User's Manual

User Manual
Version 01.01
2011-12-22
Radio modules deRFarm7
dresden elektronik
ingenieurtechnik gmbh
Enno-Heidebroek-Str. 12
01237 Dresden / Germany
Tel.: +49 351 – 31 85 00
Fax: +49 351 – 3 18 50 10
[e-mail]
www.dresden-elektronik.de
Page 21 of 38
7.2. Internal Connections
Table 9 shows the internal signal connection between MCU and transceiver. This description
is valid for all deRFarm7 radio modules.
Table 9: Internal connection of MCU and Transceiver
Pin assignment of ATSAM7X512 to AT86RF212 / AT86RF231
µC-
Pin
µC-Port
TRX-
Pin
TRX-
Port
Type
Comments
D1
PA23/TD/SPI1_MOSI
22
MOSI
Input
Master Out / Slave In
D2
PA24/RD/SPI1_MISO
20
MISO
Output
Master In / Slave Out
A1
PA22/TK/SPI1_SPCK
19
SCLK
Input
SPI Serial Clock
A2
PA21/TF/SPI1_NPCS0
23
SEL
Input
SPI Select
J1
PA29/FIQ/SPI1_NPCS3
24
IRQ
Output
1. Interrupt request signal
2. Frame Buffer Empty Indicator
H7
PA9/CTS1
8
RSTN
Input
Reset
C10
PA15/TCLK2
17
CLKM
Output
Master clock signal output, in-
ternal lowpass filter assembled
H8
PA8/RTS1
11
SLP_TR
Input
Controls sleep, transmit start,
receive states
F2
PB23/TIOA0/DCD1
10
DIG2
Output
1. Antenna Diversity RF switch
control
2. RX Frame Time Stamping
Note:
For best radio performance results it is recommended to deactivate the clock output. Accord-
ing to transceiver datasheet register 0x03 must be set to value 0x00 to deactivate CLKM.