
BIT1612 10-Bit Digital Video Decoder with OSD and T-CON
59
R_SPI1690_DESYNC 0x0F5[4] RW 1 BIT1690 Interface – CMD Sync 0
R_SPI1690_CHECKER 0x0F5[3] RW 1 BIT1690 Interface – CMD Checker 0
R_SPI1690_ADDR 0x0F5[2:0] RW 3 BIT1690 Interface – ADDR 000
SRGB_OUT
ODE
TCLK
SDIO
R2 G2 B2 R3 G3 B3 R4 G4 B4
R5
R1 G1 B1
DAC
OCLK
Figure 6-38 BIT1690 Interface
6.32 OSD Function
The embedded OSD supports the following features:
1. Three OSD Windows
2. 128 Fixed FONT ROM / 48 User Programmable FONT RAM
3. 16 Characters Color User Programmable FONT RAM
4. 256 Characters Display RAM
5. Index-Based Display RAM Memory Management
6. Independent Zoom Ratio x0.5~x16 for Horizontal Direction
7. Independent Zoom Ratio x0.5~x8 for Vertical Direction
8. Programmable Vertical Direction Line Space
9. Fade IN/OUT Effect
10. 16 Color Palette Items (64 Colors)
11. Blink Display Effect
12. Fringe Font Effect
13. Fringe Window Effect
14. Vertical and Horizontal Directions Window Overlap
15. External OSD interface
6.32.1 OSD Windows Function
With the embedded OSD, BIT1612 supports at most 3 OSD windows at the same time. Please refer
to
Table 6-58 for related registers.
Table 6-58 OSD Windows Register
Mnemonic Address R/W Bits Description Default
R_W0_X 0x104[2:0], 0x102[7:0] RW 11 OSD0 Start X Position 0x196
R_W0_Y 0x104[5:4], 0x103[7:0] RW 10 OSD0 Start Y Position 0x014
R_W0_W 0x105[6:0] RW 7 OSD0 Width (in Characters) 0x06
R_W0_H 0x106[5:0] RW 6 OSD0 Height (in Characters) 0x01
R_W1_X 0x114[2:0], 0x112[7:0] RW 11 OSD1 Start X Position 0x033
R_W1_Y 0x114[5:4], 0x113[7:0] RW 10 OSD1 Start Y Position 0x03F
R_W1_W 0x115[6:0] RW 7 OSD1 Width (in Characters) 0x09
R_W1_H 0x116[5:0] RW 6 OSD1 Height (in Characters) 0x06
R_W2_X 0x124[2:0], 0x122[7:0] RW 11 OSD2 Start X Position 0x080
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