Friday, September 19, 2008

2.4GHz wireless chip has own MCU

Nordic Semiconductor has introduced its smallest 2.4GHz wireless device, the nRF24LE1 which integrates a 2.4GHz transceiver core (the nRF24L01+) and a mixed signal 8-bit microcontroller with flash memory for ULP wireless applications.
The device has an enhanced 8051 mixed-signal MCU core featuring fewer clock cycles per instruction than legacy 8051 devices. Most instructions need just one or two clock cycles leading to an average performance improvement of x8 using the MIPS benchmark.
This performance and the chip's 16kbyte of on-chip flash plus 1kbyte of SRAM enables it to run both the RF protocol stack and application layer.

The chip is available in a 4x4mm QFN package.
A ULP 32kHz crystal oscillator provides timing for low report rate synchronous protocols and a 16MHz RC oscillator provides fast start-up times from idle. The 32kHz oscillator can provide timing accurate enough for higher report rate protocols without requiring an external crystal.
A security co-processor supports AES encrypted wireless communications.

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