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 23 of 62
3.3.3 Baud Rate Deviation
The following table shows the deviation in percent of the standard data rates. The deviation
may be caused by the inaccuracy of the crystal oscillator or granularity of the baud rate
generator.
Baud
Rate
nominal
Baud
Rate
actual
Deviation
[%]
9600 9598 -0,02
14400 14401 0,01
19200 19208 0,04
28800 28777 -0,08
38400 38369 -0,08
57600 57554 -0,08
76800 76923 0,16
115200 115108 -0,08
230400 231884 0,64
250000 250000 0,00
460800 457143 -0,79
921600 921176 -0,05
Table 4: Deviation of Baud rates
Note: The total deviation of sender and receiver shall not exceed 2.5% to prevent
loss of data.
3.3.4 Dynamic I/O Signal Type Changes depending on the UICP
status
In order to allow customers to use the serial interface with the minimal signal count on the
one side and to reduce current consumption when using UICP on the other side, the
BlueMod+S42 FW supports the following dynamic I/O signal type changes depending on the
UICP activated resp. deactivated status.