Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

1431

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

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

I

DDON

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