AT89C51RD2/ED2

24.3

24.4

24.5

24.6

24.7

24.8

24.9

24.10

闪存寄存器和存储器映射............................................. ...................... 94

闪存状态............................................... ........................................ 97

存储器结构................................................ ...................................... 97

Bootloader的结构................................................ ................................... 97

ISP协议说明............................................... ................................. 102

功能说明................................................ ................................... 103

流程说明................................................ ............................................ 104

API调用说明............................................... ........................................ 112

25电气特性............................................... ..................... 114

25.1

25.2

25.3

绝对最大额定值............................................... ............................ 114

DC参数标准电压............................................. ............... 114

AC参数................................................ .............................................. 117

26订购信息............................................... ............................ 126

27包装信息............................................... ......................... 127

27.1

27.2

27.3

27.4

PLCC44 .........................................................................................................127

VQFP44 .........................................................................................................129

PLCC68 .........................................................................................................131

VQFP64 .........................................................................................................132

28文档修订历史.............................................. .................. 133

28.1

28.2

28.3

28.4

28.5

28.6

28.7

28.8

28.9

28.10

从4235A -04/03到4135B的变化 - 06/03 ..................................... ......... 133

改变从4235B -06/03到4235C - 08/03 ..................................... ......... 133

从4235C的变化 - 08/03到4235D - 12/03 ..................................... ....... 133

改变从4235D - 12/03至4235E - 04/04 ..................................... ........ 133

变化来自4235E - 04/04至4235F - 09/04 ..................................... ........ 133

从4235F的变化 - 09/04至08/05 4235G ...................................... ......... 133

从4235G 08/05变为4235H - 10/06 ...................................... ........ 133

改变从4235H - 10/06至4235I - 04/07 ..................................... ......... 133

从4235I的变化 - 04/07到4235J - 01/08 ..................................... .......... 133

从4235J变化 - 01/08至4235K - 05/08 ..................................... ........ 133

137

4235K–8051–05/08