YMF754 Datasheet, PDF (9/60 Pages) YAMAHA CORPORATION – DS-1E

YMF754
FUNCTION OVERVIEW
1. PCI INTERFACE
DS-1E supports the PCI bus interface and complies to PCI revision 2.2.
1-1. PCI Bus Command
DS-1E supports the following PCI Bus commands.
1-1-1. Target Device Mode
C/BE[3:0]#
Command
0 0 0 0 Interrupt Acknowledge (not support)
0 0 0 1 Special Cycle (not support)
0 0 1 0 I/O Read
0 0 1 1 I/O Write
0 1 0 0 reserved
0 1 0 1 reserved
0 1 1 0 Memory Read
0 1 1 1 Memory Write
1 0 0 0 reserved
1 0 0 1 reserved
1 0 1 0 Configuration Read
1 0 1 1 Configuration Write
1 1 0 0 Memory Read Multiple (alias to memory read)
1 1 0 1 Dual Address Cycle (not support)
1 1 1 0 Memory Read Line (alias to memory read)
1 1 1 1 Memory Write and Invalidate (alias to memory write)
DS-1E does not assert DEVSEL# when accessed with commands that are indicated as (not supported) or
reserved.
1-1-2. Master Device Mode
C/BE[3:0]#
0110
0111
Command
Memory Read
Memory Write
When DS-1E becomes a Master Device, it generates only memory write and read cycle commands.
June 28, 1999
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