A13 datasheet(31/55 Pages) ETC2

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Allwinner Technology CO., Ltd.

A13 Datasheet v1.30

December 10, 2012

The 24.000MHz frequency is used to generate the main source clock of the A13 device.

6.4.1.

24MHz Oscillator Characteristics

Table 6-4 lists the 24.MHz crystal specifications.

Symbol

Parameter

Min

Typ

Max

Unit

1/(tCPMAIN)

Crystal Oscillator Frequency Range

24.000

MHz

tST

Startup Time

–

Frequency Tolerance at 25 °C

-50

–

+50

ppm

Oscillation Mode

Fundamental

–

Maximum change over temperature range

-50

–

+50

ppm

PON

Drive level

–

Equivalent Load capacitance

–

CL1,CL2

Internal Load capacitance(CL1=CL2)

–

Series Resistance(ESR)

–

Duty Cycle

Motional capacitance

–

CSHUT

Shunt capacitance

–

RBIAS

Internal bias resistor

MΩ

Table 6-4 24MHz Oscillator Characteristics

6.5.

Power up/down and Reset Specifications

The external voltage regulator and other power-on devices must provide the processor with a

specific sequence of power and resets to ensure proper operation.

Power

Reset

VCC/VDD/AVCC/DRAMVCC

T>300μs

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