Dec, 2004
JA3515 鈥?Transceiver
Wireless Controller IC
Overview
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.
Features
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鈥檚
Internal regulators
I
2
C, UART serial Interface
USB & PS/2 interface
JA3515
CPU
Antenna
24K
ROM
27/40/
49MHz
Radio
4K
RAM
MODEM
USB
PS/2
I/O
GPIO
I
2
C
UART
USB
PS/2
JA3515 System Diagram
7 mm
7 mm
2004 Jaalaa, Inc.
Proprietary and Confidential
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