ST SPIRIT1 User manual

November 2013 DocID025094 Rev 1 1/48
UM1657
User manual
SPIRIT1 development kit
Introduction
The SPIRIT1 DK is a complete software package to support SPIRIT1 RF evaluation and
development. It contains a SPIRIT1 DK GRAPHICAL USER INTERFACE (SPIRIT1 DK -
GUI) which allows checking the SPIRIT1 main performance and easily measure parameters
such as sensitivity, output power and main features of the SPIRIT1. It also contains SPIRIT1
firmware libraries for STM32L and STM8L to allow development of SPIRIT1 applications. In
addition, it contains a Wireless M-BUS library with documentation and example applications
to allow development of Wireless M-BUS application based on the SPIRIT1.
www.st.com

Contents UM1657
2/48 DocID025094 Rev 1
Contents
1 Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 STEVAL-IKR002Vx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.1 STEVAL-IKR002Vx (RF motherboard) . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.2 Microcontroller and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1.4 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.5 Extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.6 Daughter board test point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.7 Push buttons and joystick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1.8 JTAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.1.9 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 STEVAL-IKR002Vx (RF module) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2.1 Boost mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.3 STEVAL-IKR001V7D (with SPIRIT1 RF module with external
power amplifier @169 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.4 STEVAL-IKR001V8D (with SPIRIT1 RF module with external
power amplifier @868 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.5 STEVAL-IDS001Vx (SPIRIT1 USB dongle) . . . . . . . . . . . . . . . . . . . . . . . 15
1.5.1 Microcontroller and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.5.2 Extension connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.5.3 SWD interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.5.4 Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.5.5 RF connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.5.6 Push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.5.7 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1.6 STEVAL-IKR001Vx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1.6.1 STEVAL-IKR001Vx (RF motherboard) . . . . . . . . . . . . . . . . . . . . . . . . . 20
1.6.2 STEVAL-IKR001Vx (RF module) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2 Software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 SPIRIT1 DK - GUI description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.1 Firmware installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2 Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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3.2.1 Connection panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.2 Supply voltage panel (supported only in STEVAL-IKR001Vx -
RF motherboard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.3 Radio setting panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.4 RF test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.5 TX CW test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.2.6 TX PN9 test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.2.7 Packet setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.2.8 Packet setting - BASIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2.9 Packet setting - WMBUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3 Transmission test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.1 AES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3.2 Low level commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.3 How run a BER test using signal generator . . . . . . . . . . . . . . . . . . . . . . 37
3.4 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.4.1 Firmware version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.4.2 Firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.4.3 Save and load configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.4.4 Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4 SPIRIT1 WM-BUS GUI description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.1 Firmware installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2 Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5 SPIRIT1 Driver and example programs . . . . . . . . . . . . . . . . . . . . . . . . . 45
6 SPIRIT1 wireless M-BUS library and example programs . . . . . . . . . . 46
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

