ST Microelectronics SP1ML Users Manual

ST CONFIDENTIAL

SPLML-868 and SP1ML-915

SPIRIT1 868 and 915 MHz Low Power RF Modules

PRELIMINARY DATASHEET

Features

Complete RF ready Spirit1 module

Integrated antenna and crystal

STM32L microcontroller up to 32 MHz

Low power consumption

UART interface with AT command set

Operates from a single 1.8V to 3.6V supply

863 to 870 MHz operation (SP1ML-868)

902 to 928 MHz operation (SP1ML-915)

Output power up to +11.6dBm

Data rates up to 500kbps

Modulation schemes: 2-FSK, GFSK, GMSK, OOK, and ASK

Compact size: 14mm x 13.4mm x 2.5mm

Operating temperature: -40 °C to 85 °C

FCC and CE regulatory approvals

Applications

Serial cable replacement

Home automation

M2M industrial control

Service diagnostic

Data acquisition equipment

Machine control

Sensor monitoring

Security systems

Mobile health and medical

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Contents

1	Description...........................................................................................		4
2	Hardware specification........................................................................		5
	2.1	Recommended operating conditions .........................................................................	5
	2.2	Absolute maximum ratings........................................................................................	5
	2.3	I/O operating characteristics .....................................................................................	5
	2.4	Current consumption.................................................................................................	6
	2.5	RF compliance limits.................................................................................................	6
	2.6	Pin assignment .........................................................................................................	7
	2.7	Pin placement ...........................................................................................................	8
	2.8	Hardware block diagram ...........................................................................................	8
3	Hardware design..................................................................................		9
	3.1	Pin usage..................................................................................................................	9
	3.2	Typical application circuit ........................................................................................	10
	3.3	Layout guidelines ....................................................................................................	11
	3.4	Recommended footprint..........................................................................................	12
	3.5	Module reflow installation........................................................................................	13
4	Mechanical data .................................................................................		14
	4.1	RoHS compliance ...................................................................................................	14
5	Regulatory compliance .....................................................................		15
	5.1	FCC certification .....................................................................................................	15
	5.2	CE certification........................................................................................................	15
	5.3	Labeling instructions ...............................................................................................	16
	5.4	Product manual instructions ....................................................................................	16
6	Ordering Information.........................................................................		18

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List of tables
Table 1. Recommended operating conditions		.................................................................................... 5
Table 2. Absolute maximum ratings ...................................................................................................		5
Table 3. I/O operating characteristics .................................................................................................		5
Table 4.	Current consumption ............................................................................................................	6
Table 5. RF compliance limits ............................................................................................................		6
Table 6.	Pin assignment.....................................................................................................................	7
Table 7.	Module pin usage .................................................................................................................	9
Table 8.	Soldering profile .................................................................................................................	13
Table 12.	Ordering information .......................................................................................................	18
List of figures
Figure 1.	Pin placement ......................................................................................................................	8
Figure 2. Hardware block diagram ......................................................................................................		8
Figure 3. Typical application circuit ...................................................................................................		10
Figure 4.	Layout guidelines ...............................................................................................................	11
Figure 5.	Recommended footprint .....................................................................................................	12
Figure 6.	Soldering profile .................................................................................................................	13
Figure 7.	Mechanical data .................................................................................................................	14

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1 Description

The SP1ML-868 and SP1ML-915 are low power RF modules based on the SPIRIT1 radio, with integrated voltage regulation, antenna, crystal and microcontroller in a compact surface mount module form-factor. The module allows OEMs to easily add wireless capability to any electronic device without requiring in-depth RF experience, and has the necessary FCC modular approvals and CE compliance to reduce time to market.

The UART host interface allows simple connection to an external microcontroller. Access to module features is provided through an extended AT command set. A simple cable replacement model allows the module to be used similarly to a standard serial interface.

The microcontroller serial wire debug signals are available and allow the standard firmware to be replaced by a user application, enabling use as a wireless application module where no external microprocessor system is required. Select STM32L GPIO and peripherals are available for interfacing to external devices in the user application, and advanced features of the SPIRIT1 radio are also accessible.

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2 Hardware specification

General conditions (VIN = 3 V and TA = 25˚C).

2.1Recommended operating conditions

Table 1. Recommended operating conditions

Symbol	Parameter	Min.	Typ.	Max.	Unit
TA	Operating ambient temperature range	-40	-	85	˚C
VDD	Operating supply voltage	1.8	3	3.6	V
FREQ	RF frequency (SP1ML-868)	863	-	870	MHz
FREQ	RF frequency (SP1ML-915)	902	-	928	MHz

2.2Absolute maximum ratings

Table 2. Absolute maximum ratings

Symbol	Parameter	Min.	Typ.	Max.	Unit
TSTG	Storage temperature range	-40	-	85	˚C
VDD	Operating supply voltage	-0.3	-	3.9	V
VIO	I/O pin voltage	-0.3	-	5.5	V

2.3I/O operating characteristics

Table 3. I/O operating characteristics

Symbol	Parameter	Min.	Typ.	Max.	Unit
VIL(1)	I/O input low level voltage	-0.3	-	0.3 VDD	V
VIH(1)	I/O input high level voltage	0.7 VIN	-	VDD+0.3	V

1.For more details see the STM32L151RB datasheet, I/O port characteristics.

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2.4Current consumption

	Table 4.	Current consumption
	Symbol	Parameter	Test Conditions	Typ.	Unit
			Operating mode	20	mA
			Tx, +11dBm, 2-FSK, 915 MHz
			Operating mode	8	mA
			Tx, -7dBm, 2-FSK, 915 MHz
			Operating mode	11	mA
	IDD	Supply current	Rx, 915 MHz
			Operating mode – Idle	800	µA
			Command mode	1.3	mA
			Standby	1.4	µA

2.5RF compliance limits

The RF compliance limits are those tested for FCC and CE certification. These limits are enforced by the factory loaded firmware.

Table 5. RF compliance limits

Modulation	Standards		Parameter	Max.	Unit
	FCC Part 15.207 (1)		Data rate	500	kbps
2-FSK	FCC Part 15.247 (1)
GFSK	EN 300 220-2 V2.4.1 (2)
MSK	EN 301 489-01 V1.9.2	(2)	Output power	+11.6	dBm
	EN 301 489-03 V1.4.1 (2)
	FCC Part 15.207 (1)		Data rate	250	kbps
OOK	FCC Part 15.249 (1)
	EN 300 220-2 V2.4.1 (2)
ASK
	EN 301 489-01 V1.9.2	(2)
			Output power	+8.5	dBm
	EN 301 489-03 V1.4.1 (2)

1.FCC standards are only applicable to the SP1ML-915 module.

2.EN standards are only applicable to the SP1ML-868 module.

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