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參數(shù)資料
| 型號： | LH79531 |
| 英文描述： | ARM RISC CORE ASSPs ARM7TDMI |
| 中文描述： | ARM的RISC核心專用標(biāo)準(zhǔn)的ARM7TDMI |
| 文件頁數(shù)： | 1/39頁 |
| 文件大?。?/td> | 296K |
| 代理商： | LH79531 |
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Preliminary Data Sheet
8/21/02
1
LH79520
System-on-Chip
Preliminary Data Sheet
FEATURES
Highly Integrated System-on-Chip
High Performance (77.4144 MHz CPU Speed)
ARM720T RISC Core
– 32-bit ARM7TDMI RISC Core
– 8KB Cache
– MMU (Windows CE Enabled)
– Write Buffer
32KB On-Chip SRAM
Flexible, Programmable Memory Interface
– SDRAM Interface
– 15-bit External Address Bus
– 32-bit External Data Bus
– Two Segments (128MB each)
– SRAM/Flash/ROM Interface
– 26-bit External Address Bus
– 32-bit External Data Bus
– Seven Segments (64MB 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
μ
A
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, HR-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 Inputs
DESCRIPTION
The LH79520, powered by an ARM720T, is a com-
plete 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.
This high level of integration lowers overall system
costs, reduces development cycle time and acceler-
ates product introduction. The LH79520’s fully static
design, power management unit, low voltage operation
(1.8 V Core, 3.3 V I/O, 1.8 V optional*), on-chip PLL,
fast interrupt response time, on-chip cache and SRAM,
powerful instruction set, and low power RISC core pro-
vide high performance.
To build an advanced portable device, advanced pro-
cessing 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.
NOTE:
*Under development. Results pending further characterization.
ARM720T and ARM7TDMI are trademarks of Advanced RISC
Machines, LTD.
Motorola SPI is a trademark of Motorola, Inc.
National Semiconductor MICROWIRE is a trademark of
National Semiconductor Corporation.
Windows CE is a trademark of Microsoft Corporation.
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