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MC141541 bảng dữ liệu(PDF) 1 Page - Motorola, Inc |
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MC141541 bảng dữ liệu(HTML) 1 Page - Motorola, Inc |
1 / 16 page MC141541 1 MOTOROLA Enhanced Monitor On-Screen Display CMOS The MC141541 is a high performance HCMOS device designed to interface with a microcontroller unit to allow colored symbols or characters to be displayed on a color monitor. The on–chip PLL allows both multi–system operation and self–generation of system timing. It also minimizes the MCU’s burden through its built–in 273 bytes display/control RAM. By storing a full screen of data and control information, this device has the capability to carry out ‘screen–refresh’ without MCU supervision. Since there is no spacing between characters, special graphics–oriented characters can be generated by combining two or more character blocks. There are two different resolutions that users can choose. By changing the number of dots per horizontal line to 320 (CGA) or 480 (EGA), smaller characters with higher resolution can be easily achieved. Special functions such as character bordering or shadowing, multi–level windows, double height and double width, and programmable vertical length of character can also be incorporated. Furthermore, neither massive information update nor extremely high data transmission rate are expected for normal on– screen display operation, and serial protocols are implemented in lieu of any parallel formats to achieve minimum pin count. A special feature, character RAM fonts, is implemented in this MOSD enhanced version (EMOSD). Users can download their own fonts and display them at any time once the chip is powered on. There are two ways for users to build and store fonts. One is a conventional approach to have masked ROM fonts. A newer approach is to store the fonts in the EPROM accessed by the MCU and then download them into the EMOSD character RAM. With this new technique, users have more flexibility in preparing their fonts and the effective number of fonts is greatly increased. • Two Selectable Resolutions: 320 (CGA) and 480 (EGA) Dots per Line • Fully Programmable Character Array of 10 Rows by 24 Columns • 273 Bytes Direct Mapping Display RAM Architecture • Internal PLL Generates a Wide–Ranged System Clock • For High–End Monitor Application, Maximum Horizontal Frequency is 110 kHz (52.8 MHz Dot Clock at 480 Mode) • Programmable Vertical Height of Character to Meet Multi–Sync Requirement • Programmable Vertical and Horizontal Positioning for Display Center • 120 Characters and Graphic Symbols ROM and Eight Programmable Character RAM • 10 x 16 Dot Matrix Character • Character–by–Character Color Selection • A Maximum of Four Selectable Colors per Row • Double Character Height and Double Character Width • Character Bordering or Shadowing • Three Fully Programmable Background Windows with Overlapping Capability • Provides a Clock Output Synchronous to the Incoming H Sync for External PWM • M_BUS (IIC) Interface with Address $7A • Single Positive 5 V Supply Order this document by MC141541/D MOTOROLA SEMICONDUCTOR TECHNICAL DATA PIN ASSIGNMENT MC141541 P SUFFIX PLASTIC DIP CASE 648 ORDERING INFORMATION MC141541P Plastic DIP 13 14 15 16 9 10 11 12 5 4 3 2 1 8 7 6 FBKG B G R VSS VDD VFLB HTONE/ VDD(A) RP VCO SCL(SCK) SDA(MOSI) SS HFLB VSS(A) PWMCK © Motorola, Inc. 1997 REV 1 2/97 TN97031200 |
Số phần tương tự - MC141541 |
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Mô tả tương tự - MC141541 |
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