In a new spin of its 32-bit SuperH embedded MPU, the SJ7763, Renesas is targeting the home network and the various information appliances located there: VoIP end-points, surveillance cameras and digital home
appliances including media receivers, home servers, and PC peripherals.
To operate effectively in the home networking environment the new CPU incorporates a two-channel Gigabit Ethernet (GbE) controller supporting 10/100/1000 Mbps LANs, and a PCI (Peripheral Component Interconnect) bus controller.
The new microprocessor incorporates an SH-4A dual-issue superscalar RISC CPU core with a built-in floating point unit (FPU) for higher performance and precise real-time processing capabilities.
Its’ performance has been effectively doubled over pervious iterations of the architecture to 478 million instructions per second (MIPS), and 1.9 giga- floating point operations per second (GFLOPS) at the operating frequency of 266MHz.
To achieve this improvement, the architecture incorporates a 7-stage pipeline in the RISC core and the 10-stage pipeline in the FPU enable greater parallelism in instruction execution.
The CPU’s switch fabric-like internal SuperHyway bus has been configured to allow simultaneous transfers of data between memory and peripherals at high speeds, a benefit in many consumer embedded designs requiring movement of large amounts of graphics and video.
The on-chip two-channel GbE controller supports the IEEE802.3 compliant RMII (Reduced Media Independent Interface) interface specification, so it can be used simultaneously with the on-chip 32-bit-wide PCI bus controller that supports the PCI Rev.2.2 standard. The SH7763's PCI bus interface allows seamless communication with IEEE 802.11a/g/b compatible wireless LAN chips.
When built into digital appliances, the SH7763 can handle both the application’s data processing needs while while simultaneously handling data traffic from connections to two Ethernet wired 10/100 Mbps LANs and a wireless LAN.
By providing both 1000 Mbps (1 Gbps) high-speed LAN support and a high-performance CPU core, the microprocessor enables the fast network transfers essential for high-speed transmission and reception of movies and similar large-volume data.
An onboard security accelerator which performs high-speed encryption/decryption processing supports Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES) as data encryption methods, and Message
Digest-5 (MD5) and Secure Hash Algorithm-1 (SHA-1) as authentication
data generation methods.
The device's two-channel moving-image-stream interface can handle high-speed transfer of the MPEG-2 TS (Transport Stream) transfer format and can connect to an MPEG-2 encoder/decoder chip.
Secure transfer of digital content -- such as transmissions from terrestrial digital broadcasting systems -- is made possible by transmitting and receiving the streaming data on a network after performing encryption/decryption processing with the security accelerator on the SH7763.
A double-data-rate (DDR) SDRAM interface integrated in the SH7763 facilitates the high-speed data processing by the SH-4A core and the high-speed data transfers by the GbE, PCI, and security accelerator. Other on-chip SH7763 peripherals include a USB interface, serial communication interface, audio CODEC
interface, timers, MultiMediaCard interface, Direct Memory Access
Controller (DMAC), and color-LCD controller, and more.
Development tools available for the new SH7763 include evaluation boards such as
Hitachi ULSI Systems' Solution Engine, and the Renesas E10A-USB emulator. The 266 MHz CPU in a 449 pin BGA will be available next month in sample quantities for $30 each.
Renesas Technology America, Inc.
San Jose, Ca.