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Target Board Information
STMicroelectronics STx7105 MBoard (mb680)

Contents

Board name	STx7105 MBoard
Board Id	mb680
Chip	STx7105
Target CPU	ST40-300
Memory	256Mb
Flash	noneMb
STEM connector	Yes
On board Ethernet	on-chip

This board was designed as a silicon validation platform for the STx7105. It is designed to be used as the processor board with an I/O board, for example the mb705, however it can also be used stand alone.

Hardware Setup

Switch settings

Some jumper settings depend on whether the mb680 is plugged into an IO board or not.

Function	Standalone	IO board
STEM 0 interrupt	J4 1-2 and J2-A fitted	J4 1-2 and J2-A not fitted
STEM 1 interrupt	J2-B fitted	J2-B not fitted
STEM 0 CS	J14A 1-2	J14A 2-3
STEM 1 CS	J14B 1-2	J14B 2-3

Serial ports

If using the mb680 standalone, the the serial ports are only available as 5 pin headers. These require a special cable to be built which includes a driver to generate RS232 compatible signals.

Alternativly, if using the mb705 then standard 9 pin D connectors are available.

Chip name	Device	Type	mb680			mb705
Chip name	Device	Type	Header	Name	Cable Type	Pannel name	Connector	Cable Type
UART2	/dev/ttyAS0	ASC	CN7	COM0	Custom	COM0	CN12 lower	Null modem
UART3	/dev/ttyAS1	ASC	CN8	COM1	Custom	COM1	CN12 upper	Null modem

STMC usage

The mb680 is configured using a targetpack provided with the stmc package. The configuration name is mb680.

EMI config	stlinux23-host-stmc-1.1.1-10 or later
Boot script name	mb680:st40

If using a Micro Connect II with the LVDS connector on the mb705, you may get the error message:

Fatal Error: TargetPack error: check_convertor_code(): Unknown convertor found with code 6

In this case add the option: no_convertor_abort=1 to the target pack command line.

Note that on early revisions of this board it may be necessary to slow down the LMI to make it reliable. This can be done by appending the option lmi_2xfreq, for example: lmi_2xfreq=400.

GMAC

To use the embedded GMAC on board you need to have the following setup:

SW8 configuration
1	2	3	4
OFF	OFF	OFF	OFF

SW9 configuration
1	2	3	4
ON	OFF	OFF	OFF

USB port configuration

Note that USB port configuration depends on jumper settings.
Put jumpers to normal settings.

                PORT 0  SW            PORT 1  SW
              ________________________________________
 OC   normal    4[4]    J5A 2-3          4[6]   J10A 2-3
      alt      12[5]    J5A 1-2         14[6]   J10A 1-2
 PWR  normal    4[5]    J5B 2-3          4[7]   J10B 2-3
      alt      12[6]    J5B 1-2         14[7]   J10B 1-2

Contents