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S908QY4ACDTE

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S908QY4ACDTE 技术参数

Addendum to MC68HC908QY4A, rev. 3

This addendum introduces a change to this data sheet.

Chapter 15 Development Support, Section 15.3.2 Security

A security feature discourages unauthorized reading of FLASH locations while in monitor mode. The host

can bypass the security feature at monitor mode entry by sending eight security bytes that match the

bytes at locations $FFF6–$FFFD. Locations $FFF6–$FFFD contain user-defined data.

NOTE

Do not leave locations $FFF6–$FFFD blank. For security reasons, program

locations $FFF6–$FFFD even if they are not used for vectors.

Changes to:

Chapter 15 Development Support, Section 15.3.2 Security

A security feature discourages unauthorized reading of FLASH locations while in monitor mode. The host

can bypass the security feature at monitor mode entry by sending eight security bytes that match the

bytes at locations $FFF6–$FFFD. Locations $FFF6–$FFFD contain user-defined data.

NOTE

Do not leave locations $FFF6–$FFFD blank. For security reasons, program

locations $FFF6–$FFFD even if they are not used for vectors. An improved

security function denies monitor mode entry if five or more of the eight

security bytes are $00 (zero bytes).

MC68HC908QY4A Data Sheet, Addendum 5/2012

Freescale Semiconductor

12 3 4 5 6 7...202

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型号	品牌	获取价格	描述	数据表
S908QY4AD1CDT	NXP	获取价格	8-BIT, FLASH, 8MHz, MICROCONTROLLER, PDSO16, 0.65 MM PITCH, TSSOP-16
S908QY4AD1CDTE	FREESCALE	获取价格	M68HC08 Microcontrollers
S908QY4AD1CDW	NXP	获取价格	8-BIT, FLASH, 8MHz, MICROCONTROLLER, PDSO16, 1.27 MM PITCH, MS-013AA, SOIC-16
S908QY4AD1CDWE	FREESCALE	获取价格	M68HC08 Microcontrollers
S908QY4AD1MDT	NXP	获取价格	8-BIT, FLASH, 8MHz, MICROCONTROLLER, PDSO16, 0.65 MM PITCH, TSSOP-16
S908QY4AD1MDTE	FREESCALE	获取价格	M68HC08 Microcontrollers
S908QY4AD1MDW	NXP	获取价格	8-BIT, FLASH, 8MHz, MICROCONTROLLER, PDSO16, 1.27 MM PITCH, MS-013AA, SOIC-16
S908QY4AD1MDWE	FREESCALE	获取价格	M68HC08 Microcontrollers
S908QY4AD1VDT	NXP	获取价格	8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16, 0.65 MM PITCH, TSSOP-16
S908QY4AD1VDTE	FREESCALE	获取价格	M68HC08 Microcontrollers