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: 113/176页
文件大小: 823K
代理商: S5933QE
3-49
PCI CONFIGURATION REGISTERS
S5933
MAXIMUM LATENCY REGISTER (MAXLAT)
Register Name:
Maximum Latency
Address Offset:
3Fh
Power-up value:
00h
Boot-load:
External nvRAM offset
7Fh
Attribute:
Read Only
Size:
8 bits
This register may be optionally used by bus masters
to specify how often this device needs PCI bus ac-
cess. A value of zero indicates that the bus master
has no stringent requirement. The units defined by
the least significant bit are in 250-ns increments. This
register is treated as “information only” and has no
further implementation within this device.
Values other than zero are possible when an external
boot memory is used.
Figure 16. Maximum Latency Register
7
0
Value x 250ns (RO)
00-no requirement
01-FFh
1
2
3
4
5
6
0
bit
value
00
0
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