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Chapter 1 Overview
I - 20
Electrical Characteristics
*1 The clock duty rate should be 45% to 55%.
Certain operating conditions differ between the mask ROM version and the Flash version.
Refer to chapter 18 Flash EEPROM for electrical characteristics of the Flash version.
T
a
=-40
o
C to +85
o
C
V
DD
=1.8 V to 3.6 V V
SS
=0 V
External clock input 1 OSC1 (OSC2 is opened)
18
19
20
21
22
External clock input 2 XI (XO is opened)
23
24
25 3.5
26
27
Parameter Symbol Conditions Unit
MIN TYP MAX
Rating
Clock frequency f
osc
1.0 20.0
High level pulse width
Low level pulse width
Rising time
Falling time
t
wh1
t
wl1
t
wr1
t
wf1
Clock frequency
High level pulse width
Low level pulse width
Rising time
f
x
t
wh2
t
wl2
t
wr2
*1 Figure 1-5-3
Figure 1-5-3
*1 Figure 1-5-4
Figure 1-5-4
MHz
kHz
20
32.768
5.0
ns
µ
s
Falling time t
wf2
20
20.0
20.0
ns
3.5
5.0