ATSAM4S-WPIR-RD Atmel, ATSAM4S-WPIR-RD Datasheet - Page 15

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ATSAM4S-WPIR-RD

Manufacturer Part Number
ATSAM4S-WPIR-RD
Description
Development Boards & Kits - ARM SAM4S16 W.PIR CAMERA REF. DESIGN
Manufacturer
Atmel
Datasheet

Specifications of ATSAM4S-WPIR-RD

Rohs
yes
Product
Reference Designs
Tool Is For Evaluation Of
ATSAM3S4BA
Core
ARM Cortex M3
Interface Type
JTAG, USB
Operating Supply Voltage
5 V
Data Bus Width
32 bit
For Use With
RF231USB-RD
4.6
4.7
Figure 4-8. RF parts outside RF shielding.
The layout in the vicinity of the chip antenna is designed as a tuning structure, a transmission line with inductors and
capacitors of defined load impedance, to optimize the matching of transceiver and antenna.
RF tuning and best antenna performance has been achieved by implementing a matching network consisting of
inductors and capacitors shown in
50Ω balun shown in
It is optional to retrofit an U.FL miniature coaxial RF connector to enable cable based measurements. A footprint for an
U.FL connector is provided on the board in the vicinity of the chip antenna. To route the RF signal to the U.FL
connector, C40 must be removed and re-assembled on C33’s footprint.
See Section
Board information
To identify the board type by software, a special memory area described in Section
board contains, but is not limited to, its unique serial number, the MAC address
uppermost memory block of the external flash, the data are written during board production testing. These can be used
to optimize system performance.
For a complete description of all board data, features and options please refer to Appendix A, MIB data A.4
Note:
On-board peripherals
This section describes the important on-board peripherals: memory components, plugs and connectors as well as other
interface and access options to the board.
50Ohm
50Ohm
1.
i
i
50Ohm
4.5
The board-specific information is stored persistently in this flash memory block. It must NOT be used
competitively from the mass storage device. This is assured in the board’s delivery condition. Pay attention
when implementing your own firmware; double-check if necessary.
L2
1.5nH
C40
22pF
for details on the RF signal routing.
2.2nH
L3
i
Figure
n.b.
C41
Atmel AVR2030: ATRF231USB – Hardware User Manual [APPLICATION NOTE]
C33
22pF
4-7.
ANT1
2450AT43B100
GND
GND
Figure
4-8. Antenna matching is realized with capacitors effective in the line to the
50Ohm
i
GND
R2
10k
X3
UFL
GND GND
(1)
, and calibration values. Stored in the
4.7.1
is used. Information about the
42018A−AVR−08/2012
Table
8-2.
15

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