List of tables UM1657
4/48 DocID025094 Rev 1
List of tables
Table 1. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 3. SWD connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 4. SPIRIT DK firmware images. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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48
List of figures
Figure 1. STEVAL-IKR002Vx (RF motherboard). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2. STEVAL-IKR002Vx (RF module) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 3. STEVAL-IKR002Vx (RF module) boost mode configuration . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. STEVAL-IKR001V7D (RF module). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 5. STEVAL-IKR001V8D (RF module). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 6. STEVAL-IDS001Vx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 7. SWD connection scheme with ST-LINK/V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 8. RF connector scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 9. STEVAL-IKR001Vx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 10. STEVAL-IKR001Vx (RF module) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 11. SPIRIT DK - GUI installation window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 12. SPIRIT DK - driver installation window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 13. CONNECTION SETUP 1 - 1 PC WITH 2 SPIRIT DK - GUI. . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 14. CONNECTION SETUP 2 - 2 PC WITH 1 SPIRIT DK - GUI EACH . . . . . . . . . . . . . . . . . . 27
Figure 15. Spirit1 DK GUI Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16. Serial port selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 17. Supply voltage display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 18. Radio setting panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 19. RF test mode buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 20. Packet setting panel (Basic packet view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 21. Packet setting panel (MBUS Packet view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 22. Transmission test panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 23. AES Encryption operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 24. Low level commands panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 25. BER test using SPIRIT1 DK - GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 26. Tools list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 27. Help with user manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 28. WM-BUS GUI step 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 29. WM-BUS GUI step 2 (successful connection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 30. WM-BUS GUI step 3 and 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 31. WM-BUS GUI step 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 32. WM-BUS GUI step 9, 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Hardware description UM1657
6/48 DocID025094 Rev 1
1 Hardware description
The software SPIRIT1 DK - GUI supports all the hardware available as demo kit. The
hardware includes: STEVAL-IKR002Vx (with x = 1, 2, 3, 4, 5), STEVAL-IKR001V7D,
STEVAL-IKR001V8D, STEVAL-IKR001Vx (with x = 1, 2, 3, 4, 5) and STEVAL-IDS001Vx
(with x = 2, 3, 4, 5).
1.1 STEVAL-IKR002Vx
The SPIRIT1 DK is made up of two units connected to one PC or two PCs with USB cables.
Each unit is composed of an antenna for the selected band and two PCBs:
RF motherboard
RF module
1.1.1 STEVAL-IKR002Vx (RF motherboard)
The RF motherboard has an STM32L microcontroller used for driving the SPIRIT1
transceiver and to communicate to a PC via USB.
A connector on the motherboard (Figure 1) allows accessing the JTAG interface for
programming and debugging. The board can be powered through a mini-USB connector
that can also be used for I/O interaction with a USB Host. The board has also a user button,
a joystick and RESET button for user interaction. Temperature sensor and accelerometer
are included in the board. The RF module can be easily connected through a dedicated
interface.
This is the list of some of the features that are available on the boards:
– STM32L151RBT6 64-pin microcontroller.
– Mini USB connector for power supply and I/O.
– JTAG connector.
– RF daughterboard interface.
– One RESET button and one USER button.
– One LIS3DH accelerometer.
– One STLM75 temperature sensor.
– One joystick.
–5LEDs.
–OnePWRLED.
– One battery holder for 2 AAA batteries.
– One row of test points on the interface with the RF daughterboard

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Figure 1. STEVAL-IKR002Vx (RF motherboard)
1.1.2 Microcontroller and connections
The board has an STM32L151RB microcontroller. It's an ultralow power microcontroller with
128 KB of flash memory, 16 KB of RAM, 32-bit core ARM cortex-M3, 4 KB of data
EEPROM, RTC, LCD, timers, USART, I²C, SPI, ADC, DAC and comparators.
The microcontroller is connected to different components like buttons, LEDs and connectors
for external circuitry. The following table shows which functionality is available on each
microcontroller pin.
Table 1. MCU pin description versus board function
Pin name Pin n°
Board function
LEDs DB connector Buttons /
Joystick Accelerome ter Temp. sensor USB JTAG Ext. conn.
VLCD 1
PC13 2 DB_SDN_RST(1)
PC14 3 3
PC15 4 5
OSC_IN 5
OSC_OUT 6
NRST 7 RESET 7
PC0 8 LED1
PC1 9 LED2
PC2 10 DB_PIN3

Hardware description UM1657
8/48 DocID025094 Rev 1
Pin name Pin n°
Board function
LEDs DB connector Buttons /
Joystick Accelerome ter
Temperat
ure
sensor USB JTAG Ext.
conn.
PC3 11 9
VSSA 12
VDDA 13
PA0 14 11
PA1 15 13
PA2 16 15
PA3 17 17
VSS_4 18
VDD_4 19
PA4 20 SPI1_NSS
PA5 21 SPI1_SCK
PA6 22 SPI1_MISO
PA7 23 SPI1_MOSI
PC4 24 LED4
PC5 25 LED5
PB0 26 JOY_DOW
N
PB1 27 JOY_RIG
HT
PB2 28 18
PB10 29 INT1
PB11 30 INT2
VSS_1 31
VDD_1 32
PB12 33 DB_CSN*
PB13 34 DB_SCLK*
PB14 35 DB_SDO*
PB15 36 DB_SDI*
PC6 37 PUSH_BT
N
PC7 38 DB_IO0*
PC8 39 DB_IO1*
PC9 40 DB_IO2*
Table 1. MCU pin description versus board function (continued)

