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MTV118 Datenblatt(PDF) 5 Page - List of Unclassifed Manufacturers |
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MTV118 Datenblatt(HTML) 5 Page - List of Unclassifed Manufacturers |
5 / 30 page 5/15 MTV118 Revision 2.0 01/01/1999 MTV118 MYSON TECHNOLOGY The data transmission is permitted to change from format (a) to format (b) and (c), or from format (b) to format (a), but not from format (c) back to format (a) and (b). The alternation between transmission for- mats is configured as the state diagram shown in Figure 3 on page 5. 3.2 Address Bus Administrator The administrator manages bus address arbitration of internal registers or user font RAM during exter- nal data write-in. The external data write through serial data interface to registers must be synchronized by internal display timing. In addition, the administrator also provides automatic incrementation to the address bus when external writing occurs using format (c). 3.3 Vertical Display Control The vertical display control can generate different vertical display sizes for most display standards in current monitors. The vertical display size is calculated with the information of a double character height bit(CHS) and a vertical display height control register(CH6-CH0).The algorithms of a repeating charac- ter line display are shown in Tables 2 and 3. The programmable vertical size range is 270 lines to max- imum 2130 lines. TABLE 1. Configuration of Transmission Formats Address b7 b6 b5 b4 b3 b2 b1 b0 Format Address Bytes of Display Reg. Row 1 0 0 x R3 R2 R1 R0 a,b,c Columnab 0 0 x C4 C3 C2 C1 C0 a,b Columnc 0 1 x C4 C3 C2 C1 C0 c Attribute Bytes of Display Reg. Row 1 0 1 x R3 R2 R1 R0 a,b,c Columnab 0 0 x C4 C3 C2 C1 C0 a,b Columnc 0 1 x C4 C3 C2 C1 C0 c User Fonts RAM Row 1 1 x x x R2 R1 R0 a,b,c Columnab 0 0 C5 C4 C3 C2 C1 C0 a,b Columnc 0 1 C5 C4 C3 C2 C1 C0 c Initiate ROW COL c COL ab DA c DA ab 1, X 0, 1 0, 1 1, X 1, X format (a) format (b) format (c) X, X 0, X Input = b7, b6 0, 0 FIGURE 3. Transmission State Diagram |
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