SAA5249P中文资料飞利浦数据手册PDF规格书

GENERAL DESCRIPTION

The Integrated VIP and Teletext (IVT1.1BMCX) is a teletext decoder (contained within a single chip package) for decoding 625-line based World System Teletext transmissions. With its built-in background memory controller the device can store incoming teletext packets in the external 1M4 DRAM. With this large packet store which can be rapidly scanned, we can achieve near instantaneous access to all the pages transmitted by the broadcaster.

FEATURES

• Complete teletext decoder featuring a background memory controller in a single 48-pin DIP package. Capable of storing of up to 512 teletext pages in an external DRAM, giving instant access to the teletext data

• Automatic processing of extension packet 26 for widest possible language decoding. All our standard language options can be available, and the language option is readable via I2C-bus.

• 100 hardware compatible with the SAA5247 plug-in replacement and with the possibility of extra market in those countries with packet 26 transmissions. Still pin-aligned to SAA5254 and SAA5244A.

• 100 software compatible with the SAA5247, and SAA5244A, except if the special OSD symbols were used. Also 100 software compatible to SAA5254. In all events there is a change to the ROM ID number.

• The device is pin-aligned with the other members of the new Philips teletext decoder family, i.e. SAA5281 and the SAA5254, making one hardware solution for the whole range

• Low software overhead for the microprocessor

• RGB interface to standard colour decoder ICs, push-pull output drive.