ATWINC1500B-MU 데이터 시트보기 (PDF) - Atmel Corporation

부품명

상세내역

제조사

ATWINC1500B-MU

IEEE 802.11 b/g/n Network Controller SoC

Atmel Corporation 

Figure 5-1. XO Connections

XO_N

XO_P

External Clock

XO_N

XO_P

ATWINC1500B

ATWINC1500B

(a)

(b)

(a) Crystal Oscillator is Used

(b) Crystal Oscillator is Bypassed

Table 5-2 specifies the electrical and performance requirements for the external clock.

Table 5-2. Bypass Clock Specification

Parameter

Oscillation frequency

Voltage swing

Stability – Temperature and Aging

Phase Noise

Jitter(RMS)

Min.

12

0.5

-25

Max.

32

1.2

+25

-130

<1psec

Unit

MHz

Vpp

ppm

dBc/Hz

Comments

Must be able to drive 5pF load @ de-

sired frequency

Must be AC coupled

At 10kHz offset

Based on integrated phase noise

spectrum from 1kHz to 1MHz

5.2 Low Power Oscillator

ATWINC1500B has an internally-generated 32kHz clock to provide timing information for various sleep

functions. Alternatively, ATWINC1500B allows for an external 32kHz clock to be used for this purpose, which is

provided through Pin 24 (RTC_CLK). Software selects whether the internal clock or external clock is used.

The internal low-power clock is ring-oscillator based and has accuracy within 10,000ppm. When using the

internal low-power clock, the advance wakeup time in beacon monitoring mode has to be increased by about

1% of the sleep time to compensate for the oscillator inaccuracy. For example, for the DTIM interval value of 1,

wakeup time has to be increased by 1ms.

For any application targeting very low power consumption, an external 32kHz RTC clock should be used.

Atmel ATWINC1500B-MU [DATASHEET]

Atmel-42487B-ATWINC1500B-MU_Datasheet_03/2016

11 1

1

Share Link: