Scsi timer one (stime1), Register: 0x49 – Avago Technologies LSI53C1000R User Manual
Page 193
SCSI Registers
4-81
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
Register: 0x49
SCSI Timer One (STIME1)
Read/Write
R
Reserved
7
HTHBA
Handshake-to-Handshake Timer Bus Activity
Enable
6
Setting this bit causes this timer to begin testing for SCSI
REQ/ and 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.
Refer to the
register
description for details.
7
6
5
4
3
0
R
HTHBA
GENSF
HTHSF
GEN[3:0]
x
0
0
0
0
0
0
0
HTH[3:0], SEL[3:0], GEN[3:0]
Minimum Time-out
HTHSF = 0,
GENSF = 0
HTHSF = 1,
GENSF = 1
0000
Disabled
Disabled
0001
125
µ
s
2 ms
0010
250
µ
s
4 ms
0011
500
µ
s
8 ms
0100
1
µ
s
16 ms
0101
2 ms
32 ms
0110
4 ms
64 ms
0111
8 ms
128 ms
1000
16 ms
256 ms
1001
32 ms
512 ms
1010
64 ms
1 s
1011
128 ms
2 s
1100
256 ms
4.1 s
1101
512 ms
8.2 s
1110
1.024 s
16.4 s
1111
2.048 s
32.8 s