DESCRIPTION

The LH79520, powered by an ARM720T, is a complete System-on-Chip with a high level of integration to satisfy a wide range of requirements and expectations. The LH79520 combines a 32-bit ARM720T RISC, Color LCD controller, Cache, Local SRAM, a number of essential peripherals such as Direct Memory Access, Serial and Parallel Interfaces, Infrared support, Timers, Real Time Clock, Watchdog Timer, Pulse Width Modu lators, and an on-chip Phase Lock Loop. Debug is made simple by JTAG support

FEATURES

• Highly Integrated System-on-Chip

• High Performance (77.4144 MHz CPU Speed)

• ARM720T™ RISC Core

– 32-bit ARM7TDMI™ RISC Core

– 8 kB Cache

– MMU (Windows CE™ Enabled)

– Write Buffer

• 32 kB On-Chip SRAM

• Flexible, Programmable Memory Interface

– SDRAM Interface

– 15-bit External Address Bus

– 32-bit External Data Bus

– Two Segments (128 MB each)

– SRAM/Flash/ROM Interface

– 26-bit External Address Bus

– 32-bit External Data Bus

– Seven Segments (64 MB Each)

• Multi-stream DMA Controller

– Four 32-bit Burst-based Data Streams

• Clock and Power Management

– 32.768 kHz Oscillator for Real Time Clock

– 14.7456 MHz Oscillator and On-chip PLL for CPU and Bus Clocks

– Active, Standby, Sleep and Stop Power Modes

– Externally-supplied Clock Options

• Low Power Modes

– Active Mode: 55 mA (MAX.)

– Standby Mode: 35 mA (MAX.)

– Sleep Mode: 5.5 mA (MAX.)

– Stop Mode 2: 18 µA

• Watchdog Timer

• Vectored Interrupt Controller

– 16 Standard and 16 Vectored IRQ Interrupts

– Hardware Interrupt Priority

– Software Interrupts

– FIQ Fast Interrupts

• Three UARTs

– 16-byte FIFOs for Rx and Tx

– IrDA SIR Support

– Supports Data Rates Up to 460.8 kb/s

• Two 16-bit Pulse Width Modulators

• Two Dual Channel Timer Modules

• Real Time Clock

– 32-bit Up-counter with Programmable Load

– Programmable 32-bit Match Compare Register

• 64 Programmable General Purpose I/O Signals

– Multiplexed with Peripheral I/O Signals

• Programmable Color LCD Controller

– Up to 800 × 600 Resolution

– Supports STN, Color STN, AD-TFT, TFT

– Supports 15 Shades of Gray

– TFT: Supports 64 k Direct Colors or 256 Colors selected from a Palette of 64,000 Colors

– Color STN: Supports 3,375 Direct Colors or 256 Colors Selected from a Palette of 3,375 Colors

• Synchronous Serial Port

– Supports Data Rates Up to 1.8452 Mb/s

– Compatible with Common Interface Schemes

– Motorola SPI™

– National Semiconductor MICROWIRE™

– Texas Instruments SSI

• JTAG Debug Interface and Boundary Scan

• 5 V Tolerant Digital I/O

– XTALIN and XTAL32IN inputs are 1.8 V ± 10