RX110 datasheet(64/108 Pages) RENESAS

64 / 108 page

R01DS0202EJ0120 Rev.1.20

Page 64 of 108

Jul 29, 2016

RX110 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. 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.

Figure 5.18

XTAL External Clock Input Timing

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.

Unit

Test Conditions

XTAL external clock input cycle time

tXcyc

——

Figure 5.18

XTAL external clock input high pulse width

tXH

——

XTAL external clock input low pulse width

tXL

——

XTAL external clock rising time

tXr

——

5ns

XTAL external clock falling time

tXf

——

5ns

XTAL external clock input wait time*1

tEXWT

0.5

——

µs

Main clock oscillator oscillation frequency

2.4

≤ VCC ≤ 3.6

fMAIN

—

MHz

1.8

≤ VCC < 2.4

—

Main clock oscillation stabilization time (crystal)*2

tMAINOSC

—

3—

Figure 5.20

Main clock oscillation stabilization time (ceramic resonator)*2

tMAINOSC

—

µs

LOCO clock oscillation frequency

fLOCO

3.44

4.0

4.56

MHz

LOCO clock oscillation stabilization time

tLOCO

——

0.5

µs

Figure 5.21

IWDT-dedicated clock oscillation frequency

fILOCO

12.75

17.25

kHz

IWDT-dedicated clock oscillation stabilization time

tILOCO

——

μs

Figure 5.19

HOCO clock oscillation frequency

fHOCO

31.52

32.48

MHz

Ta = –40 to 85°C

31.68

32.32

Ta = –20 to 85°C

31.36

32.64

Ta = –40 to 105°C

HOCO clock oscillation stabilization time

tHOCO2

——

µs

Figure 5.23

Sub-clock oscillator oscillation frequency*4

fSUB

—

32.768

—

kHz

Sub-clock oscillation stabilization time*3

tSUBOSC

—0.5

—

Figure 5.24

tEXH

tEXcyc

XTAL external clock input

VCC × 0.5

tEXL

tEXr

tEXf

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