JA3515

`Tri-band, 27 MHz, 40 MHz and 49 MHz single-chip radio
`World-wide unlicensed RF bands
`Reliable, bi-directional data link
`GFSK modulation
`64 kbps max data rate
`Robust Interference Avoidance
`Viterbi decoder
`High tolerant frequency compensation
`8051 micro-controller
`JTAG interface
`4-kByte SRAM
`Application integrated in 24-kByte ROM
`16 programmable GPIO's
  Internal regulators
  I2C, UART serial Interface
  USB & PS/2 interface

The JA3515 is a low-cost, highly integrated, tri-band, system-on-chip targeted for wireless keyboard and mouse applications. The JA3515 can be used as a complete, high performance PC transceiver interface for a wireless keyboard and mouse, using minimum external components. All necessary functions, the RF transceiver, baseband, modem, control logic and I/O interfaces; both USB and PS2 are on-chip. The protocol stack and application software are integrated in the built-in mask ROM.

The wireless data link runs with very low latency at data rates up to 64 kbps. The system incorporates a proprietary media access control protocol (MAC) that provides highly reliable wireless data transfers even in an environment with other wireless users.