ST STM8L101-EVAL User manual

November 2009 Doc ID 15312 Rev 2 1/26
UM0629
User Manual
STM8L101-EVAL
evaluation board
Introduction
The STM8L101-EVAL is composed of two boards:
■An STM8L1/L2 motherboard called MB709 which includes all peripherals which are
connected to the MCU on the daughterboard. The motherboard connects to the
daughterboard via two 36-pin connectors.
■An STM8L1 daughterboard called MB710 which has an STM8L101 MCU.
The motherboard and daughterboard are a complete development platform for
STMicroelectronic's STM8L101 microcontroller with comparator, I2C, SPI, USART and
SWIM debugging support.
The full range of hardware features on the STM8L101-EVAL helps you to evaluate all
peripherals (MicroSD cardTM, USART, EEPROM, LCD, for example) and develop your own
applications.
Figure 1. STM8L101-EVAL board
www.st.com
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Contents UM0629
2/26 Doc ID 15312 Rev 2
Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 STM8L1/L2 motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Reset source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 RS-232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6 MicroSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7 Analog input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.8 Development and debug support CN5 and CN6 . . . . . . . . . . . . . . . . . . . 10
2.9 Display and input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.10 Bi-color LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.11 Economic measurement and potentiometer RV1 . . . . . . . . . . . . . . . . . . . 11
2.12 MicroSD connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.13 Daughterboard extension connectors CN3 and CN4 . . . . . . . . . . . . . . . . 13
2.14 SWIM connectors CN5 and CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.15 RS-232 connector CN8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.16 Audio jack CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.17 Power connector CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 STM8L1 daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Extension connector CN1 and CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 STM8L1/L2 motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 STM8L1-DB daughterboard schematic . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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UM0629 Contents
Doc ID 15312 Rev 2 3/26
Appendix A STM8L101-EVAL I/O assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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Overview UM0629
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1 Overview
1.1 Features
■5 V power jack supply
■Audio play
■MicroSD cardTM
■64 Kbit I2C EEPROM
■One channel of RS-232 communication
■Bi-color LED
■Economic analog voltage measurement based on comparator
■SWIM debug support
■122 x 32 dot-matrix serial interface LCD module
■Joystick with 4-direction control and selector
■Reset and User button
■3 LEDs
■Extension connector for daughterboard
■One 10 K potentiometer
■RoHS compliant
1.2 Demonstration software
Demonstrationsoftware is preloaded in the board’s Flash memory for easy demonstration of
device peripherals in stand-alone mode. For more information and to download the latest
version available, refer to STM8L101-EVAL demonstration firmware available on web:
www.st.com/mcu.
1.3 Order code
To order the STM8L101K3 evaluation board, use the order code STM8L101-EVAL.
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UM0629 Overview
Doc ID 15312 Rev 2 5/26
1.4 Hardware layout and configuration
The STM8L101-EVAL evaluation board is designed around the STM8L101K3T6 in an
LQFP32 package.
Figure 2 illustrates the connections between the daughterboard and the peripherals on the
motherboard (LCD, I2C EEPROM, USART, audio and MicroSD card).
Figure 3 and Figure 4 help you to locate these features on the actual evaluation board.
Figure 2. Hardware block diagram
STM8L1/L2-MB
RS232
transceiver
5V power
jack
3.3V
regulator
LCD
MicroSD card
Level
translator
Audio circuit
BNC connector
I2C EEPROM
SWIM connector
STice connector
Push button
Joystick
LED’s
Potentiometer
RS232
connector
SWIM
GPIO’s
ADC
ADC
PWM
USART
Compa
rator
SPI
I2C
Economic
Measurement
BEEP
1.8 to 3.3V
regulator
Bi-color LED
GPIO’s
Extension connector
STM8L1-DB
STM8L1/L2-MB (MB709)
STM8L101
MCU
STM8L1-DB (MB710)
CMP
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Overview UM0629
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Figure 3. STM8L1/L2 motherboard layout
RV4
MCU_VDD
CN9
Audio jack
CN1
Micro
RV1
Potentiometer
B1
RESET U7 Joystick B2 KEY
U2
Dot-matrix LC
D
CN5
SWIM
adjustment
CN8
USART
CN10
5V power
CN3, CN4 daughterboard connectors
SD card™
CN6
SWIM
alternative)
(ERNI cable
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UM0629 Overview
Doc ID 15312 Rev 2 7/26
Figure 4. STM8L1 daughterboard layout
CN1, CN2 motherboard connector
STM8L101 MCU in LQFP32 package
soldered directly onto the board
and footprint for socket (ref ENPLAS OTQ-32-0.8-02) is present on the board
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STM8L1/L2 motherboard UM0629
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2 STM8L1/L2 motherboard
This motherboard is designed to work with an STM8L1 daughterboard.
