crypto_router_pinmux.mdwn

   1 # NGI POINTER Gigabit Ethernet Router Pinmux
   2
   3 * NLnet page: [[nlnet_2021_crypto_router]]
   4 * Top-level bugreport: <https://bugs.libre-soc.org/show_bug.cgi?id=589>
   5 * ls180 packaging: <https://bugs.libre-soc.org/show_bug.cgi?id=508>
   6 * Main page: [[crypto_router_asic]]
   7 * Package Selection page: <https://www.greatek.com.tw/product6-en.html>
   8
   9 # Expected Package
  10
  11 * QFP 256 pin?
  12 * Largest option from Greatek: LQFP-256-0.4mm
  13   - LQFP
  14   - 28x28mm size
  15   - 256 pins
  16   - 0.4mm pitch
  17   - 1.0mm lead length
  18   - body height 1.4mm
  19
  20 # Functionality and Pincount (NOT FINAL, LIKELY TO CHANGE):
  21
  22 Essential:
  23
  24 * 5x RGMII Ethernet - 5x20 = 100 pins [[shakti/m_class/RGMII/]]
  25 * 2x USB ULPI - 2x12 = 24 pins [[shakti/m_class/ULPI/]]
  26 * SDRAM - 39 pins [[shakti/m_class/sdram/]]
  27 * UART - 2 pins
  28 * JTAG - 4 pins [[shakti/m_class/JTAG/]]
  29 * 1.8v Core Power Vdd - 13 pins
  30 * 1.8v Core Power Vss - 13 pins
  31 * 3.3v IO Power Vdd - 10 pins
  32 * 3.3v IO Power Vss - 10 pins
  33 * Reset - 1 pin
  34 * PLL - 5 pins
  35 * SPI - 4 pins [[shakti/m_class/SPI/]]
  36
  37 non-essential:
  38
  39 * GPIO - 16 pins
  40 * EINT - 3 pins
  41 * I2C - 2 pins
  42 * QSPI - Could share with SPI - 6 pins [[shakti/m_class/QSPI/]]
  43 * SD/MMC - Could share with SPI - 4 pins
  44
  45 Total: **256** pins
  46
  47 GPIO, EINT, Vdd, Vss, SDRAM, reset, PLL pin counts come from the LS180 pinmux definitions.
  48
  49 RGMII pinout count comes from [here](https://web.pa.msu.edu/hep/atlas/l1calo/hub/hardware/components/micrel/rgmii_specification_hp_v1.3_dec_2000.pdf)