LC87FBG08A

No.A2046-15/30

Continued from preceding page.

Parameter

Symbol

Pin/Remarks

Conditions

Specification

VDD[V]

min

typ

max

unit

Oscillation

frequency

range

(Note 2-3)

FmCF(1)

CF1, CF2

12MHz ceramic oscillation.

See Fig. 1.

2.7 to 5.5

12

MHz

FmCF(2)

CF1, CF2

10MHz ceramic oscillation.

See Fig. 1.

2.2 to 5.5

10

FmCF(3)

CF1, CF2

4MHz ceramic oscillation.

CF oscillation normal amplifier size selected.

(CFLAMP=0) See Fig. 1.

1.8 to 5.5

4

4MHz ceramic oscillation.

CF oscillation low amplifier size

selected. (CFLAMP=1)

See Fig. 1.

2.2 to 5.5

4

FmMRC(1)

Frequency variable RC oscillation.

(Note 2-4)

1.8 to 5.5

7.84

8.0

8.16

FmMRC(2)

Frequency variable RC oscillation.

• Ta=-10 to +85°C

(Note 2-4)

1.8 to 5.5

7.88

8.0

8.12

FmRC

Internal medium-speed RC oscillation

1.8 to 5.5

0.5

1.0

2.0

FmSRC

Internal low-speed RC oscillation

1.8 to 5.5

50

100

200

kHz

FsX’tal

XT1, XT2

32.768kHz crystal oscillation

See Fig. 1.

1.8 to 5.5

32.768

Oscillation

stabilization

time

tmsMRC

When Frequency variable RC

oscillation state is switched from

stopped to enabled.

See Fig. 3.

1.8 to 5.5

100

μs

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

μs or longer after the

frequency variable RC oscillator circuit transmits from the "oscillation stopped" to "oscillation enabled" state.