User's Manual
Table Of Contents
- 1 Introduction
- 2 General Product Description
- 3 Application Interface
- 3.1 Power Supply
- 3.2 Reset
- 3.3 Serial Interface
- 3.4 GPIO Interface
- 3.5 I2C Interface 0F
- 3.6 SPI Serial Peripheral Interface
- 3.7 Bluetooth Radio Interface
- 1.1
- 3.8 NFC Function
- 3.9 Slow Clock Interface
- 3.10 Test Mode
- 3.11 Operating in a Power-Switched Environment
- 3.12 Serial Wire Debug Interface
- 3.13 DC/DC Converter
- 4 Module Pins
- 5 Electrical Characteristics
- 6 Mechanical Characteristics
- 7 Application Diagram
- 8 Compliances
- 9 Packing
- 10 Ordering Information
- 11 Safety Recommendations
- 12 Document History
BlueMod+S42 Hardware User Guide
1VV0301303 Rev.3 – 2016-08-22
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
BlueMod+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: BlueMod+S42 SPI Interface (Example: Master Mode)
3.7 Bluetooth Radio Interface
The BlueMod+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