Zoom V3 1612 Manual do Utilizador descarregar pdf (Página 78)

BIT1612 10-Bit Digital Video Decoder with OSD and T-CON

6.32.5 External OSD Interface

BIT1612 可連接外部 OSD 作為更複雜的 OSD 應用，共計可以顯示 8 種顏色。然而，因為 GIN Port

會被外部 OSD 佔用，在這樣情況下，BIT1612 無法支援 Graphic 輸入方式。

Table 6-62 External OSD Register

Mnemonic Address R/W Bits Description Default

External OSD Enable

0: Disable

R_EXTOSD_EN 0x100[0] RW 1

1: Enable

External OSD Blank Polarity

0: Normal

R_POL_EXTBNK 0x100[1] RW 1

1: Invert

External OSD HSYNC Polarity

0: Normal

R_POL_OSDHS 0x100[2] RW 1

1: Invert

External OSD VSYNC Polarity

0: Normal

R_POL_OSDVS 0x100[3] RW 1

1: Invert

External OSD CLOCK Polarity

0: Normal

R_POL_OSDCLK 0x100[4] RW 1

1: Invert

6.32.6 OSD User Programmable RAM Selection

以下 Register 用來選擇讀/寫 OSD User Programmable RAM 時所用的 Memory Bank。

Table 6-63 User Programmable RAM Selection

Mnemonic Address R/W Bits Description Default

User Programmable RAM Banks Selection

000

Bank 0, Mapping to User Font 0~7

(Mapping to R Color Font 0~7)

001

Bank 1, Mapping to User Font 8~15

(Mapping to R Color Font 8~15)

010

Bank 2, Mapping to User Font 16~23

(Mapping to G Color Font 0~7)

011

Bank 3, Mapping to User Font 24~31

(Mapping to G Color Font 8~15)

100

Bank 4, Mapping to User Font 32~39

(Mapping to B Color Font 0~7)

R_BANK_SEL 0x101[4:2] RW 3

101

Bank 5, Mapping to User Font 40~47

(Mapping to B Color Font 8~15)

000

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 114 115

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