草案

目录

1

2

3

4

4.1

4.2

4.3

4.4

AT91SAM7L128 / 64初探

产品特点..................................................................................................... 1

说明................................................. .............................................. 3

框图................................................ .......................................... 4

信号说明................................................ ................................... 5

封装和引脚排列............................................... .................................. 8

128引脚LQFP封装外形............................................ ........................... 8

128引脚LQFP封装引脚............................................ ............................ 9

144球LFBGA封装外形............................................ ........................ 10

144球LFBGA引脚............................................. ....................................... 11

5

电源注意事项................................................ ........................... 12

5.1

5.2

5.3

5.4

5.5

5.6

5.7

电源................................................ ................................................ 12

低功耗模式............................................... ............................................ 12

唤醒源.............................................. .............................................. 14

快速启动...................................................................................................14

电压调节器................................................ ............................................ 15

LCD电源............................................... ........................................... 16

典型的打开电源原理图............................................... ........................... 18

6

I / O口线注意事项............................................. ............................ 19

6.1

6.2

6.3

6.4

6.5

6.6

6.7

JTAG端口引脚............................................... ................................................. 19

测试引脚...........................................................................................................19

NRST引脚.........................................................................................................19

NRSTB引脚......................................................................................................19

ERASE引脚......................................................................................................19

PIO控制器线............................................... ......................................... 20

I / O口线当前图形............................................ ..................................... 20

7

处理器和架构............................................... ................... 21

7.1

7.2

7.3

7.4

ARM7TDMI处理器................................................ ..................................... 21

调试和测试功能.............................................. .................................. 21

内存控制器................................................ ........................................... 21

外设DMA控制器............................................... ................................ 22

8

回忆................................................. ............................................... 23

8.1

嵌入式存储器................................................ ...................................... 25

i

6257A–ATARM–20-Feb-08