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Pi 4 I/O interface options… and where to find them
How can I turn an GPIO to its alternate function?Connecting Adafruit NFC breakout and serial console at the same timeHow do you decide between communication protocols?Data Communication between two raspberry pi's via GPIOWhere can I find a python example for the Parallax MS5607 Altimeter?Pi to Pi Communication over GPIO / USBRaspberry Pi 2, Model B, separate SPI modules and clock of themLego EV3 infrared sensor to raspberry pi 3 direct connection via UART?UART pins not reading sensor output RPI3Raspberry PI SPI interfaceOptions to add 20 UART to RPi
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The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are:
- up to 6 × I2C,
- up to 6 × UART (muxed with I2C),
- up to 6 × SPI (only five exposed on Raspberry Pi 4B)
The Pi 4 however shares the pinout of its GPIO header with the older models (see here).
So where exactly are the additional serial interfaces?
i2c spi uart pi-4
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are:
- up to 6 × I2C,
- up to 6 × UART (muxed with I2C),
- up to 6 × SPI (only five exposed on Raspberry Pi 4B)
The Pi 4 however shares the pinout of its GPIO header with the older models (see here).
So where exactly are the additional serial interfaces?
i2c spi uart pi-4
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are:
- up to 6 × I2C,
- up to 6 × UART (muxed with I2C),
- up to 6 × SPI (only five exposed on Raspberry Pi 4B)
The Pi 4 however shares the pinout of its GPIO header with the older models (see here).
So where exactly are the additional serial interfaces?
i2c spi uart pi-4
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are:
- up to 6 × I2C,
- up to 6 × UART (muxed with I2C),
- up to 6 × SPI (only five exposed on Raspberry Pi 4B)
The Pi 4 however shares the pinout of its GPIO header with the older models (see here).
So where exactly are the additional serial interfaces?
i2c spi uart pi-4
i2c spi uart pi-4
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
asked 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
add a comment |
1 Answer
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The preliminary Raspberry Pi 4 Model B datasheet, section "5.1.1 GPIO Pin Assignments" says:
As well as being able to be used as straightforward software controlled input and output (with programmable
pulls), GPIO pins can be switched (multiplexed) into various other modes backed by dedicated
peripheral blocks such as I2C, UART and SPI.
In addition to the standard peripheral options found on legacy Pis, extra I2C, UART and SPI peripherals
have been added to the BCM2711 chip and are available as further mux options on the Pi4. This gives
users much more flexibility when attaching add-on hardware as compared to older models.
The "additional" interfaces are alternate functions that are multiplexed to the existing GPIO pins. So while it is true that this gives the user more flexibility using any of these functions will reduce the number of available general purpose I/O pins. The alternate functions are listed in section "5.1.2 GPIO Alternate Functions":
How to go about activating alternate functions: How can i turn an GPIO to its alternate function?
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
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The preliminary Raspberry Pi 4 Model B datasheet, section "5.1.1 GPIO Pin Assignments" says:
As well as being able to be used as straightforward software controlled input and output (with programmable
pulls), GPIO pins can be switched (multiplexed) into various other modes backed by dedicated
peripheral blocks such as I2C, UART and SPI.
In addition to the standard peripheral options found on legacy Pis, extra I2C, UART and SPI peripherals
have been added to the BCM2711 chip and are available as further mux options on the Pi4. This gives
users much more flexibility when attaching add-on hardware as compared to older models.
The "additional" interfaces are alternate functions that are multiplexed to the existing GPIO pins. So while it is true that this gives the user more flexibility using any of these functions will reduce the number of available general purpose I/O pins. The alternate functions are listed in section "5.1.2 GPIO Alternate Functions":
How to go about activating alternate functions: How can i turn an GPIO to its alternate function?
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
The preliminary Raspberry Pi 4 Model B datasheet, section "5.1.1 GPIO Pin Assignments" says:
As well as being able to be used as straightforward software controlled input and output (with programmable
pulls), GPIO pins can be switched (multiplexed) into various other modes backed by dedicated
peripheral blocks such as I2C, UART and SPI.
In addition to the standard peripheral options found on legacy Pis, extra I2C, UART and SPI peripherals
have been added to the BCM2711 chip and are available as further mux options on the Pi4. This gives
users much more flexibility when attaching add-on hardware as compared to older models.
The "additional" interfaces are alternate functions that are multiplexed to the existing GPIO pins. So while it is true that this gives the user more flexibility using any of these functions will reduce the number of available general purpose I/O pins. The alternate functions are listed in section "5.1.2 GPIO Alternate Functions":
How to go about activating alternate functions: How can i turn an GPIO to its alternate function?
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
The preliminary Raspberry Pi 4 Model B datasheet, section "5.1.1 GPIO Pin Assignments" says:
As well as being able to be used as straightforward software controlled input and output (with programmable
pulls), GPIO pins can be switched (multiplexed) into various other modes backed by dedicated
peripheral blocks such as I2C, UART and SPI.
In addition to the standard peripheral options found on legacy Pis, extra I2C, UART and SPI peripherals
have been added to the BCM2711 chip and are available as further mux options on the Pi4. This gives
users much more flexibility when attaching add-on hardware as compared to older models.
The "additional" interfaces are alternate functions that are multiplexed to the existing GPIO pins. So while it is true that this gives the user more flexibility using any of these functions will reduce the number of available general purpose I/O pins. The alternate functions are listed in section "5.1.2 GPIO Alternate Functions":
How to go about activating alternate functions: How can i turn an GPIO to its alternate function?
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
The preliminary Raspberry Pi 4 Model B datasheet, section "5.1.1 GPIO Pin Assignments" says:
As well as being able to be used as straightforward software controlled input and output (with programmable
pulls), GPIO pins can be switched (multiplexed) into various other modes backed by dedicated
peripheral blocks such as I2C, UART and SPI.
In addition to the standard peripheral options found on legacy Pis, extra I2C, UART and SPI peripherals
have been added to the BCM2711 chip and are available as further mux options on the Pi4. This gives
users much more flexibility when attaching add-on hardware as compared to older models.
The "additional" interfaces are alternate functions that are multiplexed to the existing GPIO pins. So while it is true that this gives the user more flexibility using any of these functions will reduce the number of available general purpose I/O pins. The alternate functions are listed in section "5.1.2 GPIO Alternate Functions":
How to go about activating alternate functions: How can i turn an GPIO to its alternate function?
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
answered 9 hours ago
Ghanima♦Ghanima
13.1k11 gold badges41 silver badges85 bronze badges
13.1k11 gold badges41 silver badges85 bronze badges
add a comment |
add a comment |
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