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]#
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Command
Interrupt Acknowledge (not support)
Special Cycle (not support)
I/O Read
I/O Write
reserved
reserved
Memory Read
Memory Write
reserved
reserved
Configuration Read
Configuration Write
Memory Read Multiple (alias to memory read)
Dual Address Cycle (not support)
Memory Read Line (alias to memory read)
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]#
0
0
1
1
1
1
0
1
Command
Memory Read
Memory Write
When DS-1E becomes a Master Device, it generates only memory write and read cycle commands.
June 28, 1999
-9-
YAMAHA [ YAMAHA CORPORATION ]
