Forums - Bad J8 UEXT pinout information or bad silkscreen on SP140/SP144 dev kit

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Bad J8 UEXT pinout information or bad silkscreen on SP140/SP144 dev kit
douglas.turnbow
Join Date: 26 Nov 14
Posts: 11
Posted: Tue, 2014-12-23 09:37

While trying to connect my oscilloscope to the PS140/SP144 Development kit, I was using pin 1 on J8 as my ground point.  As soon as I connected the oscilloscope ground it killed the board (LED turned off, board unresponsive).

Upon checking the J8 UEXT connector, it looks like the pinout specified in the SP140 Development Platform Hardware Guide is wrong.  Or what is probably more likely is that the silkscreen on the board indicating pins 1 and 2 is wrong.

Pin Documented   Actual

1   GND                +3.3V

2   +3.3V               GND

3   UART_RXD     unable to verify yet, but assume this is actually UART_TXD

4   UART_TXD     corresponds to pin12 on the SP144 (UART0_TXD)

5   SPI_INT          CHIP_PWD#

6   CHIP_PWD#   SPI_INT

7   SPI_MOSI       SPI_MISO

8   SPI_MISO       SPI_MOSI

9   SPI_CS#         SPI_CLK

10 SPI_CLK         SPI_CS#

 Can we get the documentation and/or the silkscreen corrected?

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OranGu
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Join Date: 10 Oct 14
Location: San Jose
Posts: 33
Posted: Mon, 2015-01-05 15:00

thanks for the correction . We will check and fix . 

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