参数资料
型号: S5933QE
厂商: APPLIEDMICRO INC
元件分类: 总线控制器
英文描述: PCI BUS CONTROLLER, PQFP160
封装: PLASTIC, QFP-160
文件页数: 127/176页
文件大小: 823K
代理商: S5933QE
3-63
PCI BUS OPERATION REGISTERS
S5933
MASTER CONTROL/STATUS
REGISTER (MCSR)
Register Name:
Master Control/Status
PCI Address Offset: 3Ch
Power-up value:
000000E6h
Attribute:
Read/Write, Read Only,
Write Only
Size:
32 bits
This register provides for overall control of this de-
vice. It is used to enable bus mastering for both data
directions as well as providing a method to perform
software resets.
The following PCI bus controls are available:
Write Priority over Read
Read Priority over Write
Write Transfer Enable
Write master requests on 4 or more FIFO words
available (full)
Read transfer enable
Read master requests on 4 or more FIFO
available (empty)
Assert reset to Add-On
Reset Add-On to PCI FIFO flags
Reset PCI to Add-On FIFO flags
Reset mailbox empty full status flags
Write external non-volatile memory
The following PCI interface status flags are provided:
PCI to Add-On FIFO FULL
PCI to Add-On FIFO has four or more empty
locations
PCI to Add-On FIFO EMPTY
Add-On to PCI FIFO FULL
Add-On to PCI FIFO has four or more words
loaded
Add-On to PCI FIFO EMPTY
PCI to Add-On Transfer Count = Zero
Add-On to PCI Transfer Count = Zero
Figure 8. Bus Master Control/Status Register
31
29
27
24 23
0
14
12
10
8 7
6 5
15
Bit
Value
FIFO STATUS (RO)
D5=Add-on to PCI FIFO Empty
D4=Add-on to PCI FIFO 4+ Words
D3=Add-on to PCI FIFO Full
D2=PCI to Add-on FIFO Empty
D1=PCI to Add-on FIFO 4+Spaces
D0=PCI to Add-on FIFO Full
D7=Add-on to PCI Transfer Count
equals zero (R0)
D6=PCI to Add-on Transfer Count
equals zero (R0)
16
0
Write Transfer Control (R/W)
(PCI memory writes)
D10=Write Transfer Enable
D9=FIFO Management Scheme
D8=Write vs Read Priority
Reset Controls (R/WC)
D27=Mailbox Flags Reset
D26=Add-on to PCI FIFO
Status Flags Reset
D25=PCI to Add-on FIFO
Status Flags Reset
D24=Add-On Reset
nv operation
address/data
Memory Read Multiple
Enable = 1
Disable = 0
Read Transfer Control (R/W)
(PCI memory reads)
D14=Read Transfer Enable
D13=FIFO Management Scheme
D12=Read vs. Write Priority
nvRAM Access Ctrl
0
Control
Status
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