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 47 of 62
5.7 Power-Up Time
The time until the BlueMod+S42is able to accept link requests or serial data depends on the
firmware version and on the source for the slow clock. Using TIO firmware version , the
device is ready (as indicated by GPIO IOA, measured from the release of EXT_RES# or
VSUP rising above 1,7V) as follows:
• t
DeviceReady
0,9s (typ.) if an external 32,768kHz crystal is connected.
• t
DeviceReady
1,7s (typ.) if no external signal is provided so the internal RC is used.