![]() The disadvantage of this is that the instability of the burning is increased. It does not matter to developers, but for mass production, the problem is very serious!ġ.1K resistance is connected between the burner and the spi of the Bluetooth board to reduce the risk of the high current of the burner being connected to the Bluetooth chip. However, if 3.3V SPI level is used, about 5% of the chips will be damaged. Note: as for SPI voltage description, we all know that the IO port voltage of csr86xx series is 1.8V, so SPI burning voltage also needs 1.8V. Please download the driver, burning tool and manual in the attachment.Įxplanation on burning voltage of CSR Bluetooth SPI.The power supply part is more clean, with tantalum capacitor decoupling and two 220uF tantalum capacitors built in.However, if you worry about wrong connection, you will not be afraid of short circuit ![]() The PTC current limiting protection is added to limit the current to 500mA.Add SPI level switching function, support 3.3V and 1.8V.Support 3.3V and 1.8V dual power output.This product can realize the functions of program burning, parameter setting, modification and program online debugging for Bluetooth target board. CSR usb-spi-s is a special burning and debugger for bluecore series Bluetooth products of CSR company in UK.
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