2.1 Power supply
The motherboard is designed to be powered by a 5 V DC power supply and to be protected
from a wrong power plug-in event by PolyZen Inc. (auto rearmable fuse) U13. It is possible
to configure the evaluation board to provide 5 V power to the daughterboard through the
daughterboard connector.
●The motherboard is powered by a 5 V DC power adapter connected to CN10, the
power jack on the board (PSU on silk screen for power supply unit).
●5 V DC power is provided to the daughterboard through an extension connector and
can be set by jumper JP12 (DTB for daughterboard on silk-screen).
●MCU_VDD can be selected by setting jumper JP11 and is connected to the
daughterboard directly through the daughterboard connector.
The power supply is configured by setting the jumpers JP11 and JP12 as described in
Table 1.
The LED LD6 is lit when the motherboard is powered correctly. JP3 is no longer used.
Table 1. Power related jumpers
Jumper Description Setting
JP12
5 V power from power supply jack (CN10) is connected to the motherboard
when JP12 is set as shown to the right:
(default setting).
5 V power from power supply jack (CN10) is connected to the daughterboard
when JP12 is set as shown to the right:
In this case the motherboard and daughterboard are powered by a 5 V power
supply.
JP11
MCU_VDD is powered by a fixed 3.3 V power supply when JP11 is set as
shown to the right:
(default setting).
MCU_VDD is powered by a variable power supply from 1.8 V to 3.3 V,
adjusted by potentiometer RV4 (bottom left of the board), when JP11 is set as
shown to the right:
PSU DTB PSU
DTB
1
1
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UM0629 STM8L1/L2 motherboard
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2.2 Reset source
The reset signal of the motherboard is low active. Reset sources include:
●Reset button B1.
●Debugging tools from connectors CN5, CN6.
The reset pin PA1 of the STM8L101 is either connected to the reset button B1 or to GND by
the setting of jumper JP1:
2.3 Audio
The motherboard supports both audio recording and playback, but audio recording
components (U11 microphone and U12 amplifier) cannot be used with the STM8L101.
The speaker can be disabled or enabled by the setting of jumper JP10.
Audio volume can be adjusted using the potentiometer RV2.
Table 2. Reset related jumpers
Jumper Description Setting
JP1
PA1 is connected to GND when JP1 is set as shown to the right:
This configuration is reserved for internal use only.
PA1 is connected to Reset button when JP1 is set as shown to the right:
(default setting).
This jumper position is called Alone on the silk-screen.
1 2 3
1 2 3
Table 3. Audio related jumpers
Jumper Description Setting
JP10 Audio power amplifier TS4871 is forced on standby mode when JP10 is
not fitted.
Default setting: fitted.
JP9
Either beeper or PWM output can be selected as a source of speaker
by setting jumper JP9.
The beeper is connected to speaker when JP9 is set as shown to the
right: (Beep position on the silk-screen).
The PWM output is connected to speaker when JP9 is set as shown to
the right: (PSW position on the silk-screen) (default setting).
1 2 3
1 2 3
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STM8L1/L2 motherboard UM0629
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2.4 I2C EEPROM
A 64 Kbit I2C EEPROM is connected to the I2C port of the STM8L101.
Write protection can be enabled by the setting of jumper JP8.
2.5 RS-232
One D-type 9-pin RS-232 connector CN8 is available on the motherboard.
RS-232 interface behavior is not guaranteed when the MCU is powered by an adjustable
voltage lower than 3 V.
Note: To communicate with an RS-232 port on a PC, a 9-pin straight RS-232 cable (direct pin to
pin connection) is needed because:
● On CN8 the RX signal is connected on pin2 and the TX data on pin 3,
● On the PC side the RX signal is generally on pin 3 and the TX signal on pin 2.
This standard 9-pin straight RS-232 cable is not provided with the board. Refer to
Section 2.15 for details on RS-232 connector pinout.
2.6 MicroSD card
The 1GByte (or more) MicroSD card connected to the SPI of the STM8L101 through a
voltage level translator U1 (shared with LCD) is available on the board. MicroSD card chip
select is managed by standard I/O port PB4.
2.7 Analog input
The BNC connector footprint present on the board (CN7) cannot be used as it is not
connected to the MCU.
2.8 Development and debug support CN5 and CN6
The two debug connectors are available on the motherboard.
●CN5, ERNI 4-pin connector (reference 284697 or 214017) for SWIM debugging. It fits
with ERNI connectors provided with standard tools.
●CN6, 2.54 mm pitch low-cost 4-pin connector for SWIM debugging.
Table 4. I2C EEPROM related jumpers
Jumper Description
JP8 I2C EEPROM U6 is protected from write operation when JP8 is not fitted.
Default setting: Fitted
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