LH77790 
(162.7KB)
Embedded Microcontroller
Description
The LH77790 Embedded microcontroller is an ARM7D-based system on chip with a high level of integration. In addition to the CPU, it consists of a number of essential peripherals, instruction/data cache, and Static RAM. The target applications are handheld, battery operated devices that require performance greater than that available from 16-bit and 32-bit CISC-based controllers. These devices include all monochrome LCD displays, keyboards, non-volatile memory (typically Flash), Static RAM, and other communications ports and external peripherals. The Embedded controller provides the features required in these systems, including an LCD controller, no-glue memory (SRAM / DRAM / EEPROM / Flash) interface, and other peripherals that eliminate all external components, except for memory and buffers (i.e. RS232 level converters). The LH77790 allows an external bus master to take control of the external as well as the internal interface (address bus, data bus, controls).
Features
- Highly integrated single chip
- 32-bit ARM7D CPU core
- 2 kB (B : byte) data/instruction cache
- 2 kB Static RAM (4 kB without cache)
- Low power
- High performance
- Programmable clock and power management
- Programmable monochrome LCD controller
- On-chip interrupt controller
- Three UARTs - 16C450-class
- IrDA/DASK infrared interface
- Three pulse width modulator channels
- Simplified no glue memory interface
- On-chip DRAM controller
- 24-bit Programmable Peripheral Interface (PPI)
- Three 16-bit counter/timer channels
- Hardware watchdog timer
- Dual range operation
5 V TTL/25 MHz
3.3 V LVTTL/16.7 MHz
- Package : 176-pin LQFP (LQFP176-P-2424)
Applications
- Hand-held personal equipment (GPSs, PDAs, communications, games)
- Point-of-sale (barcode scanners, portable inventory controllers)
- Industrial instrumentation (portable oscilloscopes, analyzers)
Development tools
The ARM software development toolkit provides a complete integrated environment for software development. The toolkit provides a complete toolset for :
- Software simulation via ARMulator
- ANSI C optimized compiler
- ARM assembler
The ARM software development toolkit is available on the following platforms :
- Windows 95
- Windows 3.1x
- Windows NT (Intel and Alpha)
- MS DOS 6.x
- Sun Os 4.1x
ARM and ARM7D are trademarks of Advanced RISC Machines Ltd.
©1993 Advanced Risc Machines Ltd.
