Renesas R8C/25 Manual De Usuario

 

Chapter 6.  User Circuitry 

6.1. Switches 

There are four switches located on the RSK. The function of each switch and its connection are shown in Table 6-1.  

   

RES 

When pressed, the RSK microcontroller is reset. 

RESET Pin8 

SW1/BOOT*  Connects to an IRQ input for user controls. 

The switch is also used in conjunction with the RES switch to place 

the device in BOOT mode when not using the E8a debugger. 

INT0 Pin27 

(Port 4, pin 5) 

SW2* 

Connects to an IRQ Interrupt input line for user controls. 

INT1 Pin21 

(Port 1, pin 7) 

SW3* 

Connects to a Key In Interrupt input line for user controls 

KI3 Pin25 

(Port 1, pin 3) 

*Refer to schematic for detailed connectivity information. 

6.2. LEDs 

There are six LEDs on the RSK board. The green ‘POWER’ LED lights when the board is powered. The orange BOOT LED indicates the 

device is in BOOT mode when lit. The four user LEDs are connected to an IO port and will light when their corresponding port pin is set low. 

Table 6-2, below, shows the LED pin references and their corresponding microcontroller port pin connections. 

 

LED0  

Green 

Port 2.4 

16 

LED1 Orange 

Port 

2.5 

15 

LED2 Red 

Port 

2.6 

14 

LED3 Red 

Port 

2.7 

13 

6.3. Potentiometer 

A single turn potentiometer is connected to AN8 (P1.0) of the microcontroller. This may be used to vary the input analogue voltage value to 

this pin between VREF and Ground. 

 

 

 

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