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July 15, 1998

Hitachi releases the 32-bit Single-chip RISC Microcontroller With Industry-leading Built-in Flash Memory of 512kB

With the larger programs being used in electronic devices incorporating microcontrollers, the reduction in product development times, improvements in device specifications and calibration of control data, there is a strong demand for field programmability, which allows microcontroller programs to be modified at the various stages from development through trial manufacture, start of production and up to mass production. In response, Hitachi has developed a full lineup of 21 microcontrollers with built-in flash memory that are reprogrammable even after they have been embedded in the final product. These microcontrollers include the 8-bit and 16-bit microcontrollers in the F-ZTAT^TM*1 series, and the SuperH^TM RISC engine (SuperHTM^*2) family of 32-bit RISC microcontrollers.

In response to increasing user demand, Hitachi has started production of the high-performance SuperH family, featuring increased flash memory capacity and a built-in FPU for single-precision floating point operations. The SuperH family of RISC microprocessors and microcontrollers feature Hitachi's original architecture, providing high-performance processing and, thanks to their many built-in peripheral functions for a wide variety of equipment needs, facilitate the development of systems using microcomputers. Since production of the world's first single-chip RISC microcontroller (the SH7034) in November 1992, Hitachi has, in addition to the SH-1, SH-2, SH-3, and SH-4 microprocessors, developed the SH-DSP, which combines a RISC CPU and DSP (digital signal processor), and is currently developing products based on these 5 CPU cores.

The SH7055F is based on a high-performance SH-2 core with a built-in single-precision FPU for improved operational performance. Its industry-leading built-in 512kB flash memory can be accessed in a single-cycle operation at a maximum operating frequency of 40MHz. In addition, there is support not only for erase all but also for functions for splitting the flash memory into up to 16 blocks so that, when modifying the control data for the system in which the processor is used, only the required block needs be erased.

Moreover, for applications in which precision control is necessary, or where it is important to integrate the various forms of control, the SH7055F supports a wide range of peripheral functions. As enhanced timer functions, this microcontroller features a built-in advanced timer unit-II (ATU-II) that includes 10 free- running counters, 16 down-counters and 8 PWM (Pulse Width Modulation) counters, a watchdog timer channel that can be used as an interval timer, and two compare-match timer channels. The ATU-II features up to 65 pulse I/O processing functions, including 32- bit/16-bit input capture, 16-bit one-shot pulse, 16-bit output compare, 16-bit PWM. The interlinking between timer channels allow precision pulse signal processing without the need to generate CPU interrupts. The 32 built-in ADC channels, with their 10-bit resolution, achieve a conversion accuracy of +/-2LSB, and allow precision system control using analog signals from multiple sensors.

The SH7055F also features two Hitachi controller-area network (HCAN) channels, which are Bosch CAN Ver. 2.0B active -compatible and have 16 message buffers/ channel, capable of selecting 16 buffer 2 HCAN or 32 buffer 1 HCAN to permit high speed reliable communications. In addition, there are enhanced on-chip debugging functions for high-performance, high- precision system control in industrial control equipment and, particularly, equipment used in automotive applications.

The internal logic of the SH7055F, including the CPU, runs on a power supply of 3.3+/-0.3V to conserve power consumption, while the peripheral I/O pins function at 5.0+/-0.5V, allowing use of existing peripheral circuits. The SH7055F is based on a 0.35mm CMOS process, and comes in a 256-pin QFP package. Hitachi plans to continue to enhance its F-ZTAT microprocessor lineup by incorporating the newly developed flash memory into its SuperH family, the H8S series, and the H8 series. There are also plans to further develop the SH7050 series by adopting a 0.18 micrometers process, further raising the CPU speed, increasing memory capacity, and enhancing peripheral functions.

Notes:	1.	F-ZTAT is a trademark of Hitachi, Ltd.
	2.	SuperH is a trademark of Hitachi, Ltd.

Example Applications
Industry: Factory automation, sequencers, NC
Automobiles: Engine control, AT control, Suspension control

Price in Japan

Product name	Internal memory capacity	Sample price (Yen)
SH7055F HD64F7055F	512kB	4,000

Features

• 1. Large-capacity built-in flash memory
  At 512kB, the SH7055F has the industry's largest built-in flash memory capacity. In each stage, from development through to trial manufacture and the start of production through to mass production, the SH7055F allows on-board programming and the modification of control data. The incorporation of a voltage step-up circuit facilitates the designing of device power supplies by eliminating theneed for external 12V power supplies for writing or deleting data.
• 2. 32-bit RISC CPU core and built-in FPU
  Operating at 40MHz, the SH7055F achieves 52MIPS. In addition to the sum-of-products function and high- performance RISC CPU, the SH7055F features a built-in single-precision FPU for high-speed system control andintegrating various other controls.
• 3. Multiple built-in peripheral functions
  The SH7055F features multiple built-in peripheral functions including advanced timer unit-II (ATU-II), 32- channel ADC, 4-channel DMAC, and 2-channel Hitachi controller area network (HCAN) for sophisticated, precision system control.
• 4. 5V I/O interface
  The internal logic of the SH7055F, including the CPU, runs on a power supply of 3.3+/-0.3V to conserve power consumption, while the peripheral I/O pins function at 5.0+/-0.5V, allowing use of existing peripheral circuits.

Development Environment
The following software and hardware are available:
Software: Cross-C compiler, cross-assembler, cross- simulator/debugger
Hardware: Real-time emulator (E8000)

Specifications

Item	Specification
Power supply	I/O: 5V+/-0.5V, internal logic: 3.3V+/-0.3V
Operating frequency	40MHz
Processing speed	52MIPS
CPU core	32-bit original RISC processor: SH-2 core
CPU instructions	62 (all instructions are fixed 16-bit instructions)
DSP functions	32-bit x 32-bit --> 64-bit	: 2 to 4 cycles
	32-bit x 32-bit + 64-bit--> 64-bit	: 2 to 4 cycles
	16-bit x 16-bit -->32-bit	: 1 to 3 cycles
	16-bit x 16-bit + 64-bit--> 64-bit	: 2 to 3 cycles
Floating point unit	Single-precision floating point operations
	IEEE compatible
Internal flash memory	512kB
Internal RAM	32kB
External memory	Direct connection to SRAM and ROM via bus state controller
	Four external address spaces: Each with programmable bus width and number of wait cycles
	Data bus width: 8-bit or 16-bit
	Idle cycle can be inserted to prevent bus contention
Internal peripheral counters	Advanced timer unit-II (ATU-II): 10 free-run counters,16 down-counters and 8 PWM counters
	Advanced pulse controller: x 8.
	ADC x 32ch: 10-bit resolution
	DMAC x 4ch
	Serial communication interface (SCI) x 5ch
	Hitachi controller area network (HCAN) 16-message buffer x 2ch or 32-message buffer x 1ch, Ver.2.0B active-compatible
	Compare-match timer x 2ch
	Watchdog timer
	Interrupt controller: 117 factors
	User break controller
	Hitachi user debug interface
	Advanced user debugger
	Parallel I/O ports: x 149
	Clock oscillator: Built in PLL frequency multiplier
	Low power dissipation modes: Sleep, hardware/software standby
Package	QFP256 (0.5mm pitch, 28mm x 40mm)
Power dissipation	600mW(tpy.)
Process	0.35 micrometers 3-layer aluminum CMOS process

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