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ST63140 数据表(PDF) 51 Page - STMicroelectronics |
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ST63140 数据表(HTML) 51 Page - STMicroelectronics |
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51 / 86 page ![]() “1” -The background on the following word is en- abled by BG1 and the colour is set by R1, G1, and B1. WE. Word Enable. The word enable bit defines whether or not the following word is displayed. “0” -The word is not displayed. “1” -If the global enable bit is one, then the word is displayed. VSE. Vertical Space Enable. The vertical space enable bit determines the spacing between lines. “0” -The space between lines is equal to 0h. The al- phanumeric character set is implemented in a 5 x 7 format with one empty column to the right and one empty row above and one below and stored in a 6 x 9 format. “1” -The space between lines is defined by the value in the vertical space register. Table 13. Format Character Register Colour Setting. R G B Colou r 0 0 0 Black 0 0 1 Blue 0 1 0 Green 0 1 1 Cyan 100 Red 1 0 1 Magenta 1 1 0 Yellow 1 1 1 White Table 14. Format Character Register Size Setting GS2 GS1 S Vertical Height Horizontal length 0 0 0 18h 6 TDOT 0 0 1 36h 12 TDOT 0 1 0 18h 6 TDOT 0 1 1 54h 18 TDOT 1 0 0 36h 12 TDOT 1 0 1 54h 18 TDOT 1 1 0 36h 12 TDOT 1 1 1 72h 24 TDOT TDOT= 2/fosc ON-SCREEN DISPLAY (Continued) Display Character See Data RAM Table Description for specific Addresses ( Write Only) D7 D6 D5 D4 D3 D2 D1 D0 C5-C0 = Character Types control Bit Fixed to “0” Unuse d Figure 60. Display Character Register Explanation D7. This bit is not used. D6. This bit is fixed to “0”. C5-C0. Character type. The 6 character type bits define one of the 64 available character types. These character types are shown on the following pages. Character Types The character set is user defined as ROM mask option. Register and RAM Addressing The OSD contains seven registers and 80 RAM lo- cations. The seven registers are the Vertical Start Address register, Horizontal Start Address regis- ter, Vertical Space register, Horizontal Space reg- ister, Background Control register, Global Enable register and Character Bank Select register. The Global Enable register can be written at any time by the ST631xx Core. The other six registers and the RAM can only be read or written to if the global enable is zero. The six registers and the RAM are located on two pages of the paged memory of the ST631xx MCUs; the Character Bank Select register is lo- cated outside the paged memory at address EDh. Each page contains 64 memory locations. This paged memory is at memory locations 00h to 3Fh in the ST631xx memory map. A page of memory is enabled by setting the desired page bit, located in the Data Ram Bank Register, to a one. The page register is location E8h. A one in bit five selects page 5, located on the OSD and a one in bit 6 se- lects page 6 on the OSD. Table 15 shows the ad- dresses of the OSD registers and RAM. ® ST63140,142,126,156 47/82 |
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