參數(shù)資料
型號: IBM32NPR100EXXCAB133
英文描述: Microprocessor
中文描述: 微處理器
文件頁數(shù): 64/131頁
文件大小: 1679K
代理商: IBM32NPR100EXXCAB133
PRS28.4G
IBM Packet Routing Switch
Internal Registers
Page 64 of 131
prs28.03.fm
August 31, 2000
5.2.8 Shared Memory Threshold Register 0
Shared Memory Threshold Register 0 provides the thresholds for priorities 0 and 1 in two 5-bit fields, and
Register 1 provides for priorities 2 and 3. These values have a range of 0 to 496, with steps of 16. When the
number of packets in shared memory becomes
the threshold value of a given priority, the corresponding
memory grant is low (`0'b). Otherwise, the memory grant bit is high (‘1'b).
Reserved
Priority 0
Shared Memory
Threshold
Reserved
Priority 1
Shared Memory
Threshold
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Reset Value
0
OCM Address
5
Access Type
Read/Write
Bits
Description
0 - 2
Reserved.
3 - 7
Shared Memory Threshold for priority 0
.
8 - 10
Reserved.
11 - 15
Shared Memory Threshold for priority 1
.
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