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 Modulators, and an on-chip Phase Lock Loop. Debug is made simple by JTAG support.
This high level of integration lowers overall system costs, reduces development cycle time and accelerates product introduction. The LH79520’s fully static design, power management unit, low voltage operation (1.8 V Core, 3.3 V I/O), on-chip PLL, fast interrupt response time, on-chip cache and SRAM, powerful instruction set, and low power RISC core provide high performance.
To build an advanced portable device, advanced processing capability is required. This capability must come with increased performance in the display system and peripherals, and yet demand less power from batteries. The LH79520 is an integrated solution to fit these needs.
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
