Daewoo DTU-14, Service Manual

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4-2. DW 90244 - *** ( z90244 : ZILOG TYPE )
(1) GENERAL DESCRIPTION
The Z9024X Digital Television Contrlooer ( DTC ) family is ZiLOG’s most powerful Z8-based DTC product offering.
Enhanced features of the Z9024X include :
* Large System RAM and ROM
* Flexible Inter-Row Spacing
* High-Resolution Character Cell
* Background Mesh Effect
* Dedicated Infrared Capture Registers
* On-Chip Analog-to-Digital Converter
* Hardware Master Mode I C Interface
The familiar Z8 architecture, in combination with these advanced features, makes the Z9024X family an idea choice
for mid-range televisions in both PAL and NTSC markets.
The Z9024X family consists of three basic devices :
* Z90243, 16kb
* Z90244, 24kb
* Z90241
The OTP supports a field-programmable 32kb system ROM. The ICE Chip is used in the Protopak. The Z9024X fam-
ily takes full advantage of the Z8 microcontroller’s expanded register file space to offer greater flexibility in On-Screen
Display creations such as bitmap-simulated graphics, icons, and animation generation.
ON SCREEN DISPLAY ( OSD ) FEATURES
* Supports Displays Up to 10 Rows by 24 Columns with 256 Characters
* Character Cell Resolution of 14 Pixels by 18 Scan Lines
* Variable Inter-Row Spacing from 0-15 Horizontal Scan Lines
* Foreground and Background Color of a Character is Fully Programmable Using a Color Palette Table
(2) FEATURES
* Z8 MCU Core at 6 MHz
* Avaible in 16kb and 24kb Mask ROM Options
* 236 Bytes of System RAM
* Ten 6-bit Pulse Width Modulators
* One 14-bit Pulse Width Modulators
* Three-Channel 4-Bit Analog-to-Digital Converter
* 26 General Purpose I/O Pins
* I C Master Serial Communication Port
* 42-Pin SDIP Package ( Z90243, Z90244 and, Z90241 )
IC description
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