国民技术N32G430系列硬件设计指南

4110474 2022-11-07 | rar | 0.75 MB | 次下载 | 免费

资料介绍

1. N32G430 系列 MCU 硬件设计检查列表.................................................................................................. 1

1.1

供电电源简介........................................................................................................................... 1

1.2

VDD 供电方案......................................................................................................................... 1

1.3

外部引脚复位电路................................................................................................................... 1

1.4

外部时钟电路........................................................................................................................... 1

1.5

启动引脚连接........................................................................................................................... 2

1.6

独立 ADC 转换器.................................................................................................................... 2

1.7

IO 上电脉冲处理 ..................................................................................................................... 4

1.8

IO 耐压值 ................................................................................................................................. 5

1.9

防静电设计 .............................................................................................................................. 6

1.9.1

PCB 设计......................................................................................................................... 6

1.9.2

ESD 防护器件................................................................................................................. 6

1.10

调试接口 .................................................................................................................................. 7

1.11

BOOT 串口接口....................................................................................................................... 7

2. 整体设计建议.............................................................................................................................................. 7

3. 最小系统参考设计原理图.......................................................................................................................... 9

3.1

LQFP48..................................................................................................................................... 9

3.2

LQFP32................................................................................................................................... 10

3.3

QFN20 .....................................................................................................................................11

3.4

QFN28 .................................................................................................................................... 12

3.5

QFN32 .................................................................................................................................... 13

3.6

QFN48 .................................................................................................................................... 14

3.7

TSSOP20 ................................................................................................................................ 15

4. PCB LAYOUT 参考 ................................................................................................................................. 16

5. 典型故障分析............................................................................................................................................ 17

5.1.1

电源管脚与地短路 ....................................................................................................... 17

5.1.2

GPIO 损坏..................................................................................................................... 17

5.1.3

ADC 采样不准.............................................................................................................. 17

6. 历史版本.................................................................................................................................................... 18

7. 声明.......................................................................................................................................................... 19