SAA8122A Datasheet(数据表) 2 Page

2 page

Philips Semiconductors

SAA8122A

Digital Still Camera Processor (ImagIC family)

Objective speciﬁcation

Rev. 01 — 20 April 2000

2 of 26

9397 750 07048

s Interface to ROM, DRAM, SRAM, ﬂash and PC Card [Compact Flash and SSFDC

(SmartMedia)]

s Integrated general purpose peripheral units like a UART, timers, an I2C-bus

transceiver, ADC converters, RTC and I/O ports

s Includes USB and RS-232C communication interfaces.

2.2 External interfaces

s Two UART (RS-232) data ports with DMA capabilities (

≤187.5 kbit/s) including

hardware ﬂow control RxD, TxD, RTS, CTS for modem support

s 32 general purpose, bidirectional I/O interface pins, the ﬁrst 8 bits may also be

used as interrupt inputs

s Two PWM outputs (8-bit resolution).

2.3 CPU related features

s 32-bit PR3001 core

s 1-kbyte data cache and 4-kbyte instruction cache

s Programmable low-power mode, including wake-up on interrupt

s Memory management unit [Translation Lookaside Buffer (TLB)]

s Two built in 24-bit general purpose timers and one 24-bit watchdog timer

s Real-time clock unit (active in sleep mode)

s On-chip 8-kbyte SRAM for storing code which needs fast execution

s Platform software based on real-time pSOS (plug-in Silicon Operating System).

2.4 DSP features

s Advanced colour reconstruction

s Programmable digital ﬁlters for noise reduction and contour enhancement

s 16 programmable measurement windows allowing to perform the measurements

necessary for exposure, white balance and focus adjustment in a DSC system;

available measurement outputs for exposure, white balance and focus control.

2.5 Pulse pattern generator features

s Programmable through dedicated PC-software, allowing to drive all CCDs

currently present in the market, as well as CDS/AGC/ADC chips: up to

× 8 kpixels.

2.6 JPEG

s Fully ISO10918 compliant

s Supports Tiff, Exif 2.1, DCF & DPOF

s Quick compression (4 images/s for a 1.3 Mpixels resolution).

2.7 USB interface

s Fully compatible with USB.

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