Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 1058

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Note:

1. R

S

 is the series resistor.

 C

LEXT

 = 2x(

C

CRYSTAL

 – 

C

para

 

– 

C

PCB

). 

Where 

C

PCB

 is the capacitance of the printed circuit board (PCB) track layout from the crystal to the SAM4 pin.

F

req

Operating Frequency

Normal mode with crystal

32.768

kHz

Supply Ripple Voltage (on VDDIO)

Rms value, 10 kHz to 10 MHz

30

mV

Duty Cycle

40

50

60

%

Startup Time

Rs < 50 K

Ω

Rs < 100 K

Ω

C

crystal

 = 12.5 pF

C

crystal

 = 6 pF

C

crystal

 = 12.5 pF

C

crystal

 = 6 pF

—

—

900

300

1200

500

ms

Iddon

Current Consumption

Rs < 50 K

Ω

Rs < 100 K

Ω

C

crystal

 = 12.5 pF

C

crystal

 = 6 pF

C

crystal

 = 12.5 pF

C

crystal

 = 6 pF

—

550

380

820

530

1150

980

1600

1350

nA

P

ON

Drive Level

—

—

0.1

μW

R

f

Internal Resistor

Between XIN32 and XOUT32

—

10

M

Ω

C

LEXT

Maximum External Capacitor
on XIN32 and XOUT32

—

—

20

pF

C

para

Internal Parasitic Capacitance

0.6

0.7

0.8

pF

XIN32

XOUT32

C

LEXT

C

LEXT

SAM4 

ESR

Equivalent Series Resistor (R

S)

Crystal @ 32.768 kHz

—

50

100

K

Ω

C

M

Motional Capacitance

Crystal @ 32.768 kHz

0.6

—

3

fF

C

SHUNT

Shunt Capacitance

Crystal @ 32.768 kHz

0.6

—

2

pF