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Chapter 1 Overview
15
Electrical Characteristics
∗
1
Set the clock duty ratio to 45 to 55%.
*2 Applicable only for 48-pin QFH package
Parameter Symbol Conditions
Rating
Unit
MIN TYP MAX
External clock input 1 OSC1 (OSC2 is unconnected)
18 Clock frequency f
OSC
1.0 20.0 MHz
19 High level pulse width
∗
twh 1
∗1
20.0 30.0
ns
20 Low level pulse width
∗
twl 1 20.0 30.0
21 Rise time twr 1 5.0
ns
22 Fall time twf 1 5.0
External clock input 2 XI (XO is unconnected)*2
23 Clock frequency fx 32.768 100 kHz
24 High level pulse width
∗
twh 2
∗1
3.5
µs
25 Low level pulse width
∗
twl 2 3.5
26 Rise time twr 2 20
ns
27 Fall time twf 2 20
Fig. 1-5-3
Fig. 1-5-3
Fig. 1-5-4
Fig. 1-5-4