AD7877
目录
规格................................................. .................................... 3
时序规格................................................ ....................... 5
绝对最大额定值............................................... ............. 6
ESD注意事项................................................ .................................. 6
引脚配置和功能说明............................. 7
术语................................................. ..................................... 9
典型性能特征........................................... 10
电路信息................................................ ........................ 14
触摸屏原理............................................... ............. 14
测量触摸屏输入.............................................. 15
触摸压力测量.............................................. .... 16
STOPACQ引脚................................................ ............................ 16
温度测量................................................ ....... 17
电池测量................................................ ................. 18
辅助输入................................................ .......................... 19
限制比较................................................ ...................... 19
控制寄存器................................................ ............................ 20
控制寄存器1 ............................................... ........................ 20
控制寄存器2 ............................................... ........................ 21
音序器寄存器................................................ ................... 22
中断................................................. .................................... 24
Syncronizing的AD7877到主机CPU ........................... 25
8位DAC .............................................. .......................................... 26
串行接口................................................ ................................ 28
写数据................................................ ............................... 28
写时序................................................ ............................... 29
读取数据................................................ ............................... 29
V
DRIVE
销................................................. .................................... 29
通用I / O引脚........................................... .................. 30
GPIO配置................................................ .................. 30
接地和布局............................................... .................. 32
PCB设计指南芯片级封装................... 32
寄存器映射................................................ .................................. 33
详细寄存器说明............................................... ...... 35
GPIO寄存器................................................ ........................... 41
外形尺寸................................................ ....................... 43
订购指南................................................ .......................... 43
修订历史
11月4日，改从版本0到版本A
更改绝对最大额定值...................................... 6
图4 ..............................................变化............................ 7
更改表4 .............................................. .............................. 7
更改接地和布局部分................................ 32
图42 ..............................................变化........................ 32
更改订购指南.............................................. ............ 43
7月4日 - 修订版0 ：初始版
版本A |页44 2
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