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 %