RF Front End
Designer Reference Manual
DRM050 — Rev 0
14
RF Front End
MOTOROLA
2.4 Interface IC RFW-D100
The RFW-D100 is a complimentary IC to the RFW-102 module. It
provides an MCU with a parallel interface to the RFW-102 transceiver
module and other features that enable implementing a protocol suitable
for wireless communication with a small burden on the MCU.
In HID application, the MCU is in charge of the MAC layer protocol. The
RFW-D100 is used to reduce the real-time demands of the MCU
handling the MAC protocol. It converts the fast serial input to 8-bit words,
which are much easier for 8-bit MCUs to work with. Also, it buffers the
input through a 16-byte FIFO, giving the MCU access the RFW-D100
efficiently. Instead of reading one byte per interrupt, the MCU can read
up to 16 bytes in each interrupt.
Below are the features of the RFW-D100 interface IC:
•
Provides parallel interface with the RFW102 modem
•
Serial to parallel conversion of the RFW102 interface
•
Input FIFO (RX_FIFO)
•
Output FIFO (TX_FIFO)
•
Preamble Correlation
•
Packet Address Filter
•
CRC calculation
•
Watchdog Timer driven by internal RC oscillator
•
Power saving mode: Idle, Power-down.
•
Receiver signal strength indication (RSSI)
For detailed information on the RFW-D100, please refer to the data
sheet about the RFW-D100 from the RFWaves website:
http://www.rfwaves.com
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..
