TANDBERG SLR7, Reference Manual, Page: 73 / 118

Tandberg Data Hardware Interface
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Tandberg SLR Reference Manual 8-5
8.3.3. SCSI Interface Timing
# Symbol Description Min. (ns) Max. (ns) Note
Output and Input Cycles
1 tAAROH -ACK (in) low to -REQ (out) high 50
2 tAAROL -ACK (in) high to -REQ (out) low 50 a, b
3 tARAOH -REQ (in) high to -ACK (out) high 50
4 tARAOL -REQ (in) low to -ACK (out) low 50 b, d
Output Cycles
5 tARDSO Data setup to -REQ (out) low 60
5 tAADSO Data setup to -ACK (out) low 60
6 tARHDO Data hold from -REQ (in) high 20 c
6 tAAHDO Data hold from -ACK (in) low 30 c
Input Cycles
7 tAAROH -ACK (in) low to -REQ (out) high 50
8 tAAROL -ACK (in) high to -REQ (out) low 50 a, b
9 tARAOH -REQ (in) high to -ACK (out) high 50
10 tARAOL -REQ (in) low to -ACK (out) low 50 b, d
11 tARDSI Data setup to -REQ (in) low 0
11 tAADSI Data setup to -ACK (in) low 0
12 tARHDI Data hold from -REQ (in) low 15
12 tAAHDI Data hold from -ACK (in) low 15
TABLE NOTES:
a) tARDSO specification must also be met (output cycle only)
b) The FIFO is not full (input cycle only)
c) tAADSO specification must also be met (output cycle only)
d) The FIFO is not empty
Table 8.6 SCSI Asynchronous Timing
-REQ (OUT)
-ACK (OUT)
-SDP1-0
-SD15-0
1
3
2
4
5 6
-REQ (IN)
-ACK (IN)
-REQ (OUT)
-ACK (OUT)
-SDP1-0
-SD15-0
7
11 12
-REQ (IN)
-ACK (IN)
8
9 10
OUTPUT INPUT
Figure 8.1 SCSI Asynchronous Timing Diagrams