PIC32MX470 Curiosity Development Board User’s Guide
DS70005283B-page 20 2016-2017 Microchip Technology Inc.
2.1.6 LEDs
Four user-programmable LEDs are available on the PIC32MX470 Curiosity
Development Board, and these LEDs can be turned ON/OFF using the connected
GPIO pins. Table 2-4 provides details of the LEDs and related GPIO pins.
The RGB LEDs (LED4) are connected to the re-mappable pins with an output compare
functionality to control the color and brightness with PWM output. In the RGB LED, red
is the component of the GPIO pin RB10, green is the component of the GPIO pin RB3,
and blue is the component of the GPIO pin RB2.
TABLE 2-4: LEDS
2.1.7 Oscillator Options
A 20 MHz crystal (X2) is connected to the on-board PIC32MX470F512H microcontrol-
ler for precision clocking. The 12-Mbps USB full-speed signal rate specification
requires ±0.25% or 2500 ppm clock accuracy. Therefore, an external crystal is required
to meet the clock accuracy requirement for USB. Non-USB applications can use the
internal RC oscillators.
The PIC32MX470 Curiosity Development Board also has provision for an external
secondary 32 kHz oscillator (Y3); however, this component is not populated.
2.1.8 mikroBUS™ Sockets
Two mikroBUS sockets (J5, J10) are available on the development board, and these
sockets can be used to expand the functionality using the MikroElectronika Click
adapter boards. The mikroBUS connector consists of two 1x8 female headers with SPI,
I
2
C, UART, RST, PWM, analog, interrupt lines as well as 3.3V, 5V, and GND power
lines.
The GPIO pins for the mikroBUS sockets are assigned to route, as follows:
• UART1, I2C1, SPI1 and OC1 peripheral instances to mikroBUS socket J5. The
UART1 and SPI1 peripherals are also routed to the BM64 Bluetooth 4.2 Stereo
Audio module.
• UART2, I2C2, SPI2 and OC2 peripheral instances to mikroBUS socket J10. The
UART2, I2C2, and SPI2 peripherals are also routed to the X32 audio header.
2.1.9 X32 Audio Header
The PIC32MX470 Curiosity Development Board includes two X32 headers (J14, J15)
to enable a connection to the Microchip Audio Codec daughter board. Ta ble 2- 5
provides the details of the available daughter board and for additional information,
contact your local Microchip sales office.
For a complete list of currently available audio daughter boards, visit the
microchipDIRECT web site (www.microchipdirect.com).
TABLE 2-5: AUDIO DAUGHTER BOARD
LED Name Microcontroller Pin
LED1 (red)
RE4
LED2 (yellow) RE6
LED3 (green) RE7
LED4 (RGB LEDs - red, green, blue) RB10, RB3, RB2
Daughter Board Name Microchip Part Number
PIC32 Audio Codec Daughter Board - AK4642EN
AC320100
