参数资料
型号: IBM21P100BGB
元件分类: 总线控制器
英文描述: PCI BUS CONTROLLER, PBGA304
封装: 31 X 31 MM, HEAT SINK, PLASTIC, BGA-304
文件页数: 123/140页
文件大小: 2032K
代理商: IBM21P100BGB
IBM21P100BGB
IBM 133 PCI-X Bridge R1.1
ppb11_pcix_regs.fm.03
July 9, 2001
Configuration Registers
Page 75 of 131
5.2.5.19 PCI-X Secondary Status Register
The PCI-X Secondary Status register reports status information about the secondary interface.
Address Offset
x‘82’
Access
See individual bit descriptions. Reads to this register behave normally. Writes are
slightly different in that bits can be reset, but not set. A bit is reset whenever the
register is written, and the data in the corresponding bit location is a ‘1’.
Reset Value
x‘0003’
Re
s
e
rv
ed
S
e
condar
y
Cloc
k
F
requ
ency
S
p
lit
R
equest
D
elaye
d
S
p
lit
C
omplet
io
n
O
verr
un
Un
ex
pec
ted
S
plit
Completi
on
S
p
lit
C
omplet
io
n
Disc
a
rded
133
M
H
z
C
apable
64-
bi
t
D
evice
15 14 13 12 11 10
9
876543210
Bit(s)
Access
Field Name and Description
15:9
RO
Reserved.
8:6
RO
Secondary Clock Frequency
This register enables configuration software to determine to what mode and (in PCI-X mode) what frequency
the bridge set the secondary bus the last time secondary RST# was asserted. This is the same information
the bridge used to create the PCI-X initialization pattern on the secondary bus the last time secondary RST#
was asserted.
Value
Max Clock Frequency (MHz) Minimum Clock Period (ns)
000
conventional mode
N/A
001
66
15
010
100
10
011
133
7.5
100
reserved reserved
101
reserved reserved
110
reserved reserved
111
reserved reserved
5RW
Split Request Delayed
This bit is set any time the bridge has a request to forward a transaction to the secondary bus, but cannot
because there is not enough room within the limit specified in the Split Transaction Commitment Limit field in
the Downstream Split Transaction Control register. It is used by algorithms that optimize the setting of the
downstream Split Transaction Commitment Limit register.
0
bridge has not delayed a Split Request.
1
bridge has delayed a Split Request.
相关PDF资料
PDF描述
IBM21P100BGC PCI BUS CONTROLLER, PBGA304
IBM25403GCX-3JC76C2 RISC PROCESSOR, PQFP16
IBM25405GP-3BA200C2 RISC PROCESSOR, PBGA456
IBM25EMPPC603EFG-100 32-BIT, 100 MHz, RISC PROCESSOR, PQFP240
IBM25EMPPC603EBG-100 32-BIT, 100 MHz, RISC PROCESSOR, CBGA255
相关代理商/技术参数
参数描述
IBM24L5086 制造商:AVED MEMORY PRODUCTS 功能描述: 制造商:AVED Memory Products 功能描述:
IBM25403GCX-3BC80C2 制造商:IBM 功能描述:RISC PROCESSOR, 160 Pin Plastic BGA
IBM25403GCX-3JC50C2 制造商:IBM 功能描述:403GCX-3JC50C2
IBM25403GCX-3JC66C2 制造商:IBM 功能描述:
IBM25403GCX3JC76C2 制造商:IBM 功能描述: