SCSI Timing Diagrams
6-65
Table 6.44
SCSI-2 Fast Transfers 10.0 Mbytes (8-Bit Transfers) or
20.0 Mbytes (16-Bit Transfers) 40 MHz Clock
Symbol
Parameter
Min
Max
Units
t
ST1
Send SREQ/ or SACK/ assertion pulse width
30
–
ns
t
ST2
Send SREQ/ or SACK/ deassertion pulse width
30
–
ns
t
ST1
Receive SREQ/ or SACK/ assertion pulse width
22
–
ns
t
ST2
Receive SREQ/ or SACK/ deassertion pulse width
22
–
ns
t
ST3
Send data setup to SREQ/ or SACK/ asserted
24
–
ns
t
ST4
Send data hold from SREQ/ or SACK/ asserted
34
–
ns
t
ST5
Receive data setup to SREQ/ or SACK/ asserted
14
–
ns
t
ST6
Receive data hold from SREQ/ or SACK/ asserted
24
–
ns
Table 6.45
Ultra SCSI SE Transfers 20.0 Mbytes (8-Bit Transfers) or
40.0 Mbytes (16-Bit Transfers) Quadrupled 40 MHz Clock
1
1. Note: For fast SCSI, set the TolerANT Enable bit (bit 7 in
).
Symbol
Parameter
Min
Max
Unit
t
ST1
Send SREQ/ or SACK/ assertion pulse width
15
–
ns
t
ST2
Send SREQ/ or SACK/ deassertion pulse width
15
–
ns
t
ST1
Receive SREQ/ or SACK/ assertion pulse width
11
–
ns
t
ST2
Receive SREQ/ or SACK/ deassertion pulse width
11
–
ns
t
ST3
Send data setup to SREQ/ or SACK/ asserted
12
–
ns
t
ST4
Send data hold from SREQ/ or SACK/ asserted
17
–
ns
t
ST5
Receive data setup to SREQ/ or SACK/ asserted
6
–
ns
t
ST6
Receive data hold from SREQ/ or SACK/ asserted
11
–
ns
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...