參數(shù)資料
型號(hào)： MAX7456EVKIT+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 33/44頁(yè)
文件大小： 0K
描述： KIT EVAL FOR MAX7456
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
主要目的： 視頻，屏幕顯示器（OSD）
嵌入式： 是，MCU，16 位
已用 IC / 零件： MAX7456
主要屬性： NTSC/PAL 單通道單色屏幕顯示器（OSD），帶集成視頻驅(qū)動(dòng)器
次要屬性： GUI，SPI 接口
已供物品： 板
產(chǎn)品目錄頁(yè)面： 1424 (CN2011-ZH PDF)
Writing the Character Address Byte to the Display
Memory:
1) Write DMAH[1] = 0 to write a Character Address
byte.
2) Write DMAH[0] = x to select the MSB and
DMAL[7:0] = xxH to select the lower order bits of
the address where the character data is to be writ-
ten. This address determines the location of the
character on the display (see Figure 10).
3) Write the Character Address byte (CA[7:0]) to be
written to the display memory to DMDI[7:0] (see
Figures 10, 12, and 19).
Writing the Character Attribute Byte to the Display
Memory:
1) Write DMAH[1] = 1 to write a Character Attribute
byte.
2) Write DMAH[0] = x to select the MSB and
DMAL[7:0] = xxH to select the lower order bits of
the address where the character data is to be writ-
ten. This address determines the location of the
character on the display (Figure 10).
3) Write the Character Attribute byte to be written to
the display memory to DMDI[7:0] (see Figures 10
and 19).
Steps for Writing to
Display Memory in 16-Bit Mode
The 16-bit operation mode increases the speed at
which the display memory can be updated. This is
done by automatically copying DMM[5:3] to a
Character’s Attribute byte when a new character is writ-
ten, thus reducing the number of SPI write operations
per character from two to one (Figure 19). When in this
mode, all characters written to the display memory
have the same attribute byte. This mode is useful
because successive characters commonly have the
same attribute. This mode is distinct from the 8-bit
operation mode where a Character Attribute byte must
be written each time a Character Address byte is writ-
ten to the display memory (see Table 5).
1) Write DMM[6] = 0 to select the 16-bit operation
mode.
2) Write DMM[5:3] = xxx to set the Local Background
Control (LBC), Blink (BLK), and Invert (INV) attribute
bits that will be applied to all characters written to
the display memory while in the 16-bit operation
mode.
3) Write DMAH[0] = x to select the MSB and
DMAL[7:0] = xxH to select the lower order bits of the
address where the character data is to be written.
This address determines the location of the charac-
ter on the display (see Figure 10).
4) Write the Character Address byte (CA[7:0]) to be
written to the display memory into DMDI[7:0]. It will
be stored along with a Character Attribute byte
derived from DMM[5:3] (Figures 12 and 19).
Steps for Writing to Display Memory
in Auto-Increment Mode
Auto-increment mode increases the speed at which the
display memory can be written by automatically incre-
menting the character address for each successive
character written. This mode is useful when writing
strings of characters written from left-to-right and top-
to-bottom on the display. This mode reduces the num-
ber of SPI commands (see Table 5).
When in 8-Bit Operating Mode:
1) Write DMAH[1] = 0 to select if the Character
Address byte will be written or DMAH[1] = 1 to
select if the Character Attribute byte will be written.
2) Write DMAH[0] = X to select the MSB and DMAL[7:0]
= XX to select the lower order address bits of the
starting address for auto-increment operation. This
address determines the location of the first character
on the display (see Figures 10 and 21).
3) Write DMM[0] = 1 to set the auto-increment mode.
4) Write DMM[6] = 1 to set the 8-bit operating mode.
5) Write CA data in the intended character order to dis-
play text on the screen. This is the single byte oper-
ation. The DMDI[7:0] address is automatically set by
auto-increment mode. The display memory address
is automatically incremented following the write
operation until the final display memory address is
reached.
6) Write CA = FFh to terminate the auto-increment
mode.
Note: The character stored at CA[7:0] = FFh is not avail-
able for use in auto-increment mode. Read operation is
not possible before auto-increment mode is terminated.
When in 16-Bit Operating Mode:
1) Write DMAH[0] = X to select the MSB and
DMAL[7:0] = XX to select the lower order address
bits of the starting address for auto-increment oper-
ation. This address determines the location of the
first character on the display (see Figures 10 and
21).
2) Write DMM[0] = 1 to set the auto-increment mode.
3) Write DMM[6] = 0 to set the 16-bit operating mode.
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
MAX7456
Maxim Integrated
39
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MAX7456EVKIT+ 功能描述:顯示開(kāi)發(fā)工具 MAX7456 Eval Kit RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評(píng)估:?OLED-160-G1, ?OLED-160-G2 接口類(lèi)型:Serial 工作電源電壓:5 V
MAX7457ETE 功能描述:視頻開(kāi)關(guān) IC RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
MAX7457ETE+ 功能描述:視頻開(kāi)關(guān) IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
MAX7457ETE+T 功能描述:視頻開(kāi)關(guān) IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
MAX7457ETE-T 功能描述:視頻開(kāi)關(guān) IC RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel
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