The new board is the Model B+, which should not be thought of as a Raspberry Pi 2, added Upton.
What is different?
- GPIO header extended to 40 pins. First 26 pins exactly the same as 26 pin header on original.
- Two extra USB ports bringing total to four.
- SD Card socket is now a Micro SD Card socket.
- On-board regulators are now switchers, saving from 0.5 to 1W.
- Lower power consumption. By replacing linear regulators with switching ones we’ve reduced power consumption by between 0.5W and 1W.More USB. We now have 4 USB 2.0 ports, compared to 2 on the Model B, and .
- Composite video now emerges from a fourth pin on the 3.5mm audio jack.
- The connectors have bene moved to put them along two sides of the Pi, not all four.
- There are now four mounting holes, and the board corners have been rounded.
What is the same?
- The SoC remains the Broadcom BCM2835 (ARM11 v6 archtecture).
- RAM is 512Mbyte
- Model B software runs on the B+
- element 14 and RS are suppliers
- Camera (CSI) and display (DSI) connectors stay
The power supply clean-up extends to “better hotplug and overcurrent behaviour” on the USB, said Upton, and “the audio circuit incorporates a dedicated low-noise power supply”.
Extensions to the IO include ID-SC and ID-SD which form an I2C bus for external EEPROM so boards plugged into the 40pin header can identify themselves to allow the IO to be configured by the ARM processor.