MB86606A Datasheet, PDF (31/64 Pages) Fujitsu Component Limited. – FAST-20 SCSI Protocol Controller

MB86606A
6. DMA Interface
DMA access timing
The time regulations are not applicable in the following cases:
• During SCSI input and when data buffer EMPTY, or when one byte held
• During SCSI output and when data buffer FULL, or when 511 bytes held
• When parity error detected (target)
• When error stopping transfer occurs in SCSI interface
(1) Access cycle time (burst mode)
Parameter
Address cycle time
Symbol
tDCY1
tDCY2
tDCY3
tDCY4
Value
Min.
Max.
2 tCLF
—
3 tCLF
—
4 tCLF
—
1 tCLF
—
Unit
ns
ns
ns
ns
IOWR/IORD
DMUDS/DMLDS
t DCY1
t DCY2
t DCY3
t DCY4
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