Daewoo DTR-14D3VG Service Manual

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Daewoo DTR-14D3VG Service Manual Manual pdf 9 page image

7IC DescriptionDW90244-AS/(Z8 DIGITAL TELEVISION CONTROLLER)= Z9024106PSC (ZILOG TYPE NO.)(1) General DescriptionThe Z9023X Digital Television Controller (DTC) family is ZILOG’s latest and most powerful Z8-based DTC product offering,These parts feature larger system RAM and Rom Options, together with a host of new features including a newcolor palettesysten, flexible inter-row spacing, higher character cell resolution, background mesh effect, dedicated I. R. capture registers,on-chip Analog-to-Digital conversion, and a hardware Master mode I2C interface. The famililiar Z8 core in combination withthese advanced features makes the Z9023X family an ideal choice for low to midrange televisions in both PAL and MTSCmarkets.The Z9023X family consists of three basic device types; ICE Chip (Z90239), ROM Mask Parts (Z90233/Z90234), and OTPPart (Z90231), The OTP (Z90231) supports field programmable 32KB system ROM. ICE Chip (Z90239) is used in Z90239Emulator and ProtoPaK. As described above, Z90233 supports 16KB system ROM and Z90234 supports 24KB systemROM for mask.The Z9021X family takes full advantage of the Z8’s expanded register file space to offer greater flexibility in On Screen Dis-play creation.(2) FeatureZ8-Based CMOS Microcontroller for Consumer Television, Cable Box, and Satellite Receiver Applications• 42 - Pin SDIP Package except Z90239 (124 PGA)• Z8@ MCU Core at 6 MHz• Mask ROM sizes Available in 16 and 24KB• Ten 6-bit Pulse Width Modulators• One 14-bit Pulse Width Modulator• On-Chip Infrared (IR) Capture Registers• Four Channel 4-bit Analog-to-Digital Converter• Twenty Seven General Purpose I/O Pins• I2C Master Serial Communication PortOn Screen Display (OSD) Section• 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 Colors Fully Programmable by Character