LC87F06J2A

No.A0432-26/32

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]

Rd1

[

Ω]

Operating

Voltage

Range

[V]

typ

[ms]

max

[ms]

Remarks

15MHz

MURATA

CSTCE15M0V53-R0

(15)

(15)

470

3.0 to 5.5

0.1

0.5

Internal C1, C2

SMD-type

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

follwing cases (see Figure 4).

• The time interval that is required for the oscillation to get stabilized after VDD goes above the operating voltage lower

limit.

• The time interval that is required for the oscillation to get stabilized after the instruction for starting the mainclock

oscillation circuit is executed.

• The time interval that is required for the oscillation to get stabilized after the HOLD mode is reset and ocsillation is

started.

• The time interval that is required for the oscillation to get stabilized after the X'tal Hold mode, under the state which

the CFSTOP (bit 0 of the OCR register) = 0, is reset and ocsillation is started.

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]

Rf1

[

Ω]

Rd2

[

Ω]

Operating

Voltage

Range

[V]

typ

[s]

max

[s]

Remarks

32.768kHz

EPSON

TOYOCOM

MC-306

18

18

OPEN

560k

2.2 to 5.5

1.3

3.0

Applicable

CL value = 12.5pF

SMD-type

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

follwing cases (see Figure 4).

• The time interval that is required for the oscillation to get stabilized after VDD goes above the operating voltage lower

limit.

• The time interval that is required for the oscillation to get stabilized after the instruction for starting the subclock

oscillation circuit is executed.

• The time interval that is required for the oscillation to get stabilized after the Hold mode, under the state which the

EXTOSC (bit 6 of the OCR register) = 1, is reset and ocsillation is started.

• The time interval that is required for the oscillation to get stabilized after the Hold mode, under the state which the

DMSRUN (bit 7 of the DMSCNT register) = 1, is reset and ocsillation is started.