SCSI Registers
4-53
Register Three (BAR3) (SCRIPTS RAM)
and
Address Register Four (BAR4) (SCRIPTS RAM)
. This is
the base address for the 8 Kbytes of internal RAM.
Memory Move Read Selector (MMRS)
contains
bits [63:32] and
contains bits [31:0] of the memory mapped operating
register base address. Bits [23:16] of
contain the PCI
register
value and bits [15:0] contain the PCI
register
value. When this bit is set, only reads to the registers are
affected, writes occur normally.
When this bit is cleared, the SCRATCH A, MMRS,
SCRATCH B, MMWS, and SFS registers return to normal
operation.
Note:
Bit 3 is the only writable bit in this register. All other bits are
read only. When modifying this register, all other bits must
be written to zero. Do not execute a Read-Modify-Write to
this register.
R
Reserved
[2:0]
Register: 0x1B
Chip Test Three (CTEST3)
Read/Write
R
Reserved
[7:4]
FLF
Flush DMA FIFO
3
When this bit is set, data residing in the DMA FIFO is
transferred to memory, starting at the address in the
register. This bit is not
self-clearing; clear it once the data is successfully
transferred by the LSI53C1000.
Note:
Polling of FIFO flags is allowed during flush operations.
7
4
3
2
1
0
R
FLF
CLF
R
WRIE
0
0
0
0
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...