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M37210M3-902SP Datasheet(PDF) 22 Page - Mitsubishi Electric Semiconductor |
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M37210M3-902SP Datasheet(HTML) 22 Page - Mitsubishi Electric Semiconductor |
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22 / 59 page  MITSUBISHI MICROCOMPUTERS M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP M37210E4-XXXSP/FP, M37210E4SP/FP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER 22 12 dots 16 dots Functions 18 characters ! 2 lines 12 ! 16 dots (refer to Figure 19) 96 3 kinds 1 screen : 4 kinds A character Possible (multiline display) Possible (maximum 7 kinds) CRT DISPLAY FUNCTIONS (1) Outline of CRT Display Functions Table 4 outlines the CRT display functions of the M37210M3-XXXSP. The M37210M3-XXXSP incorporates a 18 columns ! 2 lines CRT display control circuit. CRT display is controlled by the CRT display control register. Up to 96 kinds of characters can be displayed, and colors can be specified for each character. Four colors can be displayed on one screen. A combination of up to 7 colors can be obtained by using each output signal (R, G and B). Characters are displayed in a 12 ! 16 dot configuration to obtain smooth character patterns (refer to Figure 19). The following shows the procedure how to display characters on the CRT screen. Fig. 19 CRT display character configuration Fig. 20 Structure of CRT control register Set the character to be displayed in display RAM. Set the display color by using the color register. Specify the color register in which the display color is set by us- ing the display RAM. Specify the vertical position and character size by using the verti- cal position register and the character size register. Specify the horizontal position by using the horizontal position register. Write the display enable bit to the designated block display flag of the CRT control register. When this is done, the CRT starts op- eration according to the input of the VSYNC signal. The CRT display circuit has an extended display mode. This mode allows multiple lines (more than 3 lines) to be displayed on the screen by interrupting the display each time one line is dis- played and rewriting data in the block for which display is terminated by software. Figure 21 shows a block diagram of the CRT display control circuit. Figure 20 shows the structure of the CRT display control register. Table 4. Outline of CRT display functions Parameter Number of display character Character configuration Kinds of character Character size Color Display expansion Raster coloring Kinds of color Coloring unit Note : Display is controlled by logical product (AND) between the all- blocks display control bit and each block display control bit 70 CRT control register (CC : address 00EA16) Display of all blocks control bit (Note) 0 : Display of all blocks off 1 : Display of all blocks on Display of block 1 control bit 0 : Display of block 1 off 1 : Display of block 1 on Display of block 2 control bit 0 : Display of block 2 off 1 : Display of block 2 on |
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