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參數資料
| 型號： | MAX7456EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 27/44頁 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX7456 |
| 產品培訓模塊： | 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），帶集成視頻驅動器 |
| 次要屬性： | GUI，SPI 接口 |
| 已供物品： | 板 |
| 產品目錄頁面： | 1424 (CN2011-ZH PDF) |
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Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
Character Memory Mode Register (CMM)
Write address = 08H, read address = 88H.
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.
X = Don’t care.
BIT
DEFAULT
FUNCTION
7–0
0000 0000
Only whole characters (54 bytes) can be written to or read from the nonvolatile character memory
(NVM) at one time. This is done through the (64 byte) shadow RAM (Figure 13). The shadow RAM is
accessed through the SPI port one byte at a time. The shadow RAM is written to and read from
NVM by the following procedures:
Writing to NVM
1010 XXXX = Write to NVM array from shadow RAM.
The 64 bytes from shadow RAM are written to the NVM array at the character-memory address
location (CMAH, CMAL) (Figure 13). The character memory is busy for approximately 12ms during
this operation. During this time, STAT[5] is automatically set to 1. The Character Memory Mode
register is cleared and STAT[5] is reset to 0 after the write operation has been completed. The user
does not need to write zeros afterwards.
Reading from NVM
0101 XXXX = Read from NVM array into shadow RAM.
The 64 bytes corresponding to the character-memory address (CMAH, CMAL) are read from the
NVM array into the shadow RAM (Figure 13). The character memory is busy for approximately 0.5s
during this operation. The CMM register is cleared after the operation is completed. The user does
not need to write zeros afterwards. During this time, STAT[5] is automatically set to 1. STAT[5] is
reset to 0 when the read operation has been complete.
If the display has been enabled (VM0[3] = 1) or the character memory is busy (STAT[5] = 1), NVM
read/write operation commands are ignored and the corresponding registers are not updated.
However, all the registers can be read at any time.
For all the character-memory operations, the character address is formed with Character Memory
Address High (CMAH[7:0]) and Character Memory Address Low (CMAL[7:0]) register bits (Figures
11, 12, and 13).
MAX7456
Maxim Integrated
33
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX7456EVKIT+ | 功能描述:顯示開發工具 MAX7456 Eval Kit RoHS:否 制造商:4D Systems 產品: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 IC RoHS:否 制造商:Texas Instruments 開關數量: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 IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開關數量: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 IC Video Switch for Dual SCART Connector RoHS:否 制造商:Texas Instruments 開關數量: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 IC RoHS:否 制造商:Texas Instruments 開關數量: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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