LC87FBH08A_16 Datasheet, PDF (17/32 Pages) ON Semiconductor – 8-bit Microcontroller

LC87FBH08A
Continued from preceding page.
Parameter
Oscillation
frequency
range
(Note 2-3)
Symbol
FmCF(1)
FmCF(2)
FmCF(3)
Pin/Remarks
CF1, CF2
CF1, CF2
CF1, CF2
FmMRC(1)
FmMRC(2)
FmRC
Conditions
12MHz ceramic oscillation.
See Fig. 1.
10MHz ceramic oscillation.
See Fig. 1.
4MHz ceramic oscillation.
CF oscillation normal amplifier size selected.
(CFLAMP=0) See Fig. 1.
4MHz ceramic oscillation.
CF oscillation low amplifier size
selected. (CFLAMP=1)
See Fig. 1.
Frequency variable RC oscillation.
(Note 2-4)
Frequency variable RC oscillation.
 Ta=-10 to +85C
(Note 2-4)
Internal medium-speed RC oscillation
VDD[V]
2.7 to 5.5
2.2 to 5.5
1.8 to 5.5
2.2 to 5.5
1.8 to 5.5
1.8 to 5.5
1.8 to 5.5
Specification
min
typ
max
unit
12
10
4
4
MHz
7.84
8.0
8.16
7.88
8.0
8.12
0.5
1.0
2.0
FmSRC
Internal low-speed RC oscillation
1.8 to 5.5
50 100
200
FsX’tal
XT1, XT2
32.768kHz crystal oscillation
kHz
1.8 to 5.5
32.768
See Fig. 1.
Oscillation
tmsMRC
When Frequency variable RC
stabilization
time
oscillation state is switched from
stopped to enabled.
1.8 to 5.5
100 s
See Fig. 3.
Note 2-3: See Tables 1 and 2 for the oscillation constants.
Note 2-4: When switching the system clock, allow an oscillation stabilization time of 100s or longer after the
frequency variable RC oscillator circuit transmits from the "oscillation stopped" to "oscillation enabled" state.
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended
Operating Ranges limits may affect device reliability.
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