CX24155

Set-top Box Solutions Satellite S a Single-Chip DBS Set-Top Box System Solution at CX24152/5 .D w w w Complete IC System Solution for Worldwide DBS Platforms Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. Conexant’s Single-Chip IC DBS Set-top box (STB) System Solution features all the major subsystems required to implement the core system and decoder electronics of a DBS interactive TV STB. This includes an MPEG-2 A/V decoder (Dolby Digital audio is optional), transport processor, a 32-bit RISC CPU, a 2D graphics accelerator, TV e e h U 4 t m o .c encoder, QPSK demodulator, channel 3/4 RF modulator, a video/graphics display compositing controller and a set of peripheral I/O ports for set-top box front and back panel connectors. For a complete system hardware design, the only additional components required are a tuner, modem codec, audio DAC, SDRAM and flash memory ICs. This high level of integration delivers the low-cost system bill-of-materials sought after by mainstream digital DBS multichannel TV operators. An advanced interactive set-top receiver will include sophisticated middleware to run downloadable applications using a high-speed return channel. Example applications include Advanced EPGs, online games, shopping, and interactive polling. The ARM920 CPU in the CX24152/5 offers up to 224 Dhrystone 2.1 MIPS at a 200MHz clock speed. This CPU platform repr...