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Chapter 6. User Circuitry

6.1. Switches

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

Functions

Switch Function Microcontroller

RES When pressed, the MCU board microcontroller is reset. RESn, Pin 133

SW1/BOOT* Connects to an IRQ input for user controls. IRQ0, Pin 57

(Port D, bit 16)

SW2* Connects to an IRQ line for user controls. IRQ1, Pin 58

(Port D, bit 17)

SW3* Connects to an IRQ line for user controls. The same switch may also

function as an ADC trigger input.

IRQ2, Pin 59

(Port D, bit 18)

Table 6-1: Switch Functions

*Refer to the schematic for detailed connectivity information.

6.2. LEDs

There are six LEDs on the MCU 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 I/O port and will light when their corresponding port pin is set

low.

The LED pin references and their corresponding microcontroller port pin connections are shown in Table 6-2: LED Port

LED Reference (As

shown on silkscreen)

Microcontroller Port Pin

function

Microcontroller Pin

Number

Polarity

LED0 Port B bit 12 130 Active Low

LED1 Port B bit 17 98 Active Low

LED2 Port B bit 18 99 Active Low

LED3 Port B bit 19 100 Active Low

Table 6-2: LED Port

6.3. Potentiometer

A single-turn potentiometer is connected to pin AN0 of the microcontroller. This may be used to vary the voltage at this pin between AVCC

and Ground.

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Renesas SH7286 Technical Information Seite 12