User manual

PmodRF2™ Reference Manual
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asserted by the PmodRF2 when data is available for the host device. The INT line is de-asserted after the INTSTAT
register is read.
Connector J1 – SPI Communications
Pin
Signal
Description
1
~CS
Chip Select
2
SDI
Serial Data In
3
SDO
Serial Data Out
4
SCK
Serial Clock
5
GND
Power Supply Ground
6
VCC
Power Supply (3.3V)
7
INT
Interrupt Output
8
~RST
Hardware Reset
9
WAKE
Hardware Wake
10
NC
Not Connected
11
GND
Power Supply Ground
12
VCC
Power Supply (3.3V)
Table 1. Interface connector signal description.
The SPI interface standard uses four signal lines. These are chip select (~CS), serial data in (SDI), serial data out
(SDO), and serial clock (SCK). These signals map to the following signals on the MRF24J40: ~CS corresponds to the
Chip Select signal (~CS), SDI corresponds to Serial Data Input (SDI), SDO corresponds to Serial Data Output (SDO),
and SCK corresponds to the Serial Clock signal (SCK).
3 Power Supply
The PmodRF2 is designed to work with Digilent microcontroller boards that have 12-pin header connectors.
The PmodRF2 requires a 2.7V-3.6V supply voltage. A 3.3V power supply voltage is available on all Digilent system
boards and is provided as part of the 12-wire Pmod interface standard.
Digilent system boards with Pmod interface connectors allow jumper selection of the power supply voltage to be
provided to the Pmod.
WARNING: Ensure that the system board is jumpered to provide 3.3V to the module before applying power to the
board.
For more information on the MRF24J40, see the MRF24J40 datasheet at the Microchip web site.