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: 141/176页
文件大小: 823K
代理商: S5933QE
3-77
ADD-ON BUS OPERATION REGISTERS
S5933
31
29 28 27 25 24 23
0
12 11
6
75
Bit
Value
FIFO STATUS (RO)
D5=PCI to Add-on FIFO Empty
D4=PCI to Add-on 4+ Spaces
D3=PCI to Add-on FIFO Full
D2=Add-on to PCI FIFO Empty
D1=Add-on to PCI FIFO 4+ Words
D0=Add-on to PCI FIFO Full
16 15
0
BIST Condition Code (R/W)
Reset Controls
D27=Mailbox Flags
D26=PCI to Add-on FIFO
Status Flags
D25=Add-on to PCI FIFO
Status Flags
nv operation
address/data
nvRAM Access Ctrl
Transfer Count
Enable
D6=Read Transfer Count
Equals Zero (RO)
D7=Write Transfer Count
Equals Zero (RO)
ADD-ON GENERAL CONTROL/STATUS
REGISTER (AGCSTS)
Register Name:
Add-On General Control and
Status
Add-On Address Offset: 3Ch
Power-up value:
000000F4h
(PCI initiated bus mastering)
00000034h
(Add-On initiated bus mastering)
Attribute:
Read/Write, Read Only, Write
Only
Size:
32 bits
This register provides for overall control of the Add-
On portion of this device. It is used to provide a
method to perform software resets of the mailbox and
FIFO flags.
The following Add-On controls are provided:
Reset PCI to Add-On FIFO flags
Reset Add-On to PCI FIFO flags
Reset mailbox empty full status flags
Write/read external non-volatile memory.
The following status flags are provided to the
Add-On:
Add-On to PCI FIFO FULL
Add-On to PCI FIFO has four or more empty
locations
Add-On to PCI FIFO EMPTY
PCI to Add-On FIFO FULL
PCI to Add-On FIFO has four or more words
loaded
PCI to Add-On FIFO EMPTY
Figure 5. Add-On General Control/Status Register
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