RFW-D100 Vishay, RFW-D100 Datasheet - Page 2

• Manufacturer Part Number: RFW-D100
• Manufacturer: Vishay

Specifications of RFW-D100

• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Package Type: LQFP
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

DESCRIPTION
The RFW-D100 is a complimentary chip to the
RFW122 chipset. The D100 provides a parallel
interface to a MCU (microcontroller unit). It also
provides other features, that enable implementing the
protocol suitable for wireless communication.
VISHAY ADVANCED TECHNOLOGIES LTD. -
RFWAVES DIVISION ("RFWAVES") has developed a
very low cost wireless modem (RFW122) for short
range, cost sensitive applications. The modem is a
physical layer element (PHY) – allowing the
transmission and reception of bits from one end to the
other.
In an RFWaves application, the MCU is in charge of
the MAC layer protocol. The RFW-D100 was
developed in order to reduce the real time demands of
the MCU handling the MAC protocol. The RFW-D100
gives the MCU an easy parallel interface with the
RFW122, similar to memory access. It converts the
fast serial input to 8-bit words, which are much easier
for an 8-bit MCU to work with. In addition, it requires a
lower rate oscillator. It buffers the input through a
16-byte FIFO, giving the MCU access to the
RFW-D100 more efficiently. Instead of reading one
byte per interrupt, the MCU can read up to 16 bytes in
RFW-D100
Vishay RFWaves
www.vishay.com
2
The company’s products are covered by one or
more of the following:
Taiwan
No. 176767, USA Patent No. 6,535,545. Other pat-
ents pending.
Patent
No.
155994,
For more information please contact: [e-mail]
Taiwan
Patent
each interrupt. In cases where each incoming byte
causes an interrupt, this reduces the MCU’s overhead
in reading incoming words, such as stack stuffing and
pipeline emptying. When using the FIFO, the MCU
pays the same overhead for all the FIFO bytes, as it
paid for only one byte without a FIFO.
A low-cost RFW-D100 with a built-in state machine
that can support basic wireless communication
elements has the following advantages:
FEATURES
* Any reference to the RFW122 includes the
• Shorter
• save CPU power and other resources for other
• Offer an easy, standard integrated solution
• Provides parallel interface with the RFW122* modem.
• Serial-to-parallel conversion of the RFW122
• Input FIFO (RX_FIFO)
• Output FIFO (TX_FIFO)
• Preamble correlation
• Packet address filter (Network and unique)
• CRC calculation
• Watchdog timer driven by internal RC-oscillator
• Working frequencies: 6-24 MHz
• Power save modes: Idle, power down
• Inter-RFWaves networks Carrier sense
• Discharge of the RFW122 reference capacitor
• Compensation for clock drifts between the
• Interrupt driver – connected to the MCU’s external
• Identifies strong transmissions on channel (RSSI).
RFW102/RFW112.
time-to-market
applications
interface
transmitting
RFW-D100
RFW-D100 requires low performance crystal
interrupt and informs the MCU about RFW-D100
events.
Used for Carrier sense mechanism.
development
up
RFW-D100
to
1000
time,
and
Document Number 84675
ppm.
hence
Rev. 1.1, 22-Jan-07
the
Hence,
receiving
shorter
the