ADuC7121
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
功能框图............................................... ............... 1
修订历史................................................ ............................... 3
概述................................................ ......................... 4
规格................................................. .................................... 5
时序规格................................................ ................ 10
绝对最大额定值............................................... ........... 15
ESD注意事项................................................ ................................ 15
引脚配置和功能描述........................... 16
术语................................................. ................................... 20
ADC规格................................................ .................... 20
DAC规格................................................ ..................... 20
ARM7TDMI内核的概述............................................. 21
拇指模式（ T） ............................................. ........................... 21
长乘（M ） ............................................. ......................... 21
嵌入式ICE （我） .............................................. ......................... 21
例外情况................................................. .................................. 21
ARM寄存器................................................ ............................ 22
中断延迟................................................ ........................ 22
存储器结构................................................ ................... 23
内存访问................................................ ........................... 23
Flash / EE存储器.............................................. ......................... 23
SRAM ................................................. .......................................... 23
内存映像寄存器............................................... ........ 23
完成MMR上市............................................... .............. 24
ADC电路概述............................................... ................... 27
ADC传递函数............................................... .............. 27
温度传感器................................................ ................... 29
转换器操作................................................ .................. 31
驾驶模拟输入.............................................. .......... 33
带隙基准............................................... .................... 33
电源监控............................................... ................ 34
非易失性Flash / EE存储器............................................. ........ 35
Flash / EE存储器概述............................................. ........ 35
Flash / EE存储器.............................................. ......................... 35
Flash / EE存储器安全............................................. .......... 35
闪存/ EE控制接口............................................. ........... 36
执行从SRAM和FLASH时间/ EE ........................ 39
复位和重新映射............................................... ......................... 39
第0版|第96 2
其他模拟外设............................................... ............... 41
数字 - 模拟转换器............................................ ....... 41
LDO （低压差稳压器） ............................................ .... 43
电流输出DAC （ IDAC ） ............................................ ..... 43
IDAC孕产妇死亡................................................ ............................... 45
振荡器和PLL功耗控制........................................ 46
数字外设................................................ .......................... 50
PWM总体概述............................................... ............ 50
PWM转换启动控制.............................................. ...... 52
通用输入/输出............................................ ........ 53
UART串行接口............................................... ..................... 58
波特率发生器............................................... ................. 58
UART的寄存器定义............................................... .......... 58
I
2
外设................................................ ................................ 63
串行时钟发生器............................................... ............. 63
I
2
C总线地址............................................... ........................ 63
I
2
I2C寄存器................................................ ................................ 64
I
2
C ++常用寄存器............................................... ............... 72
串行外设接口............................................... .............. 73
SPI MISO （主，从机输出）引脚...................................... 73
SPI MOSI （主机输出，从机输入） ...................................... 73
SPICLK （串行时钟I / O）引脚......................................... ........ 73
SPI片选输入引脚............................................. ............. 73
配置外部引脚为SPI功能................... 73
SPI寄存器................................................ ................................ 73
可编程逻辑阵列（ PLA） ............................................ ... 76
解放军孕产妇死亡接口............................................... .................. 77
中断系统................................................ ............................. 80
正常的中断请求（ IRQ ） ............................................ 。 80
快速中断请求（ FIQ ） ............................................ ........ 81
外部中断（ IRQ0至IRQ3 ） ........................................ 85
定时器................................................. ............................................. 87
定时器0 -终身定时器.............................................. ............. 87
定时器，通用定时器........................................... 88
定时器2 ，唤醒定时器............................................ ............. 90
定时器3 ，看门狗定时器.............................................. .......... 91
定时器4 -通用定时器........................................... 93
外形尺寸................................................ ....................... 95
订购指南................................................ .......................... 95
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