Does OPPO R 15 support otg function?

OPPO R 15, which supports OTG function, was released by USB implementer forum, and is mainly used to connect different devices or mobile devices for data exchange, especially pads, mobile phones and consumer devices.

It changes the inconvenience of data exchange between memory cards with up to seven standards by replacing connectors with different standards among digital cameras, video cameras, printers and other devices.

Extended data

Functional characteristics

take a picture

OPPO R 15 introduces Sony IMX5 19 sensor, which can shoot160,000 pixels, with the size of 1/2.6 inches, and the single pixel area is increased from 1. 12 to1.

OPPOR 15 series comes standard with a new generation of AI portrait mode. Through 3D portrait lighting technology, it is easy to shoot a "portrait blockbuster" with professional lighting effects. In addition, R 15 series will realize more natural blur through a number of innovative camera technologies such as dual camera background blur and AI intelligent beauty.

OPPOR 15 series is equipped with 20 million cameras, which is the first to adopt 3 HDR technology. Through the real-time hierarchical exposure of hardware, the backlight self-timer is clearer, and at the same time, the rich details of people and backgrounds can be preserved.

bulk memory

OPPO R 15 introduced a storage combination of 6GB+ 128GB.

battery

OPPO R 15 is equipped with 3450mAh battery and VOOC flash charging.

Game optimization

OPPO and tencent games jointly set up an innovation laboratory. OPPO R 15 improved the mobile game "Survival of the Jedi: Stimulating the Battlefield", and deeply optimized the complex game scenes such as high-altitude multi-person skydiving, high-power mirror shooting, complex terrain and vegetation, and driving vehicles. , greatly improving the fluency of the game and optimizing many other popular games.

Communication protocol

On the basis of full compatibility with USB2.0 standard, USB OTG standard adds power management (power saving) function, allowing devices to operate as both host and peripheral (dual-purpose OTG).

OTG dual-purpose equipment fully conforms to USB2.0 standard, can provide certain host detection capability, and supports host communication protocol (HNP) and session request protocol (SRP). In OTG, the initial host device is called A device, and the peripheral device is called B device.

The initial function can be determined by the way the cable is connected. Figure 1 is a schematic diagram of determining the default host with the fifth ID pin. The dual-purpose device uses a new mini AB socket, thus adding a fifth pin (ID) for mini A plug, mini B plug and mini AB socket to identify different cable endpoints.

The ID pin in the mini-A plug is grounded, and the ID pin in the mini-B plug is suspended. When the OTG device detects the grounded ID pin, it means that device A (host) is the default, and the device that detects the floating ID pin is considered as device B (peripheral). Once the system is connected, the role of OTG can be changed.

The host and peripheral devices adopt new HNP, and device A is the default host, which provides VBUS power, resets the bus, enumerates and configures device B when device connection is detected. The second new protocol that OTG standard adds to USB is called Session Request Protocol (SRP). SRP allows device B to request device A to turn on VBUS power and start a conversation.

OTG conversation can be determined by the time when Device A supplies power to VBUS (Note: Device A always supplies power to VBUS, even as a peripheral). You can also end the session by turning off the VBUS power supply through device A to save power consumption, which is very important in battery-powered products.

For example, when two cellular phones exchange information with each other through a connection, one of them is connected to the mini-A terminal, which is the A device and defaults to the host. The other is device B, which is a peripheral by default. When USB communication is not needed, device A can turn off the VBUS cable, and device B will detect this state and enter the low power consumption mode.

OTG dual-purpose equipment fully conforms to USB2.0 standard, can provide certain host detection capability, and supports host communication protocol (HNP) and session request protocol (SRP).

References:

Baidu encyclopedia -OTG

References:

Baidu encyclopedia -OPPO R 15