Skip to content

Split table into two for Pi4B and non Pi4B , simplify table as well #2461

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Mar 3, 2022
Merged

Split table into two for Pi4B and non Pi4B , simplify table as well #2461

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
0f9a52f
Split table into two for Pi4B and non Pi4B , simplify table as well
dp111 Mar 3, 2022
90d3a92
Tweaked words
aallan Mar 3, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
170 changes: 78 additions & 92 deletions documentation/asciidoc/computers/raspberry-pi/gpio-on-raspberry-pi.adoc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -41,54 +41,22 @@ Almost all of the GPIO pins have alternative functions. Peripheral blocks intern

=== Voltage Specifications

The following table gives the various voltage specifications for the GPIO pins, it was extracted from the xref:compute-module.adoc#datasheets-and-schematics[Compute Module datasheet].
The table below gives the various voltage specifications for the GPIO pins for BCM2835 and BCM2837-based products (e.g. Raspbery Pi Zero or Raspberry Pi 3+). For information about Compute Modules you should see the xref:compute-module.adoc#datasheets-and-schematics[relevant datasheets].

|===
| Symbol | Parameter | Conditions   | Min | Typical | Max | Unit

| V~IL~
| Input Low Voltage
| VDD IO = 1.8V
| -
| -
| 0.6
| V

|
|
| VDD IO = 2.7V
| -
| -
| 0.8
| V

|
|
| VDD IO = 3.3V
| -
| -
| 0.9
| V

| V~IH~
| Input high voltage^a^
| VDD IO = 1.8V
| 1.0
| -
| -
| V

|
|
| VDD IO = 2.7V
| 1.3
| -
| -
| V

|
|
| VDD IO = 3.3V
| 1.6
| -
| -
Expand All @@ -112,117 +80,135 @@ The following table gives the various voltage specifications for the GPIO pins,

| V~OL~
| Output low voltage^b^
| VDD IO = 1.8V, IOL = -2mA
| IOL = -2mA
| -
| -
| 0.2
| 0.14
| V

|
|
| VDD IO = 2.7V, IOL = -2mA
| V~OH~
| Output high voltage^b^
| IOH = 2mA
| 3.0
| -
| -
| 0.15
| V

|
|
| VDD IO = 3.3V, IOL = -2mA
| I~OL~
| Output low current^c^
| VO = 0.4V
| 18
| -
| -
| 0.14
| V
| mA

| V~OH~
| Output high voltage^b^
| VDD IO = 1.8V, IOH = 2mA
| 1.6
| I~OH~
| Output high current^c^
| VO = 2.3V
| 17
| -
| -
| V
| mA

|
|
| VDD IO = 2.7V, IOH = 2mA
| 2.5
| R~PU~
| Pullup resistor
| -
| 50
| -
| V
| 65
| kΩ

|
|
| VDD IO = 3.3V, IOH = 2mA
| 3.0
| R~PD~
| Pulldown resistor
| -
| 50
| -
| 65
| kΩ
|===

^a^ Hysteresis enabled +
^b^ Default drive strength (8mA) +
^c^ Maximum drive strength (16mA)

The table below gives the various voltage specifications for the GPIO pins for BCM2711-based products (e.g. Raspberry Pi 4 and Raspberry Pi 400). For information about Compute Modules you should see the xref:compute-module.adoc#datasheets-and-schematics[relevant datasheets].

|===
| Symbol | Parameter | Conditions   | Min | Typical | Max | Unit

| V~IL~
| Input Low Voltage
| -
| -
| -
| 0.8
| V

| I~OL~
| Output low current^c^
| VDD IO = 1.8V, VO = 0.4V
| 12
| V~IH~
| Input high voltage^a^
| -
| 2.0
| -
| mA
| -
| V

|
|
| VDD IO = 2.7V, VO = 0.4V
| 17
| I~IL~
| Input leakage current
| TA = +85◦C
| -
| -
| mA
| 10
| µA

|
|
| VDD IO = 3.3V, VO = 0.4V
| 18
| V~OL~
| Output low voltage^b^
| IOL = -4mA
| -
| -
| mA
| 0.4
| V

| I~OH~
| Output high current^c^
| VDD IO = 1.8V, VO = 1.4V
| 10
| V~OH~
| Output high voltage^b^
| IOH = 4mA
| 2.6
| -
| -
| mA
| V

|
|
| VDD IO = 2.7V, VO = 2.3V
| 16
| I~OL~
| Output low current^c^
| VO = 0.4V
| 7
| -
| -
| mA

|
|
| VDD IO = 3.3V, VO = 2.3V
| 17
| I~OH~
| Output high current^c^
| VO = 2.6V
| 7
| -
| -
| mA

| R~PU~
| Pullup resistor
| -
| 50
| 33
| -
| 65
| 73
| kΩ

| R~PD~
| Pulldown resistor
| -
| 50
| 33
| -
| 65
| 73
| kΩ
|===

^a^ Hysteresis enabled +
^b^ Default drive strength (8mA) +
^c^ Maximum drive strength (16mA)
^b^ Default drive strength (4mA) +
^c^ Maximum drive strength (8mA)