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PRODUCT OVERVIEW S3C2440A RISC MICROPROCESSOR
1-2
FEATURES
Architecture
• Integrated system for hand-held devices and
general embedded applications.
• 16/32-Bit RISC architecture and powerful
instruction set with ARM920T CPU core.
• Enhanced ARM architecture MMU to support
WinCE, EPOC 32 and Linux.
• Instruction cache, data cache, write buffer and
Physical address TAG RAM to reduce the effect
of main memory bandwidth and latency on
performance.
• ARM920T CPU core supports the ARM debug
architecture.
• Internal Advanced Microcontroller Bus
Architecture (AMBA) (AMBA2.0, AHB/APB).
System Manager
• Little/Big Endian support.
• Support Fast bus mode and Asynchronous bus
mode.
• Address space: 128M bytes for each bank (total
1G bytes).
• Supports programmable 8/16/32-bit data bus
width for each bank.
• Fixed bank start address from bank 0 to bank 6.
• Programmable bank start address and bank size
for bank 7.
• Eight memory banks:
– Six memory banks for ROM, SRAM, and others.
– Two memory banks for ROM/SRAM/
Synchronous DRAM.
• Complete Programmable access cycles for all
memory banks.
• Supports external wait signals to expand the bus
cycle.
• Supports self-refresh mode in SDRAM for power-
down.
• Supports various types of ROM for booting
(NOR/NAND Flash, EEPROM, and others).
NAND Flash Boot Loader
• Supports booting from NAND flash memory.
• 4KB internal buffer for booting.
• Supports storage memory for NAND flash
memory after booting.
• Supports Advanced NAND flash
Cache Memory
• 64-way set-associative cache with I-Cache
(16KB) and D-Cache (16KB).
• 8words length per line with one valid bit and two
dirty bits per line.
• Pseudo random or round robin replacement
algorithm.
• Write-through or write-back cache operation to
update the main memory.
• The write buffer can hold 16 words of data and
four addresses.
Clock & Power Manager
• On-chip MPLL and UPLL:
UPLL generates the clock to operate USB
Host/Device.
MPLL generates the clock to operate MCU at
maximum 400Mhz @ 1.3V.
• Clock can be fed selectively to each function
block by software.
• Power mode: Normal, Slow, Idle, and Sleep
mode
Normal mode: Normal operating mode
Slow mode: Low frequency clock without PLL
Idle mode: The clock for only CPU is stopped.
Sleep mode: The Core power including all
peripherals is shut down.
• Woken up by EINT[15:0] or RTC alarm interrupt
from Sleep mode