參數(shù)資料
型號(hào): MAX7456
廠商: Maxim Integrated Products, Inc.
英文描述: Single-Channel Monochrome On-Screen Display with Integrated EEPROM
中文描述: 集成了EEPROM的單通道、單色隨屏顯示器
文件頁(yè)數(shù): 34/43頁(yè)
文件大?。?/td> 604K
代理商: MAX7456
M
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
34
______________________________________________________________________________________
Character Memory Address High Register
(CMAH)
Write address = 09H, read address = 89H.
Read/write access: unrestricted.
To write to this register, the following conditions must
be met:
1) STAT[5] = 0, the character memory (NVM) is not
busy.
2) VM0[3] = 0, the OSD is disabled.
BIT
DEFAULT
FUNCTION
7–0
0000 0000
Character Memory Address Bits
These 8 bits point to a character in the character memory (256 characters total in NVM) (Figures 10
and 12).
Character Memory Address Low Register
(CMAL)
Write address = 0AH, read address = 8AH.
Read/write access: unrestricted.
To write to this register, the following conditions must
be met:
1) STAT[5] = 0, the character memory (NVM) is not
busy.
2) VM0[3] = 0, the OSD is disabled.
BIT
7, 6
DEFAULT
00
FUNCTION
Don’t Care
5–0
00 0000
Character Memory Address Bits
These 6 bits point to one of the 64 bytes (only 54 used) that represent a 4-pixel group in the
character (Figures 10 and 11).
Character Memory Data In Register (CMDI)
Write address = 0BH, read address = 8BH.
Read/write access: unrestricted.
To write to this register, the following conditions must
be met:
1) STAT[5] = 0, the character memory (NVM) is not
busy.
2) VM0[3] = 0, the OSD is disabled.
BIT
7, 6
5, 4
3, 2
1, 0
DEFAULT
NA
NA
NA
NA
FUNCTION
Leftmost pixel. 00 = Black, 10 = White, 01 or 11 = Transparent (see Figure 11)
Left center pixel. 00 = Black, 10 = White, 01 or 11 = Transparent (see Figure 11)
Right center pixel. 00 = Black, 10 = White, 01 or 11 = Transparent (see Figure 11)
Rightmost pixel. 00 = Black, 10 = White, 01 or 11 = Transparent (see Figure 11)
NA = Not applicable.
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