SAA8115HL Ver la hoja de datos (PDF) - Philips Electronics

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SAA8115HL

Digital camera USB interface

Philips Electronics 

Philips Semiconductors

Digital camera USB interface

Preliminary specification

SAA8115HL

1 FEATURES

• VGA (progressive mode), CIF and medium resolution

(PAL non-interlaced mode) CCD sensors compliant

• D1 digital video input (8 bits YUV 4 : 2 : 2 time

multiplexed)

• Internal Pulse Pattern Generator (PPG) dedicated for

VGA Panasonic, CIF and medium resolution Sharp

sensors or compatibles, and frame rate selection

• Frame rate converter

• SDRAM interface for high quality VGA snapshot

(uncompressed 4 : 2 : 2 or 4 : 2 : 0)

• Downsampler and scaler (programmable formatter for

CIF, QCIF, sub-QCIF, SIF and QSIF) controlled via

SNERT (UART) interface

• Flexible compression engine controlled via SNERT

(UART) interface

• Selectable output frame rate (up to 15 fps in VGA, up to

30 fps in CIF and QCIF)

• Video packetizer FIFO

• I2C-bus interface for communication between the USB

protocol hardware and the external microcontroller

• Microphone/audio input to USB (microphone supply,

controllable gain and ADC)

• Integrated analog bus driver (ATX)

• Integrated main oscillator

• Integrated 5 V power supply and reset circuit including

functionalities for bus-powered USB device

• Programmable (frequency and duty cycle) switch mode

power signal for CCD supply

• Miscellaneous functions (e.g. power management, PLL

for audio frequencies).

2 APPLICATIONS

Low-cost desktop video applications with USB interface.

3 GENERAL DESCRIPTION

The SAA8115HL is the second generation of integrated

circuit applicable in PC video cameras to convert D1 video

signals and analog audio signals to properly formatted

USB packets.

This powerful successor of the SAA8117HL can handle up

to 15 fps in VGA format or 30 fps in CIF format. High

snapshot quality is achievable using the SDRAM interface

to an external memory.

It is designed as a back-end of the SAA8112HL (general

camera digital processing IC) and is optimized for use with

the TDA8784 to TDA8787 (camera pre-processing ICs).

2000 Jan 27

3

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