Pin Function Multiplexing Control (Summary); Table 3 Arduino* Pin Mux And Pin Mode Settings - Intel Edison Kit for Arduino Hardware Manual

Shield pin configuration
2.2

Pin function multiplexing control (summary)

All GPIO pins on the Arduino* header require some internal GPIOs to be set up before the pin is usable. This is
usually as simple as setting an output enable, pullup enable, and mode. However, some pins have extra
functionality such as SPI, PWM, or I
Table 3 shows this such that a programmer can easily see all the muxing pins affected for a given Arduino* header
pin. The color codes in the table show related boxes. For example, the blue boxes are meant to show the
relationship between the pin mux pins and the pin modes. This table is a synopsis of the more detailed tables
below, which contain extra information, such as schematic pin numbers. For most needs, this synopsized table
should suffice.
Table 3 Arduino* pin mux and pin mode settings
Linux
GPIO
pin
Linux pin
130
IO0
130
IO0
131
IO1
128
IO2
12
IO3
129
IO4
13
IO5
182
IO6
48
IO7
49
IO8
183
IO9
41 263
IO10
240
43 262
IO11
241
42 242
IO12
40 243
IO13
44 200
IO14 (A0)
45 201
IO15 (A1)
46 202
IO16 (A2)
47 203
IO17 (A3)
14 204
IO18 (A4)
165 205
IO19 (A5)
Note:
Before setting up any muxing, set pin 214 (TRI_STATE_ALL) to LOW, make all of your changes, then set pin
214 to HIGH.
December 2014
Document Number: 331191-004
2
C, so these pins need extra multiplexing (muxing) in order to be usable.
GPIO pin mux
0 (low) 1 (high)
PWM see 240
GPIO or I2S GPIO or SPI_FS
PWM see 241
GPIO or I2S GPIO or SPI TXD
GPIO or I2S GPIO or SPI RXD
GPIO or I2S GPIO or SPI CLK
GPIO A0
GPIO A1
GPIO A2
GPIO A3
GPIO or I2C SDA A4
GPIO or I2C SCL A5
SoC pin modes Output enable
(high = output)
0 1
GPIO UART
GPIO UART
GPIO UART
GPIO UART
GPIO PWM
GPIO UART
GPIO PWM
GPIO PWM
GPIO
GPIO
GPIO PWM
GPIO I2S or SPI
GPIO I2S or SPI
GPIO I2S or SPI
GPIO I2S or SPI
GPIO
GPIO
GPIO
GPIO
GPIO I2C-6
GPIO I2C-6
Intel® Edison Kit for Arduino*
Pullup
enable
Linux Linux
248 216
248 216
249 217
250 218
251 219
252 220
253 221
254 222
255 223
256 224
257 225
258 226
259 227
260 228
261 229
232 208
233 209
234 210
235 211
236 212
237 213
Hardware Guide
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