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參數(shù)資料
| 型號(hào)： | SAA567X |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| 中文描述： | 與微控制器在強(qiáng)化電視屏幕顯示（OSD） |
| 文件頁(yè)數(shù)： | 11/116頁(yè) |
| 文件大小： | 532K |
| 代理商： | SAA567X |
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2002 May 06
11
Philips Semiconductors
Objective specification
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA567x; SAA569x
8.2
ROM protection and verification
SAA567x; SAA569x devices have a set of security bits
allied with each section of the device, i.e. Program ROM,
Character ROMandPacket 26 ROM.Thesecuritybitsare
used to prevent the ROM from being overwritten once
programmed, and also the contents being verified once
programmed.
The security bits can be programmed once only and
cannot
be erased.
The SAA567x; SAA569x security bits are set as shown in
Fig.4 for production programmed devices and are set as
shown in Fig.5 for production blank devices.
handbook, full pagewidth
GSA036
PROGRAM ROM
(128 or 192 kbytes)
MEMORY
USER ROM PROGRAMMING
VERIFY
DISABLED
ENABLED
DISABLED
ENABLED
DISABLED
ENABLED
SECURITY BITS SET
CHARACTER ROM
(12 kbytes)
PACKET 26 ROM
(4 kbytes)
Fig.4 Security bits for production programmed devices.
handbook, full pagewidth
GSA037
PROGRAM ROM
(128 OR 192 kbytes)
MEMORY
USER ROM PROGRAMMING
VERIFY
ENABLED
ENABLED
ENABLED
ENABLED
ENABLED
ENABLED
SECURITY BITS SET
CHARACTER ROM
(12 kbytes)
PACKET 26 ROM
(4 kbytes)
Fig.5 Security bits for production blank devices.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5695HL | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA569x | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5677HL | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5700GP | Chinese Character System Teletext CCST decoder |
| SAA5700 | Chinese Character System Teletext CCST decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5695HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5697HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA569X | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5700 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Chinese Character System Teletext CCST decoder |
| SAA5700GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Chinese Character System Teletext CCST decoder |
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