S42 Hardware User Guide
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 26 of 62
3.6
SPI Serial Peripheral Interface
The serial peripheral interface (SPI) allows for full-duplex, synchronous, serial
communication with external devices. The interface can be configured as the
master
and then
provides the communication clock (SCK) to the external slave device(s), or as the
slave
. The
SPI Interface supports SPI-modes 0 through 3. Module pins are used as follows:
•
GPIO[2]: SPI-MOSI
•
GPIO[5]: SPI-MISO
•
GPIO[8]: SPI-SCK
GPIO[8]/SPI-SCK
GPIO[2]/SPI-MOSI
S42
E-2
SPI-Master
connected device
SPI-Slave
GPIO[5]/SPI-MISO
D-1
F-2
SCK, SPI_CLK
SDI, MOSI
SDO, MISO
typical signals:
Figure 9: S42 SPI Interface (Example: Master Mode)
3.7
Bluetooth Radio Interface
The S42/AI includes an integrated ceramic antenna.
3.8
NFC Function
The NFCT peripheral supports communication signal interface type A and 106 kbps bit rate
from the NFC Forum.
With appropriate software, the NFC peripheral can be used to emulate the listening device
NFC-A as specified by the NFC Forum.
Main features for the NFC peripheral:
•
NFC-A listen mode operation
•
13.56 MHz input frequency
•
Bit rate 106 kbps
•
Wake-on-field low power field detection (SENSE) mode
•
Frame assemble and disassemble for the NFC-A frames specified by the NFC Forum
•
Programmable frame timing controller