- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360706 > IBM32NPR101EPXCAC133 Microprocessor PDF資料下載
參數(shù)資料
| 型號(hào)： | IBM32NPR101EPXCAC133 |
| 英文描述： | Microprocessor |
| 中文描述： | 微處理器 |
| 文件頁(yè)數(shù)： | 33/131頁(yè) |
| 文件大?。?/td> | 1679K |
| 代理商： | IBM32NPR101EPXCAC133 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)當(dāng)前第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)
PRS28.4G
IBM Packet Routing Switch
prs28.03.fm
August 31, 2000
Functional Description
Page 33 of 131
H2 is set to 0x‘FF' for internal speed expansion.
When the Flow Control Enable bit of Configuration Register 0 is not set, bytes H1 and H2 are identical to
bytes H1 and H2 of the received header.
3.2.3 Idle Packet Trailer Byte T
The Trailer Byte is only defined for Idle Packets. For the other packet types, the Trailer Byte contains user
data. The Trailer Byte contains an eight-bit CRC checksum value. The trailer CRC of a byte stream is calcu-
lated over all the bytes sent over that stream since the last Idle Packet CRC byte.
The CRC encoding is defined by the generating polynomial X8+X4+X3+X2+1. The initial value for CRC
calculation is programmable via an 8-bit CRC Init field in Configuration Register 1. The initial CRC value is
chosen so that the resulting trailer CRC of a Sync packet equals 0x’33’ for all LU lengths. The CRC Init values
are given in the chapter describing Configuration Register 1.
When an Idle Packet is received, the CRC is verified. In case of an error, it is reported via an interrupt, when
not masked.
3.3 Packet Reception
3.3.1 Master Input Port Operation
Packets are received on an input asynchronously with the packets on the other inputs. When a start of packet
is expected, a master input port performs the following actions:
The packet header is analyzed and the various fields are extracted from the header. The entire packet is
ignored if the header parity is incorrect. The error is reported via CRC Error interrupt and, if not masked,
the main interrupt is asserted. Also, the global CRC Error counter is incremented.
If the header parity is correct and the received packet is not a sync packet, the packet color is extracted.
When the packet type is yellow (which is only possible for Idle Packets), bit n in the Yellow Register is set
(where n is the number of the input port).
Further actions depend on the packet type and are described in the following sections.
3.3.1.1 Idle Packet
In external speed expansion, the slave is informed that an Idle Packet has arrived. The Trailer Byte is verified.
If there is a CRC error, it is reported via the CRC Error interrupt and, if not masked, the main interrupt is
asserted. The global CRC Error counter is also incremented. No further action is taken for Idle Packets (not
stored in shared memory).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IBM37RGB524CF17A | Video DAC with Color Palette (RAMDAC) |
| IBM37RGB524CF22A | Video DAC with Color Palette (RAMDAC) |
| IBM39MPEGS420PBA18C | |
| IBM39MPEGS422PBA17C | |
| IBM39MPEGSIPBA18C | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IBM35CPC945C03C-2 | 制造商:IBM 功能描述: |
| IBM37RGB524CF17A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| IBM37RGB524CF22A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| IBM39ENV422DLL00C | 制造商:IBM 功能描述: |
| IBM39ENV422PBA17C | 制造商:IBM Microelectronics 功能描述:VID ENCODER 420PIN HPBGA - Trays 制造商:IBM 功能描述:IBM IBM39ENV422PBA17C Encoders - Decoders |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。