Hyundai HLT-3220 Service Manual page 31

2. MCU SECTION.
Device: SDA55XX
Features: Built-in teletext decoder.
8051 compatible.
Internal ROM type.
1) Description
The device provides an integrated general-purpose, fully 8051-compatible Microcontroller
with television specific hardware features. Microcontroller has been enhanced to provide
powerful features such as memory banking, data pointers and additional interrupts etc.
Internal XRAM consists of up to 16 Kbytes. Device has an internal ROM of up to 128
Kbytes.
The SDA 55xx supports a wide range of standards including PAL, NTSC and contains a
digital slicer for Teletext and Closed Caption.
Fabricated in an advanced CMOS process, the SDA55XX is provided in PMQFP64 SMD
type plastic package.
2) Block Diagram.
SERVICE MANUAL
CIRCUIT DESCRIPTIONS
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