RX71M_15 Datasheet, PDF (150/228 Pages) Renesas Technology Corp – Renesas MCUs

RX71M Group
5. Electrical Characteristics
Table 5.12 EXTAL Clock Timing
Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = V_BATT = 2.7 to 3.6 V, 2.7 ≤ VREFH0 ≤ AVCC0,
VCC_USBA = AVCC_USBA = 3.0 to 3.6 V,
VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = VSS1_USBA = VSS2_USBA = PVSS_USBA = AVSS_USBA = 0 V,
T_a = T_opr
Item
EXTAL external clock input cycle time
EXTAL external clock input high pulse width
EXTAL external clock input low pulse width
EXTAL external clock rising time
EXTAL external clock falling time
Symbol
t_EXcyc
t_EXH
t_EXL
t_EXr
t_EXf
Min.
Typ.
41.66
—
15.83
—
15.83
—
—
—
—
—
Max.
—
—
—
5
5
Unit
Test
Conditions
ns Figure 5.4
ns
ns
ns
ns
t_EXH
t_EXcyc
t_EXL
EXTAL external clock input
t_EXr
t_EXf
Figure 5.4 EXTAL External Clock Input Timing
VCC × 0.5
Table 5.13 Main Clock Timing
Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = V_BATT = 2.7 to 3.6 V, 2.7 ≤ VREFH0 ≤ AVCC0,
VCC_USBA = AVCC_USBA = 3.0 to 3.6 V,
VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = VSS1_USBA = VSS2_USBA = PVSS_USBA = AVSS_USBA = 0 V,
T_a = T_opr
Item
Symbol
Min.
Typ.
Max.
Unit
Test
Conditions
Main clock oscillation frequency
Main clock oscillator stabilization time (crystal)
Main clock oscillation stabilization wait time (crystal)
f_MAIN
8
t_MAINOSC
—
t_MAINOSCWT
—
—
24
MHz
—
—*¹
ms Figure 5.5
—
—*²
ms
Note 1.
Note 2.
When using a main clock, ask the manufacturer of the oscillator to evaluate its oscillation. Refer to the results of evaluation
provided by the manufacturer for the oscillation stabilization time.
The number of cycles selected by the value of the MOSCWTCR.MSTS[7:0] bits determines the main-clock oscillation
stabilization wait time in accord with the formula below.
t_MAINOSCWT = [(MSTS[7:0] bits × 32) + 10] / f_LOCO
MOSCCR.MOSTP
Main clock oscillator output
OSCOVFSR.MOOVF
t_MAINOSC
t_MAINOSCWT
Main clock
Figure 5.5 Main Clock Oscillation Start Timing
R01DS0249EJ0100 Rev.1.00
Jan 15, 2015
Page 150 of 228