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M37151M6 Datasheet(PDF) 84 Page - Renesas Technology Corp |
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M37151M6 Datasheet(HTML) 84 Page - Renesas Technology Corp |
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84 / 138 page  M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP Rev.1.00 Nov 01, 2002 page 84 of 136 REJ03B0129-0100Z 8.11.10 Multiline Display This microcomputer can display 2 lines on the CRT screen by dis- playing 2 blocks at different vertical positions. In addition, it can dis- play up to 16 lines by using OSD interrupts. An OSD interrupt request occurs at the point at which that display of each block has been completed. In other words, when a scanning line reaches the point of the display position (specified by the vertical position registers) of a certain block, the character display of that block starts, and an interrupt occurs at the point at which the scan- ning line exceeds the block. Notes 1: An OSD interrupt does not occur at the end of display when the block is not displayed. In other words, if a block is set to display off by the display control bit of the block control register (addresses 00D216, 00D316), an OSD interrupt request does not occur (refer to Figure 8.11.24 (A)). 2: When another block display appears while one block is displayed, an OSD interrupt request occurs only once at the end of the second block display (refer to Figure 8.11.24 (B)). 3: On the screen setting window, an OSD interrupt occurs even at the end of the CC mode block (display off) out of window (refer to Figure 8.11.24 (C)). Fig. 8.11.24 Note on Occurence of OSD Interrupt (B) (C) Block 1 (on display) Block 2 (on display) Block 1’ (on display) Block 2’ (on display) Block 1 (on display) Block 2 (on display) Block 1’ (off display) Block 2’ (off display) “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” No “OSD interrupt request” Block 1 Block 2 “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” “OSD interrupt request” Block 1 Block 2 Block 1’ On display (OSD interrupt request occurs at the end of block display) Off display (OSD interrupt request does not occur at the end of block display) In CC mode Window No “OSD interrupt request” No “OSD interrupt request” (A) |
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