UM2179 datasheet(22/48 Pages) STMICROELECTRONICS

22 / 48 page

Hardware layout and configuration

UM2179

22/48

UM2179 Rev 9

The 5 V power source is selected by the jumper JP6 as shown in Table 7.

Table 6. External power sources

Input power

name

Connector

pins

Voltage

range

Max current

Limitation

VIN

CN8 pin 15

CN11 pin 24

7 V to 12 V

800 mA

From 7 V to 12 V only and input

current capability is linked to input

voltage:

– 800 mA input current when

VIN=7 V

– 450 mA input current when

7V<VIN<9V

– 250 mA input current when

9 V<VIN<12 V

E5V

CN11 pin 6

4.75 V to

5.25 V

500 mA

+3.3 V

CN8 pin 7

CN11 pin 16

3 V to 3.6 V

Two possibilities:

–ST-LINK PCB is cut

– SB3 and SB111 OFF (ST-LINK not

powered)

Table 7. Power related jumper

Jumper

Description

JP6

STLK (ST-LINK VBUS) is used as power source when JP6 is set as shown on the

right (Default setting)

E5V is used as power source when JP6 is set as shown on the right:

CHGR (USB Charger on CN1) is used as power source when JP6 is set as shown

on the right:

VIN is used as power source when JP6 is set as shown on the right:

E5V STLK CHGR VIN

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