Datasheet

20) Programming Selector Indicator LEDs

The Propeller Activity Board WX has two available programming sources: the USB port and the wireless

communication module socket.

The programming selection indicator LEDs light to indicate which communication source has been

selected for programming and bidirectional serial communication with the host computer (wireless or

USB). For information about selecting the programming source, see 11) WX Wireless Access &

Communication Header, p. 4, and 15) USB Port, p. 5.

Propeller I/O Pin Assignments

I/O Pin

Function

P0–P15

General-purpose I/O access alongside the breadboard

P12–P17 3-pin header signal pins — this is the servo port header above the breadboard

P18–P21 Analog to digital converter

P22

microSD card DO (data out)

P23

microSD card CLK (clock)

P24

microSD card DI (data in)

P25

microSD card /CS (active-low chip select)

P26–P27

P26–P27: Duty modulated D/A converter signals go to:

• Logic buffered yellow LED circuits sockets for brightness control

• Low-pass filter + op-amp buffer with outputs ranging from 0 to 3.3 V

• To DA0 and DA1 analog outputs on the header below the breadboard

• Through coupling capacitor to stereo outputs

P28–P29

64 KB I2C EEPROM for program and data storage. P28 = CLOCK, P29 = DATA

P30

Transmits from Propeller to host computer during programming and communication.

When USB is the selected port, P30 transmits to the computer’s RX connection through

the USB-to-serial converter. When wireless is selected, P30 transmits to the wireless

module’s DI connection. See 20) Programming Selector Indicator LEDs, p. 7.

P31

Receives from host computer during programming and communication. When USB is the

selected port, P31 receives from the computer’s TX connection through the USB-to-serial

converter. When wireless is selected, P31 receives from the wireless module’s DO

connection. See 20) Programming Selector Indicator LEDs, p. 7.