UM1037 datasheet(17/46 Pages) STMICROELECTRONICS

17 / 46 page

UM1037

Hardware layout and configuration

Doc ID 18294 Rev 1

17/46

Note:

Jumper JP2 needs to be set correspondingly for IR LED, please refer to Table 1 for details.

2.17

Touch sensing buttons

Two touch sensing buttons, TS1 and TS2, can be connected to the STM8L152M8T6 by

setting the related solder bridges.

Table 11.

IR LED & receiver related Solder Bridges & jumper

Solder bridge/jumper

Description

SB7

LD7 is driven by PA0 through two transistors T1 and T2 when SB7 is set as

pad1 (Dot mark on silkscreen) connected to pad2. With this configuration

the current driven through LD7 is around 40 mA (default setting)

LD7 is driven by PA0 directly when SB7 is set as pad2 connected to pad3.

In this configuration a current of around 10mA through LD7 is driven

directly by the MCU IO PA0.

JP15

IR receiver is connected to PB2 when JP15 is closed. JP15 should be kept

open for motor control application.

Default setting: Fitted

Table 12.

Touch Sensing button related solder bridges

Solder bridge

Description

SB3,4,5

PB4, PB5 and PB6 are connected to LCD glass when solder bridges

SB3,4 and 5 are set to pad1 (Dot mark on silkscreen) connected to pad2

(default setting)

PB4, PB5 and PB6 are connected to Touch sensing buttons when solder

bridges SB3,4 and 5 are set to pad2 connected to pad3.

UM1037 Datasheet(PDF) 17 Page - STMicroelectronics