User`s manual

ROBOT . HEAD to TOE

Product User’s Manual – SKPS

6. HARDWARE INTERFACE

Generally, there are 2 methods of using SKPS. It has been designed for interface to

embedded system with 5V TTL (microcontroller) or connection to computer (normally for

functionality test).

6.1 Microcontroller

One of user’s main concerns when using SKPS is the interface with microcontroller.

a. To begin, user may connect 5V and Gnd of SKPS to microcontroller board. Header

socket can be used to connect SKPS to microcontroller board.

b. Once the 5V is supply to SKPS, the small green LED should light ON and Status LED

will blink. After PS2 is connected, it will stop blink and ON with half brightness.

c. As 2

step, user might need to connect the RX and TX pin to microcontroller. Of course,

these two pins should be cross connected to microcontroller. In other words, RX should

be connected to microcontroller’s Transmitter pin (TxD), while TX should be connected

to microcontroller’s Receiver pin (RxD). No extra component is necessary between these

connections. For details connection, please refer to sample schematic.

d. If configuration of UART is completed, SKPS is ready for embedded development.

Sending and receiving data require software or firmware development on particular

microcontroller.

e. Finally, the RESET pin of SKPS. This is an optional pin for user as there is already a

reset button on SKPS. However, if user would like the microcontroller to reset SKPS

during run time, a transistor is required for interface between microcontroller and SKPS.

Please refer to following schematic for example of microcontroller interfacing with

SKPS.