Bluegiga Technologies Oy

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USART 0 and USART 1 are each configurable as either an SPI master/slave or a UART. They provide double

buffering on both RX and TX and hardware flow control and are thus well suited to high-throughput full-duplex

applications. Each USART has its own high-precision baud-rate generator, thus leaving the ordinary timers

free for other uses. When configured as SPI slaves, the USARTs sample the input signal using SCK directly

instead of using some oversampling scheme, and are thus well-suited for high data rates.

The AES encryption/decryption core allows the user to encrypt and decrypt data using the AES algorithm with

128-bit keys. The AES core also supports ECB, CBC, CFB, OFB, CTR, and CBC-MAC, as well as hardware

support for CCM.

The ADC supports 7 to 12 bits of resolution with a corresponding range of bandwidths from 30-kHz to 4-kHz,

respectively. DC and audio conversions with up to eight input channels (I/O controller pins) are possible. The

inputs can be selected as single-ended or differential. The reference voltage can be internal, AVDD, or a

single-ended or differential external signal. The ADC also has a temperature-sensor input channel. The ADC

can automate the process of periodic sampling or conversion over a sequence of channels.

The operational amplifier is intended to provide front-end buffering and gain for the ADC. Both inputs as well

as the output are available on pins, so the feedback network is fully customizable. A chopper-stabilized mode

is available for applications that need good accuracy with high gain.

The ultralow-power analog comparator enables applications to wake up from PM2 or PM3 based on an analog

signal. Both inputs are brought out to pins; the reference voltage must be provided externally. The comparator

output is connected to the I/O controller interrupt detector and can be treated by the MCU as a regular I/O pin

interrupt.

RF front end

RF front end includes combined matched balun and low pass filter, and ceramic chip antenna with matching

network. Optimal matching combined with effective low pass filter provides extremely low in-band spurious

emissions and harmonics. Optionally as a module assembly variant RF can be traced either to an embedded

u.fl connector or to the RF pin of the module.