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| 型號： | MAX7456EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 35/44頁 |
| 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 |
| 標準包裝： | 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)動器 |
| 次要屬性： | GUI，SPI 接口 |
| 已供物品： | 板 |
| 產(chǎn)品目錄頁面： | 1424 (CN2011-ZH PDF) |
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4) 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.
5) Write CA data in the intended character order to dis-
play text on the screen. It will be stored along with a
Character Attribute byte derived from DMM[5:3].
See Figure 19. This is the single byte operation. The
DMDI[7:0] address is automatically set by auto-
increment mode. The display memory address is
automatically incremented following the write opera-
tion 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.
Steps for Reading from Display
Memory in 8-Bit Mode
1) Write DMM[6] = 1 to select the 8-bit operation mode.
2) Write DMAH[1] = 0 to read the Character Address
byte or DMAH[1] = 1 to read the Character Attribute
byte.
3) Write to DMAH[0] to select the MSB of the address
where data must be read from (Figure 10).
4) Write to DMAL[7:0] to select all the lower order bits,
except for the MSB, of the address where data must
be read from (Figure 10).
5) Read DMDO[7:0] to read the data from the selected
location in the display memory (Figure 10).
Steps for Reading from Display
Memory in 16-Bit Mode
1) Write DMM[6] = 0 to select the 16-bit operation
mode.
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 read.
This address determines the location of the charac-
ter on the display (see Figure 10).
3) Read DMDO[15:0] to read the Character Address
byte and the Character Attribute byte from the
selected location in the display memory. The first
data byte is the Character Address (CA[7:0]), and
the second byte contains the Character Attribute
bits (Figure 20). Note that the bit positions of the
Character Attribute byte when read, differ from
when they are written. See the
Display Memory Data
Out Register (DMDO) section and Figure 20 for a
description of the bit locations of the attribute bits
when reading.
Note: If an internal display-memory read request
occurs simultaneously with an SPI display-memory
operation, the internal read request is ignored, and the
display of that character, during that field time, may
appear to momentarily break up. See the
Synchronous
OSD Updates section.
Synchronous OSD Updates
The display of a character may momentarily appear to
break up if an internal display-memory read request
occurs simultaneously with an SPI display-memory
operation. Momentary breakup of the OSD image can
be prevented by writing to the display memory during
the vertical blanking interval. This can be achieved by
using VSYNC as an interrupt to the host processor to
initiate writing to the display memory. Alternatively, the
OSD image can be synchronously disabled before writ-
ing to the display memory and synchronously re-
enabled afterwards (see VM0[3:2]).
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
Table 5. Display-Memory Access Modes and SPI Operations
OPERATING
MODE
AUTO-INCREMENT
MODE DISABLED
DMM[0] = 0
No. OF READ
OPERATIONS
No. OF WRITE
OPERATIONS
AUTO-INCREMENT
MODE ENABLED
DMM[0] = 1
No. OF WRITE
OPERATIONS
One-time setup
2
1
One-time setup
6
16-Bit Mode
DMM[6] = 0
Per character
3
Per character
1
One-time setup
1
One-time setup
6
8-Bit Mode
DMM[6] = 1
Per character
6
Per character
1
MAX7456
40
Maxim Integrated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7456EVKIT+ | 功能描述:顯示開發(fā)工具 MAX7456 Eval Kit RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
| MAX7457ETE | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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:視頻開關(guān) IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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:視頻開關(guān) IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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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