ST STM32L152RCT6 Discovery kit User manual

January 2017 DocID018789 Rev 4 1/38
1
UM1079
User manual
Discovery kits with STM32L152RCT6
and STM32L152RBT6 MCUs
Introduction
The STM32L152RCT6 Discovery kit (32L152CDISCOVERY) and the STM32L152RBT6
(STM32L-DISCOVERY) allow to develop applications based on the STM32L1 Series and to
benefit from the ultra-low-power features of these microcontollers.
The 32L152CDISCOVERY is based on an STM32L152RCT6 (256 Kbytes of Flash
memory). The STM32L-DISCOVERY is based on an STM32L152RBT6 (128 Kbytes of
Flash memory).
These discovery kits include the ST-LINK/V2 in-circuit debugger, one LCD (24 segments, 4
commons), four LEDs, two pushbuttons, one linear touch sensor and four touchkeys.
Figure 1. 32L152CDISCOVERY board
1. Picture is not contractual.
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Contents UM1079
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Contents
1 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Development toolchain supporting the 32L152CDISCOVERY . . . . . . . . . 7
2.5 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Hardware and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 STM32L152RCT6 microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.2 Embedded ST-LINK/V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2.1 Using the ST-LINK/V2 to program/debug the microcontroller on board 14
4.2.2 Using the ST-LINK/V2 to program/debug an external application . . . . . 15
4.3 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5 Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Linear touch sensor / touchkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.7 Built-in IDD measurement circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7.1 High IDD range mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.2 Low IDD range mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.3 IBIAS current measurement procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9 LCD (24 segments, 4 commons) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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UM1079 Contents
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8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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List of tables UM1079
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List of tables
Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 2. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Functions executed when clicking B1 button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Jumper states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 5. Debug connector CN2 (SWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 6. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 7. LCD connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 8. MCU pin description versus board function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 9. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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DocID018789 Rev 4 5/38
UM1079 List of figures
5
List of figures
Figure 1. 32L152CDISCOVERY board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3. Top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4. Bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. STM32L152RCT6 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. STM32L152RCT6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Typical configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. 32L152CDISCOVERY connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. ST-Link connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 10. IDD measurement circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 11. Low IDD range measurement timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 12. LCD segment mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 13. Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 14. 32L152CDISCOVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 15. ST-LINK/V2 (SWD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 16. MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 17. LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 18. IDD measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 19. Linear touch sensor/touchkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
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Ordering information UM1079
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1 Ordering information
To order the 32L152CDISCOVERY ultra-low-power discovery board, refer to Table 1.
2 Conventions
Table 2 provides some definitions used in this user manual.
The following sections of this user manual are also applicable to the STM32L-DISCOVERY
except specific features of the STM32L152RBT6 microcontroller (128 Kbyte Flash memory,
16 Kbyte RAM, 4 Kbyte data EEPROM).
2.1 Quick start
Before using the discovery kit, please accept the Evaluation product license agreement
available on the 32L152CDISCOVERY page of the www.st.com/mcu web site.
2.2 Getting started
The following sequence allows to configure the 32L152CDISCOVERY and to launch the
discovery application:
•Check jumper positions on the board: JP1 and CN3 must be ON (discovery selected)
(see Figure 3).
•Connect the 32L152CDISCOVERY to a computer with an USB cable to power the
board. The red LEDs LD2 (PWR) and LD1 (COM) are lit up.The Function 1 is executed.
•Click on user button B1 to change the executed function as described in Table 3. The
4-LED bar shows the function being performed (1 to 4 bars can be switched ON).
Table 1. Ordering information
Part number Order code Description
32L152CDISCOVERY STM32L152C-DISCO Discovery kit based on STM32L152RCT6
STM32L-DISCOVERY STM32L-DISCOVERY(1)
1. STM32L-DISCOVERY is replaced by STM32L152C-DISCO.
Discovery kit based on STM32L152RBT6
Table 2. ON/OFF conventions
Convention Definition
Jumper JP1 ON Jumper placed between pin 2 and 3
Jumper JP1 OFF Jumper placed between pin 1 and 2
Solder bridge SBx ON SBx connections closed by solder
Solder bridge SBx OFF SBx connections left open
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DocID018789 Rev 4 7/38
UM1079 Conventions
37
Depending on the function selected, the voltage value, the linear touch sensor position, the
touchkeys status or the STM32L152RCT6 current consumption is displayed on the LCD.
