GENERAL DESCRIPTION

The DSC SAA8122E/C1 is a high performance, low power, single-chip MIPS based microprocessor which is dedicated to image processing and compression.

FEATURES

? Support a wide range of CCD (VGA,SVGA,QGA,XGA,EQGA)

? Perform an advanced RGB to YUV conversion

? Support smart measurement unit to speed up the control loop (Focus, auto white balance,...)

? Support a wide range of LCD and TV format (NTSC and PAL) with text re-insertion features

? Support an embedded JPEG encoder/decoder unit.

? MIPS PR3001 CPU, running in a frequency range from 12 to 28 MHz.

? PRISC compatible PI-bus architecture, interrupt, power management, clock and reset architectures.

? Support a dedicated video bus and SDRAM memory for picture storage

? Support for ROM, DRAM,SRAM, flash and PC Card (Compact Flash and SSFDC).

? Integrated general purpose peripherals like a USB,FIR,UART, timers, an I2C transceiver, ADC converters, RTC and IO ports.

EXTERNAL UNTERFACES

? a dedicated interface to IEEE 1394 devices (such as Philips’ PDI 1394 chip-set)

? two UART (RS-232) data ports with DMA capabilities (≤ 187.5kbit/s) including hardware flow control RxD, TxD, RTS, CTS for modem support

? 32 general purpose, bidirectional I/O interface pins, the first 8 bits may also be used as interrupt inputs

? two PWM output (8 bit resolution)

CPU relqted features

? a 32-bit PR3001 core

? 1 KB (kilo byte) data cache and 4 KB instruction cache

? a programmable low-power mode, including wake-up on interrupt

? a memory management unit (TLB: translation lookaside buffer)

? two built in 24-bit general purpose timers and one 24-bit watchdog timer in coprocessor zero two built in 24-bit general purpose timers

? a real-time clock unit (active in sleep mode)

? an on-chip 8 KBytes SRAM for storing code which needs fast execution