Information/MIPSelOverview

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mipsel-hdhlan

Serial Console | Adding a serial interface is difficult as the only serial port is connected to the AVR microcontroller. Several Japanese LinkStation owners [have succeeded] used the one serial port for other purposes. Please help out by translating the Japanese BBS page or providing schematics.


Main Boad

The following hardware can be found on the main board:

  • [IDT 79RC32434-400BC] Integrated Communications Processor, containing
    • 32-bit @ 400MHz MIPSel CPU core (el -> le -> little endian) with MIPS32 instructions set architecture. Based on the MIPS 4Kc core.
    • 10/100Mb Ethernet channel {:MII:Media Independent Interface}/{:RMII:Reduced Media Independent Interface} interface controller
    • Serial UART, 16550 compatible
    • DDR memory controller, can handle up to 256MB
    • general purpose memory controller
    • PCI controller
    • DMA controller
    • I'^2^'C bus
    • general purpose I/O connectors
    • JTAG interface (hardware-supported debugging)
    • Watchdog timer
    • No FPU (floating point is done via software emulation)
  • [8201CP 'PHYceiver'] - Physical Ethernet tranceiver, connected to the ICP's Ethernet channel
  • RAM - 64MB Micron MT 46V32MI6-SBC SDRAM
  • Flash ROM - 4MB [Macronix] MX29LV320T.
  • [IT8211 PCI IDE disk controller]. The stock kernel driver reports an IT8212 (an IDE RAID 0/1/0+1 controller). However, there is indeed only a IT8211 on the board.
  • USB - 2 type A connectors (rear - /dev/usb/lp0, front - /dev/usb/lp1) - [NEC D720101GJ]. The NEC chip supports five USB interfaces, of which only two are connected to the two plugs. Experienced tinkerer can try to add more USB plugs, according to [this here].


Periphery

IDE 3.5" Disk

  • LS120: Samsung SP1203N
  • LS160: Western Digital WD1600
  • LS250: Samsung SP2514N
  • LS300: ?


Power Supply

  • 25W [Co., Ltd.] "open frame" dual voltage power supply, from the UOP25D/325D series ([[1]], [[2]]). The power supply is actually a "brick" power supply without the usual plastic case. The UOP25D/325D series comes in different variations. The differences are the input voltage ranges, and the maximum output current and output voltage stability. 5V ±5%, 0.1A - 2A and 12V ±6%, 0.1A - 1.5A are typical output values.

Software

  • Stock Firmware - 2.x