Connecting an external microcontroller to evaluation board

UM0460

22/23

Appendix D

Connecting an external microcontroller to

evaluation board

A jumper JI has been provided on the board for probing the important signals of the board

(see Appendix B). This jumper can be used to connect an external microcontroller with the

evaluation board. Follow the steps below to connect an external microcontroller with the

evaluation board:

1.

Remove (desolder) the microcontroller ST7FLITE39F2 (U2) from the board.

2.

Connect pin number 1 (DIN/DOUT) of jumper J1 to pin DIN/DOUT of the external

microcontroller from which data and commands will be sent to the device STLED316S

(U3).

3.

Connect pin number 2 (CLK) of jumper J1 to pin CLK of the external microcontroller

from which the clock signal will be sent the device STLED316S (U3).

4.

Connect pin number 3 (STB) of jumper J1 to pin STB of the external microcontroller

from which the control signal (STROBE) will be sent the device STLED316S (U3).

5.

Connect pin number 4 (IRQ_N) of jumper J1 to pin IRQ_N of the external

microcontroller which is configured as interrupt input and will receive the interrupt

signals coming from the device STLED316S (U3).

6.

Connect pin number 7 (GND) of jumper J1 to the GND pin of the external

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

Note:

1

The pins of the external microcontroller should have been configured properly as being

mentioned in the datasheet of the device STLED316S.

2

The operation of the board will depend on the software loaded in the memory of the external

microcontroller.

3

The setup will not be able to have ICC communication with the external microcontroller

using the jumper J3.

4

The RESET switch of the board does not work when the external microcontroller is used.

4

Revision history

Table 3.

Document revision history

Date

Revision

Changes

03-Jan-2008

1

Initial release