S3C44B0X RISC MICROPROCESSOR
SAMSUNG's S3C44B0X 16/32-bit RISC microprocessor is designed to provide a cost-effective and high performance
micro-controller solution for hand-held devices and general applications. To reduce total system cost, S3C44B0X
also provides the following: 8KB cache, optional internal SRAM, LCD controller, 2-channel UART with handshake, 4-
channel DMA, System manager (chip select logic, FP/ EDO/SDRAM controller), 5-channel timers with PWM, I/O
ports, RTC, 8-channel 10-bit ADC, IIC-BUS interface, IIS-BUS interface, Sync. SIO interface and PLL for clock.
The S3C44B0X was developed using a ARM7TDMI core, 0.25 um CMOS standard cells, and a memory compiler. Its
low-power, simple, elegant and fully static design is particularly suitable for cost-sensitive and power sensitive
applications. Also S3C44B0X adopts a new bus architecture, SAMBA II (SAMSUNG ARM CPU embedded
Microcontroller Bus Architecture).
An outstanding feature of the S3C44B0X is its CPU core, a 16/32-bit ARM7TDMI RISC processor (66MHz) designed
by Advanced RISC Machines, Ltd. The architectural enhancements of ARM7TDMI include the Thumb de-
compressor, an on-chip ICE breaker debug support, and a 32-bit hardware multiplier.
By providing a complete set of common system peripherals, the S3C44B0X minimizes overall system costs and
eliminates the need to configure additional components. The integrated on-chip functions that are described in this
document are as follows:
2.5V Static ARM7TDMI CPU core with 8KB cache . (SAMBA II bus architecture up to 66MHz)
External memory controller. (FP/EDO/SDRAM Control, Chip Select logic)
LCD controller (up to 256 color DSTN) with 1-ch LCD-dedicated DMA.
2-ch general DMAs / 2-ch peripheral DMAs with external request pins
2-ch UART with handshake(IrDA1.0, 16-byte FIFO) / 1-ch SIO
1-ch multi-master IIC-BUS controller
1-ch IIS-BUS controller
5-ch PWM timers & 1-ch internal timer
Watch Dog Timer
71 general purpose I/O ports / 8-ch external interrupt source
Power control: Normal, Slow, Idle, and Stop mode
8-ch 10-bit ADC.
RTC with calendar function.
On-chip clock generator with PLL.