Chapter 1 Overview
15
Electrical Characteristics
1Set 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 fOSC 1.0 20.0 MHz
19 High level pulse widthtwh 1 120.0 30.0 ns
20 Low level pulse widthtwl 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 widthtwh 2 13.5 µs
25 Low level pulse widthtwl 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