Difference between revisions of "User:EnthusiasticGeek/Keyboard Case"
Tags: mobile web edit mobile edit |
(More info) Tags: mobile web edit mobile edit |
||
| Line 3: | Line 3: | ||
<!-- Add image --> | <!-- Add image --> | ||
This Keyboard Case is a case for the [[PinePhone]] and [[PinePhone Pro]]. As the name implies, it adds a keyboard to the phones. It also has a 6000 mAh battery that essentially | This Keyboard Case is a case for the [[PinePhone]] and [[PinePhone Pro]]. As the name implies, it adds a keyboard to the phones. It also has a 6000 mAh battery that essentially tripples<!--¹--> the phone's 3000 mAh battery life. | ||
¹ See [[User:EnthusiasticGeek/Keyboard_Case#Charging Information|Charging Information]] for more information. | <!--¹ See [[User:EnthusiasticGeek/Keyboard_Case#Charging Information|Charging Information]] for more information.--> | ||
= Connectivity = | = Connectivity = | ||
| Line 14: | Line 14: | ||
VBUS VBAT GND</nowiki> | VBUS VBAT GND</nowiki> | ||
The SDA and SCL pins belong to the I2C Bus | The SDA and SCL pins belong to the I2C Bus. | ||
VBUS connects to the USB +5V line. See [[User:EnthusiasticGeek/Keyboard_Case#Charging Information|Charging Information]] for more information | |||
The VBAT pin connects to the battery. This powers the keyboard if it is out of power<!--Citation Needed-->. | |||
INT is a pin that's used for interrupts. In this case, it is used so the phone can request key presses from the keyboard.<!--Citation Needed-->. | |||
<!--I'm pretty sure that INT is just a regular GPIO pin, but I'm not sure right now...--> | |||
=== Charging Information === | === Charging Information === | ||
The output of the IP5209 is connected to the VBUS pin. | In most schematics, including the PinePhone and PinePhone Pro, the usually +5V coming from the usb connector is named VBUS. This voltage is fed into the System-On-a-Chip in the PinePhone (Allwinner A64) or PinePhone Pro (RK3399S). The SOC then manages this voltage and charges the battery.<!--Citation and clarification needed--> | ||
The VBUS rail is also accessed through one of the pogo pins on the back of the phone. This is what the keyboard uses to charge the phone. The output of the IP5209 chip<!--explain "the output" better--> is connected to the VBUS rail through this pogo pin, which charges the phone. This makes the keyboard act as a USB charger with only +5V and GND connected, which charges the phone. | |||
This breaks the USB-C spec, as even if the phone and connected device negotiates that ths phone shall be the sink, +5V will still be put out by the PinePhone or PinePhone Pro. This means that a charger plugged into the phone while the keyboard is connected may result in some unintended behaviors.<!--Citation and clarification needed, as well as future links for when people inevitably fry their phones by plugging the charger into the wrong spot ;)--> | |||
This also means that, although the phone is connected | |||
Revision as of 02:46, 3 January 2022
This Keyboard Case is a case for the PinePhone and PinePhone Pro. As the name implies, it adds a keyboard to the phones. It also has a 6000 mAh battery that essentially tripples the phone's 3000 mAh battery life.
Connectivity
The Keyboard Case has six pins that connect it to the PinePhone or PinePhone Pro.
INT SDA SCL VBUS VBAT GND
The SDA and SCL pins belong to the I2C Bus.
VBUS connects to the USB +5V line. See Charging Information for more information
The VBAT pin connects to the battery. This powers the keyboard if it is out of power.
INT is a pin that's used for interrupts. In this case, it is used so the phone can request key presses from the keyboard..
Charging Information
In most schematics, including the PinePhone and PinePhone Pro, the usually +5V coming from the usb connector is named VBUS. This voltage is fed into the System-On-a-Chip in the PinePhone (Allwinner A64) or PinePhone Pro (RK3399S). The SOC then manages this voltage and charges the battery.
The VBUS rail is also accessed through one of the pogo pins on the back of the phone. This is what the keyboard uses to charge the phone. The output of the IP5209 chip is connected to the VBUS rail through this pogo pin, which charges the phone. This makes the keyboard act as a USB charger with only +5V and GND connected, which charges the phone.
This breaks the USB-C spec, as even if the phone and connected device negotiates that ths phone shall be the sink, +5V will still be put out by the PinePhone or PinePhone Pro. This means that a charger plugged into the phone while the keyboard is connected may result in some unintended behaviors.
This also means that, although the phone is connected