UM1037 datasheet(8/46 Pages) STMICROELECTRONICS

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Hardware layout and configuration

UM1037

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Doc ID 18294 Rev 1

The LED LD8 is lit when the STM8L1528-EVAL evaluation board is powered by the 5 V

correctly, LED LD6 will be lit when MCU is powered by low voltage (VDD < 1.8 V).

Note:

The recommended AC220V to DC5V power adapter is the PSU-5V2A. It is not included with

the board but can be ordered from ST as a separate item. You can also use another

equivalent 5V power adapter (polarity compatible with CN12) to power STM8L1528-EVAL

board via the CN12 power jack on the board.

Table 2.

Power related jumpers

Jumper

Description

Jumper setting

JP13

(selects one of

the three possible

power supply

resources)

For power supply jack (CN12) to the STM8L1528-EVAL only,

JP13 is set as shown to the right.

For power supply from the daughter board connectors (CN4)

to STM8L1528-EVAL only, JP13 is set as shown to the right:

For power supply from ST-LINK/V2 connector (CN9) to

STM8L1528-EVAL only, JP13 is set as shown to the right:

(Default Setting)

For power supply from power supply jack (CN12) to both

STM8L1528-EVAL and daughter board connected on CN3 and

CN4, JP13 is set as shown to the right (daughter board must

not have its own power supply connected)

JP14

VDD is connected to fixed +3.3V DC power when JP14 is set

as shown (default setting).

VDD is connected to adjustable DC power from 1.65 V to 3.6 V

when JP13 is set as shown.

JP4

VDD power is directly connected to MCU VDD when JP4 is set

as shown (default setting).

Note: For manual IDD measurement the jumper on JP4 must

be removed and replaced by an ammeter connected between

pin 2 and 3 of JP4.

Connect VDD power to MCU with current-sampling resistor,

2 Ohm or 2 KOhm, in series for IDD current measurement

when JP4 is set as shown to the right.

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