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 %