ST Microelectronics SP1ML Users Manual

ST CONFIDENTIAL

February 2014

Doc ID TBD Rev 0.8 Rev 0.8

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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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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

Symbol

Parameter

Min.

Typ.

Max.

Unit

T

STG

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

Symbol

Parameter

Min.

Typ.

Max.

Unit

V

IL

(1)

I/O input low level voltage

-0.3

-

0.3 VDD

V

V

IH

(1)

I/O input high level voltage

0.7 VIN

-

VDD+0.3

V

2 Hardware specification

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

2.1 Recommended operating conditions

Table 1. Recommended operating conditions

2.2 Absolute maximum ratings

Table 2. Absolute maximum ratings

2.3 I/O operating characteristics

Table 3. I/O operating characteristics

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

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Symbol

Parameter

Test Conditions

Typ.

Unit

IDD

Supply current

Operating mode
Tx, +11dBm, 2-FSK, 915 MHz

20

mA

Operating mode
Tx, -7dBm, 2-FSK, 915 MHz

8

mA

Operating mode
Rx, 915 MHz

11

mA

Operating mode – Idle

800

µA

Command mode

1.3

mA

Standby

1.4

µA

Modulation

Standards

Parameter

Max.

Unit

2-FSK
GFSK

MSK

FCC Part 15.207

(1)

FCC Part 15.247

(1)

EN 300 220-2 V2.4.1

(2)

EN 301 489-01 V1.9.2

(2)

EN 301 489-03 V1.4.1

(2)

Data rate

500

kbps

Output power

+11.6

dBm

OOK

ASK

FCC Part 15.207

(1)

FCC Part 15.249

(1)

EN 300 220-2 V2.4.1

(2)

EN 301 489-01 V1.9.2

(2)

EN 301 489-03 V1.4.1

(2)

Data rate

250

kbps

Output power

+8.5

dBm

2.4 Current consumption

Table 4. Current consumption

2.5 RF 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

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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