HITACHI UNVEILS SH-DSP MICROPROCESSOR WITH ON-CHIP ETHERNET.Hitachi Semiconductor (America) Inc. has expanded its SuperH series of RISC RISC
in full Reduced Instruction Set Computing
Computer architecture that uses a limited number of instructions. RISC became popular in microprocessors in the 1980s. microprocessors with the addition of the SH7615 CPU CPU
in full central processing unit
Principal component of a digital computer, composed of a control unit, an instruction-decoding unit, and an arithmetic-logic unit. featuring a hybrid 32-bit RISC and digital signal processing See DSP.
Digital Signal Processing - (DSP) Computer manipulation of analog signals (commonly sound or image) which have been converted to digital form (sampled). (SH-DSP) core, and an on-chip Ethernet controller. By combining 10/100 Ethernet media access controller with a 32-bit RISC processor and 16 x 16 integer DSP onto a single chip, Hitachi provides a cost-effective solution for network-enabled embedded products such as Internet protocol telephones, residential gateways, Internet appliances, printers, and security and industrial devices.
The integration of a hybrid RISC/DSP core along with Ethernet offers a powerful combination that addresses the requirements of a new breed of networked products that require DSP capability. These applications require support for video coders, speech coders, telephony middleware, JBIG JBIG - Joint Bi-level Image Experts Group standards (Joint Bi-Level Image Experts Group (algorithm) Joint Bi-level Image Experts Group - (JBIG) An experts group of ISO, IEC and ITU-T (JTC1/SC2/WG9 and SGVIII) working to define a compression standard for lossless image coding. ), MP3, software modem- and other DSP-intensive tasks in addition to supporting a real-time operating system (operating system) Real-Time Operating System - (RTOS) Any operating system where interrupts are guaranteed to be handled within a certain specified maximum time, thereby making it suitable for control of hardware in embedded systems and other time-critical applications. , and system and network management tasks which are better served by a RISC processor. The SH7615 processor coupled with a physical-layer chip and memory forms a complete Ethernet solution.
"The SH7615 CPU with on-chip Ethernet and DSP delivers a new level of processing capabilities not previously available as an off-the-shelf system solution to systems designers," said Peter Carbone, SuperH product marketing manager for Hitachi Semiconductor (America). "By increasing the level of integration with the addition of 10/100 Ethernet into the SuperH 32-bit RISC architecture, Hitachi's goal is to shorten time-to-market and provide a more cost-effective and flexible solution for our customers."
Features and Benefits of Hitachi's SH7615 RISC Processor
Using a 0.35-micron CMOS (Complementary Metal Oxide Semiconductor) Pronounced "c-moss." The most widely used integrated circuit design. It is found in almost every electronic product from handheld devices to mainframes. process, the 32-bit SH7615 RISC processor runs at 60 megahertz, achieves a performance of 78 million instructions per second Noun 1. million instructions per second - (computer science) a unit for measuring the execution speed of a computer's CPU (but not the whole system); "4 MIPS is 4,000,000 instructions per second"
MIPS (Dhrystone MIPS (Million Instructions Per Second) The execution speed of a computer. For example, .5 MIPS is 500,000 instructions per second; 100 MIPS is a hundred million instructions per second. ) and operates at 3.3 volts with a low power consumption of 690 milliwatts (mW, typical). The device also has a power management module that can put the processor in sleep, standby or module-standby mode, thereby minimizing power consumption even further for power-sensitive applications.
The SH7615 processor's hybrid RISC DSP has an extended Harvard Architecture which simultaneously accesses two data and one address bus and also can sustain a multiply-accumulate function in a single-clock cycle.
Memory on the SH7615 processor includes 4 kilobytes unified cache, 4KB "X" random access memory and 4KB "Y" RAM. The address space is divided into five areas accessible via chip-select output pins. Each area can be configured for glueless connection to synchronous direct random access memory or burst read-only memory with selectable bus width of 8-, 16- or 32-bits.
Single instruction-stream and unified memory space for RISC and DSP simplify the programming environment, and an IEEE (Institute of Electrical and Electronics Engineers, New York, www.ieee.org) A membership organization that includes engineers, scientists and students in electronics and allied fields. 1149.1-compliant debug interface (JTAG (Joint Test Action Group) An IEEE standard for boundary scan technology. See scan technology.
JTAG - Joint Test Action Group ) simplifies debugging.
On-chip Ethernet features include:
-- 10/100 Mbps Ethernet transfer speed
-- Media Access Controller (MAC) with 512 bytes transmit first-in/first-out and 512 bytes receive FIFO (First In First Out) A storage method that retrieves the item stored for the longest time. Contrast with LIFO. See traffic engineering methods.
FIFO - first-in first-out
-- Media Independent Interface readily interfaces to off-the-shelf physical layer devices
-- Magic Packets support to allow the SH7615 processor to transition out of sleep or standby mode when it receives this packet from another device on the network thereby conserving power when idle
-- Two dedicated direct memory access channels for transferring transmit and receive data between the Ethernet Controller and external memory to reduce the load on the CPU.
Rich on-chip peripheral features include five serial channels (two with FIFOs), on-chip debug interface, general-purpose input/output ports (I/O), three timers, one free-running timer and one watch-dog timer.
Pricing, Packaging and Availability
Hitachi's SH7615 processor will be priced at $28 in 10,000-unit quantities and is packaged in a 208-pin LQFP. Engineering samples are scheduled for availability in March, 2000 with volume production scheduled for September, 2000.
About Hitachi Semiconductor (America) Inc.
Hitachi Semiconductor (America) Inc. -- a subsidiary of Hitachi America, Ltd., in turn a subsidiary of Hitachi, Ltd. (NYSE NYSE
See: New York Stock Exchange : HIT) -- supports the requirements of the North American marketplace with a broad range of standard and low-power semiconductor solutions. Offering some of the industry's most popular RISC microprocessors and memory components among other semiconductor solutions, Hitachi provides chips to the world's leading device manufacturers within industrial, consumer and emerging market applications.
For more information, call 800/285-1601.