4-32
Registers
EWS
Enable Wide SCSI
3
When this bit is cleared, all information transfer phases
are assumed to be eight bits, transmitted on SD[7:0]/ and
SDP0/. When this bit is asserted, data transfers are
performed 16 bits at a time; the least significant byte is
on SD[7:0]/ and SDP0/, and the most significant byte is
on SD[15:8]/ and SDP1/. Command, Status, and
Message phases are not affected by this bit. Because
Ultra160 DT SCSI transfers are always wide, this bit must
be set. If it is not set, a SGE interrupt will occur.
R
Reserved
[2:0]
Register: 0x04
SCSI Chip ID (SCID)
Read/Write
R
Reserved
7
RRE
Enable Response to Reselection
6
When this bit is set, the LSI53C1000 is enabled to
respond to bus-initiated reselection at the chip ID in the
and
registers. Note that the chip does not
automatically reconfigure itself to the initiator mode as a
result of being reselected.
SRE
Enable Response to Selection
5
When this bit is set, the LSI53C1000 is able to respond
to bus-initiated selection at the chip ID in the
and
registers. Note that the chip does not automatically
reconfigure itself to target mode as a result of being
selected.
R
Reserved
4
ENC[3:0]
Encoded Chip SCSI ID
[3:0]
These bits are used to store the LSI53C1000 encoded
SCSI ID. This is the ID which the chip asserts when
7
6
5
4
3
0
R
RRE
SRE
R
ENC[3:0]
x
0
0
x
0
0
0
0
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...