ceramic
resonator)*²
t_MAINOSCWT
—
100
—
LOCO clock cycle time
t_cyc
7.27
8
8.89
LOCO clock oscillation frequency
f_LOCO
112.5 125 137.5
LOCO clock oscillation stabilization wait time
t_LOCOWT
—
—
20
HOCO clock oscillation frequency
f_HOCO
31.680 32 32.320
36.495 36.864 37.233
39.600 40 40.400
49.500 50 50.500
31.520 32 32.480
36.311 36.864 37.417
39.400 40 40.600
49.250 50 50.750
HOCO clock oscillation stabilization time 1
t_HOCO1
—
—
50
HOCO clock oscillation stabilization time 2
t_HOCO2
—
—
10
HOCO clock oscillation stabilization wait time
t_HOCOWT
—
—
20
HOCO clock power supply stabilization time
t_HOCOP
—
—
350
Sub-clock oscillator oscillation frequency
f_SUB
— 32.768 —
Sub-clock oscillation stabilization time*³
t_SUBOSC
2
—
—
Sub-clock oscillation stabilization wait time*³
t_SUBOSCWT
4
—
—
Unit
ns
ns
ns
ns
ns
ms
MHz
ms
µs
ms
µs
µs
kHz
µs
MHz
µs
µs
µs
µs
kHz
s
s
Test Conditions
Figure 5.21
Figure 5.22
Figure 5.23
T_a = 0 to 50°C
T_a = -40 to 105°C
Figure 5.24
Figure 5.25
Figure 5.25
Figure 5.26
Figure 5.27
Note 1. The time interval from the time P36 and P37 are configured for input and the main clock oscillator stopping bit
(MOSCCR.MOSTP) is set to 0 (operating) until the clock becomes available.
Note 2. When specifying the main clock oscillator stabilization time, load MOSCWTCR register with a stabilization time value that is
greater than the resonator-vendor-recommended value. When determining the main lock oscillation stabilization wait time, allow
an adequate margin (2 times is recommended) for the main clock oscillation stabilization time.
Start using the main clock in the main clock oscillation stabilization wait time (tMAINOSCWT) after setting up the main clock
oscillator for operation with the MOSCCR.MOSTP bit.
The indicated value is a reference value that is measured for an 8 MHz resonator.
Note 3. When specifying the sub-clock oscillation stabilization time, load SOSCWTCR register with the resonator-vendor-recommended
stabilization time value minus 2 seconds. When determining the sub-clock oscillation stabilization wait time, allow an adequate
margin (2 times is recommended) for the sub-clock oscillation stabilization time. Start using the sub-clock in the sub-clock
oscillation stabilization wait time (tSUBOSCWT) after setting up the sub-clock oscillator for operation with the SOSCCR.SOSTP
or RCR3.RTCEN bit.
R01DS0130EJ0110 Rev.1.10
Dec 20, 2013
Page 67 of 105