File list (Check if you may need any files):
ek8681_2.doc
z537
....\rev_b
....\.....\distribn
....\.....\........\fw_20
....\.....\........\.....\atcmd.c
....\.....\........\.....\atcmd.h
....\.....\........\.....\bert.c
....\.....\........\.....\bert.h
....\.....\........\.....\cbus.c
....\.....\........\.....\cbus.h
....\.....\........\.....\chars.c
....\.....\........\.....\chars.h
....\.....\........\.....\dataxfer.c
....\.....\........\.....\dataxfer.h
....\.....\........\.....\delay.c
....\.....\........\.....\delay.h
....\.....\........\.....\ef8681.c
....\.....\........\.....\ef8681.h
....\.....\........\.....\EF868120.HEX
....\.....\........\.....\hndshake.c
....\.....\........\.....\hndshake.h
....\.....\........\.....\sci.c
....\.....\........\.....\sci.h
....\.....\........\manual_2
....\.....\........\........\de8681ds.pdf
....\.....\........\pcb_b
....\.....\........\.....\DE8681B01basicbom.xls
....\.....\........\.....\DE8681B01ctr21bom.xls
....\.....\........\.....\PCB024B_RLS.zip
....\.....\........\sw_20
....\.....\........\.....\PicprogF.exe