UM1037 datasheet(14/46 Pages) STMICROELECTRONICS

14 / 46 page

Hardware layout and configuration

UM1037

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Doc ID 18294 Rev 1

10K ohm potentiometer RV2 connected to PC7.

IDD measurement output signal connected to PF3 for MCU power consumption test.

External ADC input which can be connected to TP1 (AIN+) and TP2 (AIN-), solder

bridge SB1 should be kept open for this Analog input.

The LCD glass module has to be mounted on the "IO" position for potentiometer RV2. Refer

to Section 2.5: LCD glass module on page 10 for details.

2.12

Serial Flash

An M25P128 Serial Flash is connected to the SPI bus of the STM8L152M8T6. The chip

select is managed by standard IO port PH7.

2.13

Temperature sensor

An STLM75M2E temperature sensor is connected to the I2C bus of the STM8L152M8T6

through two transistors to support a wide voltage range from 1.65 V to 3.3 V on the I2C bus.

The device address of the temperature sensor can be changed by setting solder bridge

SB13. the address is 0x90 when SB13 is open while address is 0x91 when SB13 is closed.

The LCD glass module has to be mounted in "IO" position for I2C_SMB signal. Refer to

Section 2.5: LCD glass module on page 10 for details.

2.14

Display and input devices

The 122x32 dot-matrix LCD is connected to the SPI port of the STM8L152M8T6, 4 general

purpose color LED's (LD 1,2,3,4), and one bi-color LED LD5 are available as display

devices. A 4-direction joystick (U28) with selection key, an anti-tamper button (B2) and a

general purpose button (B3) are available as input devices.

Table 9.

Serial Flash related jumper

Jumper

Description

JP10

All SPI interface devices, microSD card, SPI Flash and LCD are connected

to SPI_MISO of STM8L152M8T6 when JP10 is closed. JP10 should be

kept open for SPI bootloader operation.

Default setting: Fitted

Table 10.

LCD module (122x32 dot-matrix LCD U26)

Pin no.

Signal

Description

Pin no.

Signal

Description

1Vss

GND

SID

PI2

Vcc

+3.3V

PF2

3VO

+5V

4CLK

PI1

GND

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