I'm trying to design a board with micromod teensy to include both a PSRAM and sd card slots so I'm in need for the pins that these things use, 42-52.
It seems that the m.2 connector's pins 60-62-64-66-68-70 are dedicated to the sd card's 4-pin SDC/MMC interface. I can use that to connect to an sd card slot.
But I'm having trouble locating the PSRAM and extra FLASH connections, marked as 48-54. By cross comparing published Teensy 4.1 schematic and sparkfun's, I kind of mapped these:
Teensy sch. Sparkfun M.2
EMC-24 QSPI-CS
EMC-25 QSPI-CLK
EMC-26 QSPI-0
EMC-27 QSPI-1
EMC-28 QSPI-2
EMC-29 QSPI-3
So is the above the correct pins for PSRAM? Sparkfun also marked them as SD_B1_0x pins. They are not brought out to the M.2 slot. So I can't use PSRAM if I use sparkfun micromod, correct?
It seems that the m.2 connector's pins 60-62-64-66-68-70 are dedicated to the sd card's 4-pin SDC/MMC interface. I can use that to connect to an sd card slot.
But I'm having trouble locating the PSRAM and extra FLASH connections, marked as 48-54. By cross comparing published Teensy 4.1 schematic and sparkfun's, I kind of mapped these:
Teensy sch. Sparkfun M.2
EMC-24 QSPI-CS
EMC-25 QSPI-CLK
EMC-26 QSPI-0
EMC-27 QSPI-1
EMC-28 QSPI-2
EMC-29 QSPI-3
So is the above the correct pins for PSRAM? Sparkfun also marked them as SD_B1_0x pins. They are not brought out to the M.2 slot. So I can't use PSRAM if I use sparkfun micromod, correct?