dank deine tips bin icgh weiter gekommen target pack hab ich aus ein update pack von stlinux der pfad angepasst in der sttp.xml und jezt bebomm ich diese ausgabe
(di box war nicht angeschlossen)

(gdb) sh4tp STMCLT1000A:mb680:st40
The target is assumed to be little endian
The target architecture is assumed to be sh4

***
*** 'mb680' targetpack v32 starting
***

mb680 connect start - parameters {}
Initialization TCK frequency set to 3000000 Hz
SHDEBUG [ERROR] :: Unable to initialise target with target pack STMCLT1000A:mb68
0:st40 (Fatal Error: TargetPack error: Read a device id of 0x00000000. Please ch
eck the connection to the target and ensure jtagpinout is specified correctly)
SHDEBUG [ERROR] :: Unable to initialise target with target pack STMCLT1000A:mb68
0:st40
Unable to connect to remote target STMCLT1000A:mb680:st40
(gdb)