ProDAQ 3150 User Manual
3150UM-01
Bustec Production Ltd.
Page 49
IBUS cycles (FC-SHARC-DRAM)
Sharc External Address commands
A31
A30
A29
A28
A27
A26
A25
A24
MODE
Bit M2
MODE
Bit M1
MODE
Bit M0
depends
on MODE
depends
on MODE
depends
on MODE
depends
on MODE
depends
on MODE
M2
M1
M0
Selected Mode
0
0
0
reserved
0
0
1
MODE 1: SHARC single read or write Cycle from or to FC-card
0
1
0
reserved
0
1
1
MODE 3: SHARC single read or write Cycle from or to DRAM
1
0
0
reserved
1
0
1
reserved
1
1
0
reserved
1
1
1
reserved
MODE 1
(SHARC single read or write Cycle)
A31 A30 A29
A28
A27 A26
A25
A24
0
0
1
0
0
0
FC
RD
x
FC-card AS cycle (only write)
0
0
1
0
0
1
FC
RD
x
FC-card AS cycle and hold AS (only write)
0
0
1
0
1
0
x
x
FC-card AS disconnect cycle (clr AS)
0
0
1
0
1
1
x
x
Reserve
0
0
1
1
0
0
x
x
FC-card „normal“ Read/Write DS cycle
0
0
1
1
0
1
x
x
FC-card „pipe“ Read DS cycle
(read FC-Latch and then start DS cycle)
0
0
1
1
1
0
x
x
FC-card Read Latch cycle
(read FC-Latch)
- A23-A16 used as FC-card select lines
- write cycle to all FC-cards possible
D[15:0] assign to FCa, FCc
D[31:16] assign to FCb, FCd
- read cycle only from one or two FC-cards
FCa, FCc assign to D[15:0] ; use only one of the 4 FC-cards (FC1,2,5,6)
FCb, FCd assign to D[31:16] ; use only one of the 4 FC-cards (FC3,4,7,8)
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