Avago Technologies LSI8751D - Manual (Page 182)

5-66 SCSI Operating Registers
Register: 0x49 (0xC9)
SCSI Timer One (STIME1)
Read/Write
R Reserved 7
HTHBA Handshake-to-Handshake Timer Bus 6
Activity Enable
Setting this bit causes this timer to begin testing for SCSI
REQ/ACK activity as soon as SBSY/ is asserted,
regardless of the agents participating in the transfer.
GENSF General Purpose Timer Scale Factor 5
Setting this bit causes this timer to shift by a factor of 16.
7 6 5 4 3 0
R HTHBA GENSF HTHSF GEN[3:0]
x 0 0 0 0 0 0 0