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MC141540 bảng dữ liệu(PDF) 6 Page - Motorola, Inc |
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MC141540 bảng dữ liệu(HTML) 6 Page - Motorola, Inc |
6 / 12 page MC141540 MOTOROLA 6 REGISTERS Display Register 0 1 2 3 4 5 6 7 CCS0 CRADDR Bit 7 CCS0 — This bit defines a specific character color out of the two preset colors. Color 1 is selected if this bit is cleared, and Color 2 otherwise. Bit 6–0 CRADDR — These seven bits address the 128 characters or symbols residing in the character ROM. Row Control Registers Coln 30 0 1 2 3 4 5 6 7 CWS CHS B2 G2 R2 B1 G1 R1 COLN 30 Bits 7–2 — Color 1 is determined by R1, G1, and B1; Color 2 by R2, G2, and B2. Bit 1 CHS — This bit determines the height of a display symbol. When it is set, the symbol is displayed in double height. Bit 0 CWS — Bit 0 is similar to Bit 1; when this bit is set, the character is displayed in double width. Coln 31 0 1 2 3 4 5 6 7 B4 G4 R4 B3 G3 R3 COLN 31 Bits 7–2 — Color 3 is determined by R3, G3, and B3; Color 4 by R4, G4, and B4. Window 1 Registers Row 10 Coln 0, 3, or 6 0 1 2 3 4 5 6 7 ROW END ADDR MSB LSB ROW START ADDR MSB LSB COLN 0, ROW 10 3, or 6 Row 10 Coln 1, 4, or 7 WEN CCS1 COL START ADDR MSB LSB COLN 1, 0 1 2 3 4 5 6 7 ROW 10 4, or 7 Bit 2 WEN — This bit enables the background Window 1 generation when it is set. Bit 1 CCS1 — This additional color select bit provides the characters residing within Window 1 with two extra color selections, making a total of four selections for that row. Row 10 Coln 2, 5, or 8 RG COL END ADDR MSB LSB COLN 2, 0 1 2 3 4 5 6 7 B ROW 10 5, or 8 Window 1 occupies Columns 0–2 of Row 10; Window 2 occupies Columns 3–5; and Window 3 occupies Columns 6–8. Window 1 has the highest priority, and Window 3 the least. If window overlapping occurs, the higher priority win- dow will cover the lower one, and the higher priority color will take over on the overlap window area. If the start address is greater than the end address, this window will not be dis- played. Frame Control Registers Coln 9 0 1 2 3 4 5 6 7 LSB COLN 9 MSB VERTD Bit 7–0 VERTD — These six bits define the vertical starting position. There are a total of 64 steps, with an increment of four horizontal lines per step for each field. The value cannot be zero anytime, and the default value is 4. Coln 10 0 1 2 3 4 5 6 7 LSB COLN 10 MSB HORD Bit 6–0 HORD — These bits define the horizontal starting position for character display. Five bits give a total of 32 steps and each increment represents a five–dot shift to the right on the monitor screen. The value cannot be zero any- time, and the default value is 5. Coln 11 7 COLN 11 65 4 3 2 1 0 CH5 CH4 CH3 CH2 CH1 CH0 Bit 5–0 CH5–CH0 — These six bits determine the dis- played character height. It is possible to have a proper char- acter height by setting a value greater than or equal to 16 on a different horizontal frequency monitor. Setting a value be- low 16 will not have a predictable result. Figure 6 illustrates how this chip expands the built–in character font to the de- sired height. Coln 12 7 OSD_EN COLN 12 65 43 21 0 BSEN SHADOW FBKGC Bit 7 OSD_EN — The OSD circuit is activated when this bit is set. Bit 6 BSEN — This bit enables the character bordering or shadowing function when it is set. Bit 5 SHADOW — Characters with black–edge shadowing are selected if this bit is set; otherwise bordering prevails. Bit 0 FBKGC — Bit 0 determines the configuration of the FBKG output pin. When it is clear, the FBKG pin outputs high while displaying characters or windows; otherwise, the FBKG pin outputs high only while displaying characters. |
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