Hardware Reference
In-Depth Information
Table 1-1.
The Available Pin Headers on GPIO
Pin Number
Primary Function
AlternateFunction
Alternate 1 Function
Pin Number
Pin Name
Function
Alternate Function
P1-01
3.3 V
I
2
C SDA
P1-02
5 V
P1-03
GPIO 0
I
2
C SCL
P1-04
NC
P1-05
GPIO 1
GPCLK0
P1-06
GND
P1-07
GPIO 4
P1-08
GPIO 14
UART0_TXD
ALT5=UART1_TDX
P1-09
NC
P1-10
GPIO 15
UART0_RDX
ALRT5=UART1_RXD
P1-11
GPIO 17
ALT3=UART0_RTS
ALT5=UART1_RTS
P1-12
GPIO 18
ALT4=SPI1_CE0_N
ALT5 =PWM0
P1-13
GPIO 21
PCM_DIN
ALT5=GPCLK1
P1-14
NC
P1-15
GPIO 22
ALT3=SD1_CLK
ALT4 = ARM_TRST
P1-16
GPIO 23
ALT3=SD1_CMD
ALT4=ARM_RTCK
P1-17
NC
P1-18
GPIO 24
ALT3=SD1_DATA0
ALT4=ARM_TD0
P1-19
GPIO 10
SPI0_MOSI
P1-20
NC
P1-21
GPIO 9
SPI0_MISO
P1-22
GPIO 25
ALT4=ARm_TCK
P1-23
GPIO 11
SPI0_SCLK
P1-24
GPIO 8
SPI0_CE0_N
