參數(shù)資料
型號: IBM3209K3114
廠商: IBM Microeletronics
英文描述: IBM Packet Routing Switch Serial Interface Converter(IBM封裝路線選擇開關(guān)串行接口轉(zhuǎn)換器)
中文描述: IBM的分組路由交換機(jī)串行接口轉(zhuǎn)換器(IBM的封裝路線選擇開關(guān)串行接口轉(zhuǎn)換器)
文件頁數(shù): 56/152頁
文件大小: 2390K
代理商: IBM3209K3114
IBM3209K3114
IBM Packet Routing Switch Serial Interface Converter
Advance
Converter Configuration Table Registers
Page 46 of 142
prssi.01
July 12, 2000
4.1.1.2 Setup 2_X Path Register
The settings of Set Up Register 2 depend on the packet size, the PE clock, the switch clock, and the flow
control mechanism in use.
Example 1: for a 64-bytes packet and a PE and switch using the same range clock frequency, the setting
might be:
Ingress buffer with out of band flow control (RXENB)
- Almost empty: x
10
for a 16 word-packet (packet of 64 bytes) or above to avoid underrun
- Almost full: x
2C
or below to avoid overrun
Egress buffer
- Almost empty: x
10
or above to avoid underrun
- Almost full: x
3D
or below to avoid overrun
Example 2: for an 80-bytes packet and a protocol engine and switch clock at 110 MHz, the setting might be:
Ingress buffer with out of band flow control (RXENB)
- Almost empty: x
14
for a 20 word-packet (packet of 80 bytes) or above to avoid underrun
- Almost full: x
28
or below to avoid overrun
Egress buffer
- Almost empty: x
14
or above to avoid underrun
- Almost full: x
30
or below to avoid overrun
U
XEgThFull
U
XEgThEmpt
U
XInThFull
U
XInThEmpt
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Reset Output Status
(Power-on-Reset, Software Reset Path X)
7807 3807
Address in Word Mode
x'04
Address in Byte Mode
x'04 to 07
Access Type
Read/Write
Bits /
Word
Bits /
Bytes
Name
Description
31
7
Unused
30-24
6-0
XEgThFull
Egress FIFO almost full threshold (word)
23
7
Unused
22-16
6-0
XEgThEmpt
Egress FIFO almost empty threshold (word)
15-14
7-6
Unused
13-8
5-0
XInThFull
Ingress FIFO almost full threshold (word)
7-6
7-6
Unused
5-0
5-0
XInThEmpt
Ingress FIFO almost empty threshold (word)
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