参数资料
型号: YMF754-V
元件分类: 微控制器/微处理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PQFP128
封装: 0.50 MM PITCH, LQFP-128
文件页数: 60/60页
文件大小: 309K
代理商: YMF754-V
YMF754
December 25, 1999
-9-
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
0000
Interrupt Acknowledge (not support)
0001
Special Cycle (not support)
0010
I/O Read
0011
I/O Write
0100
reserved
0101
reserved
0110
Memory Read
0111
Memory Write
1000
reserved
1001
reserved
1010
Configuration Read
1011
Configuration Write
1100
Memory Read Multiple (alias to memory read)
1101
Dual Address Cycle (not support)
1110
Memory Read Line (alias to memory read)
1111
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]#
Command
0110
Memory Read
0111
Memory Write
When DS-1E becomes a Master Device, it generates only memory write and read cycle commands.
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