UM1075 Rev 10 9/20
UM1075 Hardware configuration
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4.1 Connection with STM8
For the development of applications based on STM8 microcontrollers, the ST-LINK/V2 can
be connected to the target board by two different cables, depending upon the connector
available on the application board.
These cables are:
• A SWIM flat ribbon with a standard ERNI connector at one end
• A SWIM cable with two 4-pin, 2.54 mm connectors or SWIM separate-wire cables
4.1.1 Standard ERNI connection with SWIM flat ribbon
Figure 5 shows how to connect the ST-LINK/V2 if a standard ERNI 4-pin SWIM connector is
present on the application board.
Figure 5. ERNI connector
1. A = Target application board with ERNI connector
2. B = Wire cable with ERNI connector at one end
3. C = STM8 SWIM target connector
4. See Figure 11
Figure 6 shows that pin 16 is missing on the ST-LINK/V2-ISOL target connector. This
missing pin is used as a safety key on the cable connector, to guarantee the correct position
of the SWIM cable on the target connector even pins used for both SWIM and JTAG cables.
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