Integration 2.0r manual Traditional mode

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OVERVIEW

The demo uses the developer-friendly features of the IA4420 device. In receive mode the microcontroller reads the received bytes from the IA4420’s FIFO, and transmits them through the TX latch. This approach dramatically reduces the load on the micro, because the microcontroller doesn’t have to monitor every bit, only the bytes. This means the timing constraints in an application can be reduced at least by a factor of eight for both the transmitting and the receiving sides. See the PROCESSOR ACTIVITY lines on Figure 2, as demonstrated for both the ‘Traditional’ transceiver mode and the Integration ‘FIFO’ mode.

"Traditional" mode

DATA CLK

PROCESSOR ACTIVITY

FIFO mode

byte1

RF PACKETS (8bit)

 

1

 

INTERRUPT REQs

PROCESSOR ACTIVITY

FIFO IT level set to 8 bit

FIFO LEVEL STATUS

FIFO empty

2

3

4

5

Fig 2. Process Activity in FIFO Mode when Compared to a Traditional Mode of Operation

3

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Contents ISM Band Repeater Demo Page About this Guide Table of Contents Demo KIT Contents Overview Repeater Block DiagramTraditional mode LCD DescriptionDemo Unit This page is intentionally left blank IA4220/21 Transmitter Section Radio HardwareIC1 Schematic Push Button Demo TX BoardPCB Layout 434 MHZ Push Button TX Board PCB Layout 915 MHZ Push Button TX Board Ohm Transceiver LCD Board Ohm Transceiver Non-LCD Board IA4420 Transceiver SectionRepeater Demo SchematicPCB Layout 50 OHM Repeater Demo LCD Version IRQ GND SCK Miso Mosi IC1 SchematicPCB Layout 50 OHM Repeater Demo NON-LCD This page is intentionally left blank IA4320 Receiver Section IA4320 Schematic 434 MHZ Push Button RX BoardPCB Layout 434 MHZ Push Button RX Board Schematic 915 MHZ Push Button RX Board PCB Layout 915 MHZ Push Button RX Board
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