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 19 of 62
Pin Name State: BlueMod+S42
EXT-RES# Input with pull-up
(1)
XL-IN Input floating (disconnected)
XL-OUT Input floating (disconnected)
UART-TXD Input floating (disconnected)
UART-RXD Input floating (disconnected)
UART-RTS# Input floating (disconnected) with pull-up resistor 470kΩ
(2)
UART-CTS# Input floating (disconnected)
IUR-OUT# Input floating (disconnected)
IUR-IN# Input floating (disconnected)
GPIO[0:14] Input floating (disconnected)
TESTMODE# Input floating (disconnected)
BOOT0 Input floating (disconnected)
SWDIO Input with pull-up
(1)
SWCLK Input with pull-down
(1)
(1)
pull-up, pull-down: R
PU,
R
PD
is typ. 13kΩ (11kΩ to 16kΩ)
(2)
a discrete resistor is used
Table 3: Pin States during Reset
The pin states as indicated in Table 3 are kept until hardware initialization has started.
3.3 Serial Interface
The serial interface of BlueMod+S42 is a high-speed UART interface supporting RTS/CTS
flow control and interface-up/down mechanism according to the UICP+ protocol (refer to
UICP_UART_Interface_Control_Protocol, 30507ST10756A). Electrical interfacing is at
CMOS levels (defined by VSUP; see chapter 5.4.1).
Transmission speeds are 9600 – 921600 bps and 1Mbps (asynchronous)
Character representation: 8 Bit, no parity, 1 stop bit (8N1)
Hardware flow-control with RTS and CTS (active low)
NOTE:
Transmission speed may be limited by firmware. See corresponding command reference
BlueMod+S42\Central AT Command Reference for further information.