Hardware and layout

UM0970

12/30

Doc ID 17693 Rev 2

3.2.1

Using the ST-Link to program/debug the STM8L on board

To program the STM8L on board, simply plug in the two jumpers on CN3, as shown in

Figure 8 in red, but do not use the CN2 connector as that could disturb communication with

the STM8L152C6T6 of the STM8L-DISCOVERY.

Figure 8.

STM8L-DISCOVERY connections image

3.2.2

Using the ST-Link to program/debug an external STM8L application

It is very easy to use the ST-Link to program the STM8L on an external application. Simply

remove the 2 jumpers from CN3 as shown in Figure 9, and connect your application to the

CN2 debug connector according to Table 3.

Jumpers on CN3

Table 3.

Debug connector CN2 (SWIM)

Pin

CN2

Designation

1

VDD_TARGET

VDD from application

2

SWIM

SWIM data input/output

3

GND

Ground

4

SWIM_RST

SWIM reset