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48
1.1.3 Power
The board can be powered either by the mini USB connector CN1 (A in Figure 1) or by 2
AAA batteries. To power the board through USB bus, jumper JP1 must be in position 1-2, as
in Figure 1 (B). To power the board by batteries, 2 AAA batteries must be present in the
Pin name Pin n°
Board function
LEDs DB connector Buttons /
Joystick Accelerome ter
Temperat
ure
sensor USB JTAG Ext.
conn.
PA8 41 JOY_LEFT
PA9 42 JOY_CEN
TER
PA10 43 JOY_UP
PA11 44 USB_D
M
PA12 45 USB_D
P
PA13 46 JTMS 16
VSS_2 47
VDD_2 48
PA14 49 JTCK 14
PA15 50 JTDI 12
PC10 51 DB_IO3_IRQ*
PC11 52 DB_PIN1
PC12 53 DB_PIN2
PD2 54 LED3
PB3 55 JTDO 10
PB4 56 JNTRS
T8
PB5 57 TSEN_IN
T
PB6 58 I2C1_SCL
PB7 59 I2C1_SDA
BOOT0 60
PB8 61 4
PB9 62 6
VSS_3 63
VDD_3 64
1. These lines are also available on the test point row.
Table 1. MCU pin description versus board function (continued)

Hardware description UM1657
10/48 DocID025094 Rev 1
battery holder in the rear of the board and the jumper JP1 must be set in position 2-3.
When the board is powered, the green LED DL6 is ON, Figure 1 (C).
If needed, the board can be powered by an external DC power supply. Connect the positive
output of the power supply to the central pin of JP1 (pin 2) and the ground to one of the four
test point connectors on the motherboard.
1.1.4 Sensors
Two sensors are available on the motherboard:
– LIS3DH, an ultra-low power high performance three axes linear accelerometer (D
in Figure 1). The sensor is connected to the STM32L through the SPI interface.
Two lines for interrupts are also connected.
– STLM75, a high precision digital CMOS temperature sensor, with I²C interface (E
in Figure 1). The pin for the alarm function is connected to one of the STM32L
GPIOs.
1.1.5 Extension connector
There is the possibility to solder a connector on the motherboard to extend its functionality
(F in Figure 1). 16 pins of the microcontroller are connected to this expansion slot (Table 1).
1.1.6 Daughter board test point
In M Figure 1, a row of test point is available to the user for debugging and testing. The list
of signals available is:
1. GND
2. VDD
3. GPIO SDN (the pin to drive in SHUTDOWN the SPIRIT1)
4. SPI CSn
5. SPI MISO
6. SPI MOSI
7. SPI SCKL
8. SPIRIT1 GPIO2
9. SPIRIT1 GPIO3
10. SPIRIT1 GPIO1
11. SPIRIT1 GPIO0
12. GND.
1.1.7 Push buttons and joystick
For user interaction the board has two buttons and a joystick. One is to reset the
microcontroller; the other one is available to the application. There is also a digital joystick
with 4 possible positions (left, right, up, down) (G in Figure 1).
1.1.8 JTAG connector
A JTAG connector on the board (H in Figure 1) allows programming and debugging of the
STM32L microcontroller on board, using an in-circuit debugger and programmer like the ST-
LINK/V2.

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48
1.1.9 LEDs
Five LEDs are available (I in Figure 1).
– DL1: green.
– DL2: orange.
– DL3: red.
– DL4: blue
– DL5: yellow.
1.2 STEVAL-IKR002Vx (RF module)
The RF module includes 5 different possible BOM lists, on the same layout PCB. Each one
optimized for different RF band as follow:
169 MHz
315 MHz
433 MHz
868 MHz
915 MHz
The band indication is reported with a dummy resistor on the board, in A Figure 2.
A SMA connector on the RF module, in B Figure 2, allows connection with RF instruments
as spectrum analyzer and signal generator to the SPIRIT1 by RF cable or also connect an
antenna as the one included in the demo kit. The board is powered through the RF
daughterboard connector, in D Figure 2, by the RF motherboard and communicates through
this connector by SPI and some GPIOs with the microcontroller.
The VCC_RF pin of the RF daughterboard connector is linked to the Vbat of the SPIRIT1
through a jumper that can be also removed to measure the current consumption, in C
Figure 2
The RF module includes a memory EEPROM in which some information on the RF module
at manufactory time are stored. The information is stored in the first pages of the EEPROM.
The memory is not intended to be changed by user.

