
As discussed in the previous section, GPIOs 3 through 8 are set by default for special functions such as
modem controls. To use GPIOs 3 through 8 as normal GPIOs, you must place a jumper between JP7
and JP8 for the specific GPIO as described in the previous section. GPIO 2 can also have a special
function if SPI mode is selected for the LCD display via header JP12 as described in the LCD Interface
section later in this chapter.
Table 10 General Purpose I/O Signal Descriptions
Special function SPI_CS- for LCD display
Special function TEMP_CS SPI temperature sensor enable
Special function, nLED_3; wired link
Special function, nLED_2; wireless link
Switch Input; 1 = off, 0 = switch depressed*
*The functionality of GPIO_9 and GPIO_10 cannot be changed by the user.
Comentarios a estos manuales