Daughterboard Power Supply; Swim Connections - ST STM8S User Manual

UM0671
3.1.3
3.1.4
Note:
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Daughterboard power supply

By default, the daughterboard is powered through the motherboard. The 3.3 V regulator on
the daughterboard supplies the daughterboard MCU.
The MCU current consumption (I

SWIM connections

The STM8 debug system interface allows a debugging or programming tool to be connected
to the MCU through a single-wire bidirectional communication based on open-drain line.
This single-wire interface module (SWIM) module allows non-intrusive read/write accesses
to be performed on-the-fly to the RAM and peripheral registers, for debug purposes.
The SWIM module can also perform a MCU device software reset and can also be used by
as a standard I/O port with some restrictions.
Jumper W1 is used to configure SWIM settings as described in
Table 3. W1 jumper description
Configuration
1 2 3
Uses STM8S TS daughterboard SWIM connector (default setting)
1 2 3 Connect PD1of STM8S TS daughterboard device to resource of STM8S/128-
EVAL board.
For more information, please refer to user manual UM0470: STM8 SWIM communication
protocol and debug module.
Figure 6. SWIM connector (top view)
Table 4. SWIM connector pin description
Pin number Description
1 VDD
3 GND
The SWIM connector of the STM8/128-EVAL board cannot be used.
) can be measured by removing jumper W2.
DD
Description
1 2 3 4
Pin number
2
4
Doc ID 15330 Rev 4
Evaluation kit board settings
Table 3.
Description
PD1
PA0 (RESET)
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