
M TECHNOLOGY, INC.

R552 PENTIUM PCI/ISA

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     128MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          304mm x 244mm
I/O Options         32-bit PCI slots (4), floppy drive interface, green PC
                    connector, IDE interfaces (2), parallel port, PS/2
                    mouse port, serial ports (2), cache slot, USB
                    connectors (2), ATX power connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  ATX power connector        ATX       Speaker                     J2

  Serial port 2              CN1       Reset switch                J3

  Parallel port              CN2       Green PC connector          J4

  PS/2 mouse port            CN3       IDE interface LED           J5

  Serial port 1              CN4       32-bit PCI slots         PC1 - PC4

  Floppy drive interface     CN5       Cache slot                 SL1

  IDE interface 1            CN6       USB connector 1            USB1

  IDE interface 2            CN7       USB connector 2            USB2

  Power LED & keylock         J1

                        USER CONFIGURABLE SETTINGS

                  Function                      Label        Position

     CMOS memory normal operation              JP14           Open

      CMOS memory clear                         JP14          Closed

      Monitor type select CGA                   JP15          Closed

      Monitor type select                       JP15           Open
      monochrome/EGA/VGA

     PS/2 mouse enabled                        JP16         Pins 1 & 2
                                                              closed

      PS/2 mouse disabled                       JP16         Pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

          Size                    Bank 0                   Bank 1

           4MB                (2) 512K x 36                 None

           6MB                (2) 512K x 36            (2) 256K x 36

           8MB                 (2) 1M x 36                  None

           8MB                (2) 512K x 36            (2) 512K x 36

          12MB                 (2) 1M x 36             (2) 512K x 36

          16MB                 (2) 2M x 36                  None

          16MB                 (2) 1M x 36              (2) 1M x 36

          20MB                 (2) 2M x 36             (2) 512K x 36

          24MB                 (2) 2M x 36              (2) 1M x 36

          32MB                 (2) 4M x 36                  None

          32MB                 (2) 2M x 36              (2) 2M x 36

          36MB                 (2) 4M x 36             (2) 512K x 36

          40MB                 (2) 4M x 36              (2) 1M x 36

          48MB                 (2) 4M x 36              (2) 2M x 36

          64MB                 (2) 8M x 36                  None

          64MB                 (2) 4M x 36              (2) 4M x 36

          68MB                 (2) 8M x 36             (2) 512K x 36

          72MB                 (2) 8M x 36              (2) 1M x 36

          80MB                 (2) 8M x 36              (2) 2M x 36

          96MB                 (2) 8M x 36              (2) 4M x 36

          128MB                (2) 8M x 36              (2) 8M x 36

            Note: Board accepts EDO memory. If these configurations are
            used, DIMM sockets must be empty. Board also accepts x 32
            SIMMs.

                           DIMM CONFIGURATION

          Size                  Bank 2                  Bank 3

          8MB                 (1) 1M x 64                None

          16MB                (1) 2M x 64                None

          16MB                (1) 1M x 64             (1) 1M x 64

          24MB                (1) 2M x 64             (1) 1M x 64

          32MB                (1) 4M x 64                None

          32MB                (1) 2M x 64             (1) 2M x 64

          40MB                (1) 4M x 64             (1) 1M x 64

          48MB                (1) 4M x 64             (1) 2M x 64

          64MB                (1) 8M x 64                None

          64MB                (1) 4M x 64             (1) 4M x 64

          72MB                (1) 8M x 64             (1) 1M x 64

          80MB                (1) 8M x 64             (1) 2M x 64

          96MB                (1) 8M x 64             (1) 4M x 64

         128MB                (1) 8M x 64             (1) 8M x 64

  Note: If these configurations are used, DIMM sockets must be empty.

                DIMM VOLTAGE CONFIGURATION

           Voltage                       JP10

            3.3v              Pins 3 & 5, 4 & 6, closed

             5v                Pins 1 & 3, 2 & 4 closed

                            CACHE CONFIGURATION

       Size            Bank 0               SL1                 TAG

      256KB         (2) 32K x 32       Not installed        (1) 32K x 8

      512KB         (2) 32K x 32        256KB module        (1) 32K x 8
                                         installed

      512KB         (2) 64K x 32        256KB module        (1) 32K x 8
                                         installed

                           CPU SPEED SELECTION (CYRIX)

   CPU     Clock   Multiplier    JP6      JP7     JP8    JP500    JP501    JP502
  speed    speed

  120MHz   50MHz       2x        Open    Closed   Open   Open     Open     Open

  133MHz   55MHz       2x        Open    Closed   Open   Closed   Open     Open

  150MHz   60MHz       2x       Closed   Closed   Open   Open     Open     Closed

  166MHz   66MHz       2x        Open    Closed   Open   Open     Closed   Open

                           CPU SPEED SELECTION (AMD)

   CPU     Clock   Multiplier    JP6     JP7    JP8    JP500   JP501    JP502
  speed    speed

  75MHz    50MHz      1.5x       Open    Open   Open   Open    Open     Open

  90MHz    60MHz      1.5x      Closed   Open   Open   Open    Open     Closed

  100MHz   66MHz      1.5x       Open    Open   Open   Open    Closed   Open

                            CPU SPEED SELECTION (INTEL)

   CPU     Clock   Multiplier    JP6      JP7      JP8     JP500   JP501    JP502
  speed    speed

  75MHz    50MHz      1.5x       Open     Open     Open    Open    Open     Open

  90MHz    60MHz      1.5x      Closed    Open     Open    Open    Open     Closed

  100MHz   66MHz      1.5x       Open     Open     Open    Open    Closed   Open

  120MHz   60MHz       2x       Closed   Closed    Open    Open    Open     Closed

  133MHz   66MHz       2x        Open    Closed    Open    Open    Closed   Open

  150MHz   60MHz      2.5x      Closed   Closed   Closed   Open    Open     Closed

  166MHz   66MHz      2.5x       Open    Closed   Closed   Open    Closed   Open

  180MHz   60MHz       3x       Closed    Open    Closed   Open    Open     Closed

  200MHz   66MHz       3x        Open     Open    Closed   Open    Closed   Open

                 CPU VOLTAGE SELECTION (SINGLE POWER CPU)

      CPU type             Voltage             JP5              JP9

  CX M1/AM K5/P54C           3.3v         1 & 2, 3 & 4,    1 & 2, 3 & 4
                                              5 & 6

  CX M1/AM K5/P54C          3.45v         1 & 2, 3 & 4,        1 & 2
                                              5 & 6

  CX M1/AM K5/P54C           3.5v         1 & 2, 3 & 4,        Open
                                              5 & 6

  Note: Pins designated should be in the closed position.

                   CPU VOLTAGE SELECTION(DUAL POWER CPU)

  CPU type     Voltage 1     Voltage 2       JP5        JP9        JP19

    P55C         3.3v          2.5v         Open      1 & 2, 3   1 & 2, 3
                                                        & 4        & 4

    P55C         3.45v         2.7v         Open       1 & 2      1 & 2

    P55C         3.5v          2.8v         Open       Open        Open

  Note: Pins designated should be in the closed position.

                     FLASH BIOS SELECTION

       Voltage               JP17                 JP18

        None           Pins 1 & 2 closed   Pins 1 & 2 closed

         5v            Pins 1 & 2 closed   Pins 2 & 3 closed

         12v           Pins 2 & 3 closed   Pins 2 & 3 closed

