Connecting an external microcontroller to the demonstration board

UM0756

20/28

Doc ID 16031 Rev 1

5

Connecting an external microcontroller to the

demonstration board

Jumper J3 has been provided on the board for probing the important output signals of the

board (see Section 6). This jumper can be used to connect an external microcontroller to the

demonstration board. The following steps should be followed when connecting an external

microcontroller to the demonstration board:

●

Remove (de-solder) the STM8S207K6 microcontroller (U1) from the board.

●

Connection the STLED316S device:

–

Connect pin 1 (PC1_DIN/DOUT) of jumper J3 to the pin of the external

microcontroller using the data and commands that are to be sent to the

STLED316S device (U8)

–

Connect pin 2 (PC2_CLK) of jumper J3 to the pin of the external microcontroller

using the clock signal that is to be sent to the STLED316S device (U8).

–

Connect pin 3 (PC3_STB) of jumper J3 to the pin of the external microcontroller

using the control signal (STROBE) that is to be sent the STLED316S device (U8).

–

Connect pin 4 (PC4_IRQ) of jumper J3 to the pin of the external microcontroller

which is configured as interrupt input and is to receive the interrupt signals coming

from the STLED316S device (U8).

●

Connection to the touch screen controller(STMPE1208S):

–

microcontroller.

–

microcontroller.

–

Connect pin 7 (PB3_TINT) of jumper J3 to the pin of the external microcontroller

which is configured as interrupt input and is to receive the interrupt signals coming

from the STMPE1208S device (U2).

–

Connect pin 8 (PB2_TRESET) of jumper J3 to the pin of the external

microcontroller which is configured as push-pull output and is to be used to reset

the STMPE1208S device (U2).

●

Connection for standby feature:

–

Connect pin 9 (PD4_STBY_INTR) of jumper J3 to the pin of the external

microcontroller which is to provide the standby interrupt to the other host system.

–

Connect pin 10 (PD5_STBY_SW) of jumper J3 to the interrupt pin of the external

microcontroller which is to take the switch input from the STBY switch (SW2).

●

Connection for power management

–

Connect pin 11 (GND) of jumper J3 to the GND pin of the external microcontroller

to create a common ground level (reference) for the whole system.

–

Connect pin 12 (5V0) of jumper J3 to the VDD pin of the external microcontroller.

Note:

The pins of the external microcontroller must be configured as described in the datasheet of

the STLED316S and STMPE1208S devices.

The working of the board depends on the software being loaded in the memory of the

external microcontroller.

The setup cannot perform the SWIM communication with the external microcontroller using

the jumper J3.