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

 1059

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Notes: 1. R

S

 is the series resistor

2. Rs = 100–200 Ohms; Cs = 2.0–2.5 pF; Cm = 2–1.5 fF(typ, worst case) using 1 K

Ω serial resistor on XOUT.

3. Rs = 50–100 Ohms; Cs = 2.0–2.5 pF; Cm = 4–3 fF(typ, worst case).

4. Rs = 25–50 Ohms; Cs = 2.5–3.0 pF; Cm = 7–5 fF (typ, worst case).

5. Rs = 20–50 Ohms; Cs = 3.2–4.0 pF; Cm = 10–8 fF(typ, worst case).

C

LEXT

 = 2 x (

C

CRYSTAL

 – 

C

L

 

– 

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

3

16

20

MHz

Supply Ripple Voltage (on VDDPLL)

Rms value, 10 kHz to 10 MHz

—

—

30

mV

Duty Cycle

40

50

60

%

T

ON

Startup Time

3 MHz, C

SHUNT 

= 3 pF

8 MHz, C

SHUNT 

= 7 pF

16 MHz, C

SHUNT 

= 7 pF with Cm = 8 fF

16 MHz, C

SHUNT 

= 7 pF with Cm = 1.6 fF

20 MHz, C

SHUNT 

= 7 pF

—

—

14.5

4

1.4

2.5

1

ms

I

DD_ON

Current Consumption

(on VDDIO)

—

230

300

390

450

350

400

470

560

μA

P

ON

Drive Level

3 MHz

8 MHz

16 MHz, 20 MHz

—

—

15

30

50

μW

R

f

Internal Resistor

Between XIN and XOUT

—

0.5

—

M

Ω

C

LEXT

Maximum External Capacitor
on XIN and XOUT

—

—

17

pF

C

L

Internal Equivalent Load Capacitance

Integrated load capacitance

(XIN and XOUT in series)

7.5

9.5

10.5

pF

XIN

XOUT

C

LEXT

C

L

C

LEXT

C

Crystal

SAM4

R = 1K if Crystal Frequency

is lower than 8 MHz