lyrat 4.3 schematic
Posted: Sun Mar 29, 2020 5:31 pm
does anyone know what the pins are used for on lyrat 4.3?
Are they unconnected because they are 1.8v only ?
SPI_SD0
SPI_SD1
SPI_SD2
SPI_SD3
SPI_CMD
SPI_CLK
the TF_CARD uses these pins shared with JTAG connector
IO15
IO14
SD_IO13
SD_IO12
IO4
IO2
IO34
I removed the SD card and removed the 10k pullups so I can configure these pins for SPI an external peripheral.
IO15
IO14
IO4
IO2
IO34 maybe but input only
just wondering why these were not used for the SD CARD , avoid a logic level translator translator?
SPI_SD0
SPI_SD1
SPI_SD2
SPI_SD3
SPI_CMD
SPI_CLK
Are they unconnected because they are 1.8v only ?
SPI_SD0
SPI_SD1
SPI_SD2
SPI_SD3
SPI_CMD
SPI_CLK
the TF_CARD uses these pins shared with JTAG connector
IO15
IO14
SD_IO13
SD_IO12
IO4
IO2
IO34
I removed the SD card and removed the 10k pullups so I can configure these pins for SPI an external peripheral.
IO15
IO14
IO4
IO2
IO34 maybe but input only
just wondering why these were not used for the SD CARD , avoid a logic level translator translator?
SPI_SD0
SPI_SD1
SPI_SD2
SPI_SD3
SPI_CMD
SPI_CLK