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12/48 DocID025094 Rev 1
Figure 2. STEVAL-IKR002Vx (RF module)
1.2.1 Boost mode
The SPIRIT1 can be configured to increase the output power in transmission mode.
In the default configuration the transmitter power amplifier (PA) output is biased by the 1.4 V
SMPS voltage output through the L0 external inductor (position D0 in the schematic,
Figure 3). This limits the maximum output power at about +11 dBm, measured at the 50 
connector via the reference design.
Biasing the PA output through the inductor L0 directly connected to the battery, instead of
the SMPS output allows the maximum output power delivered at the 50 connector (or at
the antenna) to be increased. The maximum output power changes with the voltage level
applied at the PA output.
To switch to the boost mode the inductor L0 must be removed from the position 1-2 D0 in
the schematic and soldered at the position 1-3 D0, then the voltage supply VCC_RF must
be provided.

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Figure 3. STEVAL-IKR002Vx (RF module) boost mode configuration
For more information see the application note AN4198 - SPIRIT1: increasing the output
power, available on the SPIRIT1 web site or in the document folder of this release.

Hardware description UM1657
14/48 DocID025094 Rev 1
1.3 STEVAL-IKR001V7D (with SPIRIT1 RF module with external
power amplifier @169 MHz)
The STEVAL-IKR001V7D includes RF motherboard and SPIRIT1 RF module with external
power amplifier tuned for 169 MHz band. A SMA connector on the RF module, in B Figure 4,
allows connection with RF instruments as spectrum analyzer and signal generator to the
SPIRIT1 by RF cable or also connect an antenna as the one included in the demo kit. The
board is powered through the RF daughterboard connector, in Figure 4, by the RF
motherboard and communicates through this connector by SPI and some GPIOs with the
microcontroller.
The VCC_RF pin of the RF daughterboard connector is linked to the Vbat of the SPIRIT1
through the jumper D in Figure 4 that can be also removed to measure the current
consumption, while the jumper C in Figure 4 is used to provide voltage to the power
amplifier (3.3 V).
The RF module includes a memory EEPROM in which some information on the RF module
at manufactory time are stored. The information is stored in the first pages of the EEPROM.
The memory is not intended to be changed by user.
Figure 4. STEVAL-IKR001V7D (RF module)

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1.4 STEVAL-IKR001V8D (with SPIRIT1 RF module with external
power amplifier @868 MHz)
The STEVAL-IKR001V8D includes RF motherboard and SPIRIT1 RF module with external
power amplifier tuned for 169 MHz band. A SMA connector on the RF module, in B Figure 5,
allows connection with RF instruments as spectrum analyzer and signal generator to the
SPIRIT1 by RF cable or also connect an antenna as the one included in the demo kit. The
board is powered through the RF daughterboard connector, in A Figure 5, by the RF
motherboard and communicates through this connector by SPI and some GPIOs with the
microcontroller.
The VCC_RF pin of the RF daughterboard connector is linked to the Vbat of the SPIRIT1
through the jumper D in Figure 5 that can be also removed to measure the current
consumption, while the jumper C in Figure 5 is used to provide voltage to the power
amplifier.
The RF module includes a memory EEPROM in which some information on the RF module
at manufactory time are stored. The information is stored in the first pages of the EEPROM.
The memory is not intended to be changed by user.
Figure 5. STEVAL-IKR001V8D (RF module)

Hardware description UM1657
16/48 DocID025094 Rev 1
1.5 STEVAL-IDS001Vx (SPIRIT1 USB dongle)
The STEVAL-IDS001Vx is a single board that includes the SPIRIT1 radio transceiver and
STM32L microcontroller.
A strip line can be soldered, in B Figure 6, allowing the access to the SWD interface for
programming and debugging and to the 4 GPIOs of the SPIRIT1. The board can be
powered through the USB connector, in A Figure 6, that can also be used for I/O interaction
with a USB Host. The board has also two user buttons for user interaction, in G Figure 6.
This is the list of some of the features that are available on the module:
SPIRIT1 radio transceiver, in D Figure 6.
STM32L151CBU6 48-pin microcontroller, in C Figure 6.
USB connector for power supply and I/O, in A Figure 6.
One row of pins with SWD interface and SPIRIT1's GPIOs, in B Figure 6.
Chip antenna tuned for the entire bands supported (315 MHz, 433 MHz, 868 MHz and
915 MHz), in F Figure 6.
Two user buttons, in G Figure 6.
2 LEDs, in H Figure 6.
Figure 6. STEVAL-IDS001Vx
1.5.1 Microcontroller and connections
The board has an STM32L151CBU6 microcontroller. It's an ultralow power microcontroller
with 128 KB of flash memory, 16 KB of RAM, 32-bit core ARM cortex-M3, 4 KB of data
EEPROM, RTC, timers, USART, I²C, SPI, ADC, DAC and comparators.
The microcontroller is connected to different components like buttons, LEDs and connectors
for external circuitry. The following table shows which functionality is available on each
microcontroller pin.

