Board description

AN4397

16/19

DocID025515 Rev 1

5

Board description

The STEVAL-ISV020V1 board has a full set of connectors, jumpers and switches as

described below:





LDO2: connect this pin to the load to be supplied at 3.3 V.



LDO1: connect this pin to the load to be supplied at 1.8 V.



BATT-CON: output logic pin for battery connection monitoring.



Please notice that this is an open drain pin, which has to be pulled up by a resistor

(typically 10 M



BATT-CHG: output logic pin for battery charging status monitoring.



Please notice that this is an open drain pin, which has to be pulled up by a resistor

(typically 10 M



LDO1_EN: input logic pin to enable/disable the LDO1. Connect this pin to the control

signal from the microcontroller.



LDO2_EN: input logic pin to enable/disable the LDO2. Connect this pin to the control

signal from the microcontroller.

Table 2. CN1 connector

CN1 pin number

12

Signal

INPUT+

INPUT-

Table 3. CN2 connector

CN2 pin number

1

23456

7

8

SPV1050

pin signal

GND

LDO2

GND

LDO1

GND

BATT-CON BATT-CHG

Table 4. CN3 connector

CN3 pin number

1

234

SPV1050 pin signal

LDO1_ENGND

GNDLDO2_EN