Datasheet

ManualsBrandsRaspberry Pi ManualsDevelopment Boards & KitsRaspberry Pi 1 - Model B+ 512MB RAM

101

102

103

104

105

106

107

108

109

110

06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page 102

6.2 Alternative Function Assignments

Every GPIO pin can carry an alternate function. Up to 6 alternate function are available but

not every pin has that many alternate functions. The table below gives a quick over view.

Pull

ALT0

ALT1

ALT2

ALT3

ALT4

ALT5

GPIO0 High SDA0 SA5 <reserved>

GPIO1 High SCL0 SA4 <reserved>

GPIO2 High SDA1 SA3 <reserved>

GPIO3 High SCL1 SA2 <reserved>

GPIO4 High GPCLK0 SA1 <reserved>

ARM_TDI

GPIO5 High GPCLK1 SA0 <reserved>

ARM_TDO

GPIO6 High GPCLK2 SOE_N / SE <reserved>

ARM_RTCK

GPIO7 High SPI0_CE1_N SWE_N /

SRW_N

GPIO8 High SPI0_CE0_N SD0 <reserved>

GPIO9 Low SPI0_MISO SD1 <reserved>

GPIO10 Low SPI0_MOSI SD2 <reserved>

GPIO11 Low SPI0_SCLK SD3 <reserved>

GPIO12 Low PW M0 SD4 <reserved>

ARM_TMS

GPIO13 Low PW M1 SD5 <reserved>

ARM_TCK

GPIO14 Low TXD0 SD6 <reserved>

TXD1

GPIO15 Low RXD0 SD7 <reserved>

RXD1

GPIO16 Low <reserved> SD8 <reserved> CTS0 SPI1_CE2_N CTS1

GPIO17 Low <reserved> SD9 <reserved> RTS0 SPI1_CE1_N RTS1

GPIO18 Low PCM_CLK SD10 <reserved> BSCSL SDA /

MOSI

SPI1_CE0_N PWM0

GPIO19 Low PCM_FS SD11 <reserved> BSCSL SCL /

SCLK

SPI1_MISO PWM1

GPIO20 Low PCM_DIN SD12 <reserved> BSCSL /

MISO

SPI1_MOSI GPCLK0

GPIO21 Low PCM_DOUT SD13 <reserved> BSCSL /

CE_N

SPI1_SCLK GPCLK1

GPIO22 Low <reserved> SD14 <reserved> SD1_CLK ARM_TRST

GPIO23 Low <reserved> SD15 <reserved> SD1_CMD ARM_RTCK

GPIO24 Low <reserved> SD16 <reserved> SD1_DAT0 ARM_TDO

GPIO25 Low <reserved> SD17 <reserved> SD1_DAT1 ARM_TCK

GPIO26 Low <reserved> <reserved> <reserved> SD1_DAT2 ARM_TDI

GPIO27 Low <reserved> <reserved> <reserved> SD1_DAT3 ARM_TMS

GPIO28 - SDA0 SA5 PCM_CLK <reserved>

GPIO29 - SCL0 SA4 PCM_FS <reserved>

GPIO30 Low <reserved> SA3 PCM_DIN CTS0

CTS1

GPIO31 Low <reserved> SA2 PCM_DOUT RTS0

RTS1

GPIO32 Low GPCLK0 SA1 <reserved> TXD0

TXD1

GPIO33 Low <reserved> SA0 <reserved> RXD0

RXD1

GPIO34 High GPCLK0 SOE_N / SE <reserved> <reserved>

GPIO35 High SPI0_CE1_N SWE_N /

SRW_N

GPIO36 High SPI0_CE0_N SD0 TXD0 <reserved>

GPIO37 Low SPI0_MISO SD1 RXD0 <reserved>

GPIO38 Low SPI0_MOSI SD2 RTS0 <reserved>

GPIO39 Low SPI0_SCLK SD3 CTS0 <reserved>

GPIO40 Low PW M0 SD4

<reserved> SPI2_MISO TXD1