PI7C8150
双端口PCI至PCI桥接器
超前信息
目录
1
2
引言................................................................................................................................ 1
信号定义..................................................................................................................... 2
2.1
S
IGNAL
T
YPES
................................................................................................................................. 2
2.2
S
IGNALS
.......................................................................................................................................... 2
2.2.1
主总线接口信号
............................................................................ 2
2.2.3
时钟信号
................................................................................................................. 5
2.2.4
杂项信号的................................................ .............................................
5
2.2.5
通用I / O接口信号
.......................................................... 6
2.2.6
JTAG边界扫描信号
.................................................................................. 6
2.2.7
电源和GROUND.......................................................................................................
7
2.3
引脚列表 - 208 -PIN FQFP ............................................................................................................ 7
2.4
引脚列表 - 256引脚PBGA ....................................................................................................... 9
3
PCI总线操作..................................................................................................................... 10
3.1
类型TRANSACTIONS..................................................................................................... 10
3.2
单一地址相....................................................................................................... 11
3.3
设备选择( DEVSEL_L )的生成............................................ .......................... 11
3.4
数据阶段............................................................................................................................. 12
3.5
写事务.......................................................................................................... 12
3.5.1
存储器写事务............................................... .................................
12
3.5.2
存储器写和禁止
............................................................................ 13
3.5.3
延迟写入交易............................................... ................................
13
3.5.4
写事务地址边界.............................................. .........
14
3.5.5
BUFFERING多写事务.............................................. .......
15
3.5.6
快速返回到回交易
....................................................................... 15
3.6
读事务............................................................................................................ 15
3.6.1
预取读事务............................................... .....................
15
3.6.2
非预取读取事务............................................. .............
16
3.6.3
预读取地址边界
............................................................... 16
3.6.4
延迟读取请求
.......................................................................................... 17
3.6.5
,目标延迟读取完成
........................................................ 17
3.6.6
延迟读取完成引发剂BUS ............................................ ....
18
3.6.7
FAST BACK- TO- BACK读事务
............................................................. 19
3.7
配置交易................................................ ...................................... 19
3.7.1
类型0 ACCESS TO PI7C8150
......................................................................................... 19
3.7.2
键入1以0型转换
.................................................................................. 20
3.7.3
1型1型货运............................................ .....................................
21
3.7.4
特别CYCLES..............................................................................................................
22
3.8
交易终止................................................ ............................................. 23
3.8.1
MASTER终止INITIATED BY PI7C8150 ............................................. .......
24
3.8.2
MASTER中止收到PI7C8150 ............................................. ......................
24
3.8.3
目标终止收到PI7C8150
.................................................... 25
3.8.4
目标终止INITIATED BY PI7C8150
.................................................... 27
4
地址DECODING..................................................................................................................... 29
4.1
地址范围................................................................................................................... 29
4.2
I / O地址DECODING........................................................................................................ 29
4.2.1
I / O基址和限制地址寄存器.......................................... ......................
30
4.2.2
ISA MODE...........................................................................................................................
31
iv
2002年8月22日 - 修订版1.02