DocID025514 Rev 1

11/19

AN4396

Harvesting module connectors

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Harvesting module connectors

The STEVAL-ISV021V1 provides a set of connectors for the input sources which are

described below:



CN1 (2-pin connector)

This connector is provided to supply the SPV1050 device by a supply source alternative to

the on-board PV panel.

The J4 must be open before an external source is connected to the CN1. For the proper

selection of the external source, please refer to the datasheet of the SPV1050 device.



J25 (16-pin extension connector).

It can be used to connect the harvesting module to an external load such as a wireless

sensor node module.

–

LDO1_EN CONTROL (input): it provides the connection to an external signal that

controls the LDO1_EN pin. In this case the SW1 must be left open. If the LDO1 is

not used, the LDO1_EN pin has to be connected to ground.

–

LDO2_EN CONTROL (input): it provides the connection to an external signal that

controls the LDO2_EN pin. In this case the SW2 must be left open. If the LDO2 is

not used, the LDO2_EN pin has to be connected to ground.

–

BATT_CHG (output): battery charge status pin.

This is an open drain pin that has to be pulled up by a resistor (10 M

 typical) to

–

BATT_CONN (output): battery connection status pin.

This is an open drain pin that has to be pulled up by a resistor (10 M

 typical) to

–

LDO2: LDO2 (3.3 V) output voltage pin.

–

LDO1: LDO1 (1.8 V) output voltage pin.

–

GND: ground pin of the extension board.



J27 (16-pin monitoring connector)

It provides the connection to the power monitoring board.

Table 2. CN1 connector

CN1 pin number

12

Signal

SOURCE +

SOURCE -

Table 3. J25 connector

J25 pin number

1 - 2

3 - 4

5 - 6

7 - 8

9 - 10

11 - 12

13 - 16

SPV1050

pin signal

LDO1_EN

CONTROL

LDO2_EN

CONTROL

BATT_CHG BATT_CONN

LDO2

LDO1

GND