UART和SPI的电平转换资料~~（1504）

jlc12023

Contents
1 Introduction ................................................................................................................................................... 3
2 Using the 1504............................................................................................................................................... 4
2.1 Powering the 1504.................................................................................................................................. 4
2.2 Setting the interface voltage .................................................................................................................... 4
2.3 Connection to PC ................................................................................................................................... 4
2.4 Connection to target circuit ...................................................................................................................... 4
2.5 Check the SPI connection ....................................................................................................................... 4
2.6 Check the UART connection ................................................................................................................... 4
3 Circuit description ........................................................................................................................................ 5
3.1 Power supply .......................................................................................................................................... 5
3.1.1 DC inlet and 5V rail ...................................................................................................................... 5
3.1.2 3.3V rail....................................................................................................................................... 5
3.1.3 Interface voltage.......................................................................................................................... 5
3.1.4 SPI channel................................................................................................................................. 5
3.1.5 SPI_CSB, SPI_MOSI and SPI_CLK ............................................................................................ 5
3.1.6 SPI_MISO ................................................................................................................................... 6
3.1.7 SPI activity LEDs.......................................................................................................................... 6
3.2 UART channel ........................................................................................................................................ 6
3.2.1 Maximum Baud rate ..................................................................................................................... 6
3.2.2 UART LEDs ................................................................................................................................ 6
3.3 I/O protection .......................................................................................................................................... 6
3.3.1 ESD............................................................................................................................................. 6
3.3.2 Over-voltage and short circuit ...................................................................................................... 6
4 Notes.............................................................................................................................................................. 7
4.1 Repairing the 1504 ................................................................................................................................. 7
4.2 Copying the 1504 schematic ................................................................................................................... 7
4.3 1504 testing ............................................................................................................................................ 7
4.4 ESD and EMC ........................................................................................................................................ 7
5 Circuit Diagram ............................................................................................................................................. 7
Terms and Definitions ......................................................................................................................................... 8
Document History ................................................................................................................................................ 8
【文件名】:07123@52RD_SPI and UART Level Shifter.pdf
【格　式】:pdf
【大　小】:251K
【简　介】:
【目　录】:

Zhengrob

想找电路图的就别下载了，里面什么都讲了就是没有电路图。

junny

[em12][em12][em12]

taichung

Thanks up

fantasyfox

谢谢分享。

BlueBlue2009

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