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Table 2. MCU pin description versus board function
Pin name Pin n°
Board function
LEDs SPIRIT1 Buttons USB SWD Ext.
conn.
VLCD 1 VBAT
PC13 2 SDN_SPIRIT1
PC14 3
PC15 4
OSC_IN 5
OSC_OUT 6
NRST 7 2
VSS_A 8
VDD_A 9
PA0 10
PA1 11 USER_BUTTON_2
PA2 12
PA3 13
PA4 14
PA5 15
PA6 16
PA7 17
PB0 18 USER_LED_2
PB1 19 USER_LED_1
PB2 20 USER_BUTTON_1
PB10 21 GPIO3_SPIRIT1 9
PB11 22
VSS1 23
VDD1 24
PB12 25 SPI1_CS
PB13 26 SPI1_CLK
PB14 27 SPI1_MISO
PB15 28 SPI1_MOSI
PA8 29
PA9 30
PA10 31
PA11 32 USB_DM

Hardware description UM1657
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1.5.2 Extension connector
There is the possibility to solder a strip line connector on the motherboard to access to the
SWD interface for programming and debugging, and to access to the 4 GPIOs of the
SPIRIT1, in B Figure 6.
1.5.3 SWD interface
The SWD interface is available through the pins in B in Figure 6. The SWD interface allows
programming and debugging of the STM32L microcontroller on board, using an in-circuit
debugger and programmer like the ST-LINK/V2. In Figure 7 the connection scheme to how
connect the ST-LINK/V2 with the board pins is showed.
Pin name Pin n°
Board function
LEDs SPIRIT1 Buttons USB SWD Ext.
conn.
PA12 33 USB_DP
PA13 34 SWDIO 3
VSS2 35
VDD2 36
PA14 37 SWCLK 5
PA15 38
PB3 39 SWO/TRACE 4
PB4 40
PB5 41
PB6 42
PB7 43 GPIO0_SPIRIT1 6
BOOT0 44
PB8 45 GPIO1_SPIRIT1 7
PB9 46 GPIO2_SPIRIT1 8
VSS_3 47
VDD_4 48
Table 2. MCU pin description versus board function (continued)

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Figure 7. SWD connection scheme with ST-LINK/V2
The signals available on the STEVAL-IDS001Vx are:
1. GND.
2. VDD.
3. nRESET.
4. SWDIO.
5. SWO/TRACE.
6. SWCLK.
7. SPIRIT1 GPIO0.
8. SPIRIT1 GPIO1.
9. SPIRIT1 GPIO2.
10. SPIRIT1 GPIO3.
The connection with the ST-LINK/V2 interface is the following, as showed in Figure 7:
Table 3. SWD connection
Signal name STEVAL-IDS001Vx pin number ST-LINK/V2 pin number
GND 1 14
VDD 2 2
nRESET 3 15
SWDIO 4 7
SWO/TRACE 5 13
SWCLK 6 9

Hardware description UM1657
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1.5.4 Band
The STEVAL-IDS001Vx has 4 different possible BOM lists, each one optimized for different
RF band as follow:
315 MHz
433 MHz
868 MHz
915 MHz
The chip antenna used supports all these four bands of frequency.
1.5.5 RF connector
The STEVAL-IDS001Vx provides two different RF connections: antenna (chip antenna
tuned for all the supported bands, default configuration) and UFL connector. Although the
default configuration allows communication on air, can be useful switch to the UFL
connector to connect the STEVAL-IDS001Vx to RF equipment as spectrum analyzer or RF
signal generator. To switch from antenna to UFL connector the C9 capacitor must be
removed and the C36 capacitor must be soldered. To restore the default configuration and
use the antenna the C36 capacitor must be removed and the C9 capacitor must be
soldered. In Figure 8, the two pads for C9 and C36 are showed together with the chip
antenna and UFL connector. According to the particular BOM, for each band, the value of
C36 is equals to C9.
Figure 8. RF connector scheme
1.5.6 Push buttons
For user interaction the board has two buttons both available to the application, G in
Figure 6.