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Blecon Chip (BCN2201)
The Blecon Chip includes everything required to enable Blecon in your device.
The Blecon modem chip packages up the firmware, radio, antenna and radio approvals in a tiny package with the API serialised over UART, USB or SPI.
Three control interfaces are supported. At least one must be connected to your host MCU for proper operation.
The BCN2201 supports a USB 2.0-compliant full-speed interface. USB pins must be connected to the corresponding USB lines: VUSB, D+ and D-. A virtual serial interface (CDC ACM) is brought up on the host when connected.
Lines MOSI, MISO and SCK must be connected to the host MCU’s SPI bus. CS is the chip select line. The SPI interface operates in CPOL=0, CPHA=0 mode, and supports up to 32MHz transfer rates.
Lines TX, RX, CTS and RTS must be connected to a UART bus. Hardware (RTS/CTS) flow-control is used for proper operation of the device. The default baudrate is set to 115200bps, with 8 data bits, no parity, and 1 stop bit.
A NFC antenna can be connected between the differential NFC1 and NFC2 pins. Two external capacitors should be used to tune the resonance of the antenna circuit to 13.56 MHz. The total capacitance on NFC1 and NFC2 must be matched.
When using the reference NFC antenna below, tuning capacitors can be set to 300pF.
Typical BCN2201 application
LGA QFN 62-pin package. Top view.
All units in mm.
We recommend PCB land patterns and solder mask layouts to use the same dimensions as the chip’s pads:
- 0.4 mm x 0.4 mm for standard pads
- 0.8 mm x 0.8 mm for standard pads
For optimal operation, we recommend enforcing a metal-keepout area around the top of the BCN2201, excluding the LGA pads necessary for proper mechanical stability of the chip.
Additionally, the BCN2201 chip is RoHS compliant.