Please refer to the www.st.com/mcu web site for more details on the discovery project and
the STM32L152RCT6 features.
2.3 System requirements
•Windows PC (XP, Vista, 7)
•USB type A to Mini-B USB cable
2.4 Development toolchain supporting the 32L152CDISCOVERY
•Altium TASKING®VX-Toolset
•Atollic®TrueSTUDIO®
•IAR™ EWARM
•Keil™ MDK-ARM
Table 3. Functions executed when clicking B1 button
Func
tion LED LD3/4 Bar status Value displayed on LCD Main function
1LD3 and
LD4 blink Measured STM32L152RCT6 VDD voltage Voltage measurement
2 LD3 ON Linear touch sensor position from 0 to 100%
Touch sensing
3 LD4 ON Status of the four touchkeys
4
LD3 and
LD4 OFF
STM32L152RCT6 consumption measured in Run mode
(4 MHz)
STM32L152RCT6
current consumption
measurement
STM32L152RCT6 consumption measured in Sleep mode
(4 MHz)
5
STM32L152RCT6 consumption measured in Run mode
(32 KHz)
STM32L152RCT6 consumption measured in Low-power
sleep mode (32 KHz)
6
STM32L152RCT6 consumption measured in Stop mode,
RTC ON
STM32L152RCT6 consumption measured in Stop mode,
RTC OFF
7 STM32L152RCT6 consumption measured in Standby mode
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Features UM1079
8/38 DocID018789 Rev 4
2.5 Demonstration software
The demonstration software, preloaded in the board Flash memory, uses the built-in IDD
measurement feature to automatically measure and display the MCU consumption on the
LCD (in Run and Low-power modes).This software also allows to demonstrate touch
sensing functionalities such as linear touch sensor or touchkeys.
The latest version of this demonstration source code and associated documentation can be
downloaded from www.st.com/mcu
3 Features
The 32L152CDISCOVERY offers the following features:
•An STM32L152RCT6 microcontroller (256 Kbyte Flash memory, 32 Kbyte RAM,
8 Kbyte data EEPROM) in a 64-pin LQFP package
•On-board ST-LINK/V2 with selection mode switch to use the kit as a standalone
ST-LINK/V2 (with SWD connector for programming and debugging)
•Board power supply: through USB bus or from an external 3.3 or 5 V supply voltage
•External application power supply: 3 V and 5 V
•IDD current measurement
•LCD
– DIP28 package
– 24 segments, 4 commons
•Four LEDs:
– LD1 (red/green) indicating USB communication
– LD2 (red) indicating that 3.3 V power supply is ON
– Two user LEDs, LD3 (green) and LD4 (blue)
•Two pushbuttons (user and reset)
•One linear touch sensor and four touchkeys
•An extension header for LQFP64 I/Os for quick connection to prototyping board and
easy probing
The STM32L-DISCOVERY offers the same features except an STM32L152RBT6
microcontroller (128 Kbyte Flash memory, 16 Kbyte RAM, 4 Kbyte data EEPROM) in a 64-
pin LQFP package.
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DocID018789 Rev 4 9/38
UM1079 Hardware and layout
37
4 Hardware and layout
The 32L152CDISCOVERY is designed around one STM32L152RCT6 packaged in an
LQFP64.
Figure 2 illustrates the connections between the STM32L152RCT6 microcontroller and its
peripherals (ST-LINK/V2, pushbuttons, LEDs, LCD, linear touch sensor, touchkeys, and
connectors). These connections are the same for the STM32L-DISCOVERY.
Figure 2. Hardware block diagram
Figure 3 and Figure 4 allow to locate these features on the board.
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Hardware and layout UM1079
10/38 DocID018789 Rev 4
Figure 3. Top layout
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