LC87F5LP6A

No.A0664-25/28

Characteristics of a Sample Main System Clock Oscillation Circuit

Given below are the characteristics of a sample main system clock oscillation circuit that are measured using a

SANYO-designated oscillation characteristics evaluation board and external components with circuit constant values

with which the oscillator vendor confirmed normal and stable oscillation.

Table 1 Characteristics of a Sample Main System Clock Oscillator Circuit with a Ceramic Oscillator

Circuit Constant

Oscillation

Stabilization

Time

Nominal

Frequency

Vendor

Name

Oscillator Name

C1

[pF]

C2

[pF]

Rf1

[

Ω]

Rd1

[

Ω]

Operating

Voltage

Range

[V]

typ

[ms]

max

[ms]

Remarks

12MHz

CSTCE12M0G52-R0

(10)

(10)

Open

470

4.5 to 5.5

0.05

0.15

Internal C1,C2

CSTCE10M0G52-R0

(10)

(10)

Open

1.0k

4.5 to 5.5

0.05

0.15

Internal C1,C2

10MHz

CSTLS10M0G53-B0

(15)

(15)

Open

680

4.5 to 5.5

0.05

0.15

Internal C1,C2

CSTCE8M00G52-R0

(10)

(10)

Open

2.2k

3.0 to 5.5

0.05

0.15

Internal C1,C2

8MHz

CSTLS8M00G53-B0

(15)

(15)

Open

680

3.0 to 5.5

0.05

0.15

Internal C1,C2

CSTCR5M00G53-R0

(15)

(15)

Open

3.3k

2.5 to 5.5

0.05

0.15

Internal C1,C2

5MHz

MURATA

CSTLS5M00G53-B0

(15)

(15)

Open

1.5k

2.5 to 5.5

0.05

0.15

Internal C1,C2

The oscillation stabilization time refers to the time interval that is required for the oscillation to get stabilized after VDD

goes above the operating voltage lower limit (see Fig. 4).

Characteristics of a Sample Subsystem Clock Oscillator Circuit

Given below are the characteristics of a sample subsystem clock oscillation circuit that are measured using a SANYO-

designated oscillation characteristics evaluation board and external components with circuit constant values with which

the oscillator vendor confirmed normal and stable oscillation.

Table 2 Characteristics of a Sample Subsystem Clock Oscillator Circuit with a Crystal Oscillator

Circuit Constant

Oscillation

Stabilization Time

Nominal

Frequency

Vendor

Name

Oscillator Name

C3

[pF]

C4

[pF]

Rf2

[

Ω]

Rd2

[

Ω]

Operating

Voltage Range

[V]

typ

[s]

max

[s]

Remarks

32.768kHz

SEIKO

EPSON

MC-306

18

18

Open

560k

2.5 to 5.5

1.3

3.0

Applicable

CL value=12.5pF

The oscillation stabilization time refers to the time interval that is required for the oscillation to get stabilized after the

instruction for starting the subclock oscillation circuit is executed and to the time interval that is required for the

oscillation to get stabilized after the HOLD mode is reset (see Fig. 4).

Note: The components that are involved in oscillation should be placed as close to the IC and to one another as possible

because they are vulnerable to the influences of the circuit pattern.

Figure 1 Ceramic Oscillator Circuit

Figure 2 Crystal Oscillator Circuit

Figure 3 AC Timing Measurement Point

0.5VDD

C3

Rd2

C4

X’tal

XT2

XT1

Rf2

C1

C2

CF

CF2

CF1

Rd1

Rf1