Renesas H8SX/1668R User Manual

 

Chapter 6.  User Circuitry 

6.1. Switches 

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

RES 

When pressed, the RSK microcontroller is reset. 

RESn, Pin 91 

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 E10A debugger. 

IRQ0n, Pin 84 

(Port 1 pin 0) 

SW2* 

Connects to an IRQ line for user controls. 

IRQ1n, Pin 85 

(Port 1, pin 1) 

SW3* 

Connects to the ADC trigger input. Option link allows connection to IRQ line. 

The option is a pair of 0R links. For more details on option links, please refer 

to Sec 6.6.

 

IRQ3n_ADTRGn, 

Pin 87 

(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 B.3 

3 

LED1 Orange 

Port 

C.2 116 

LED2 Red 

Port 

C.3 117 

LED3 Red 

Port 

1.2 86 

6.3. Potentiometer 

A single turn potentiometer is connected to channel AN0 (P5.0, pin 118) of the microcontroller. This may be used to vary the input analog 

voltage value to this pin between AVCC and Ground. 

6.4. Serial port 

Serial port SCI0 is connected to the standard RS232 header. Serial port SCI5 can optionally be connected to the RS232 header. The 

connections to be fitted are listed in the Table 6-3. 

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