免费看三级片永久网站,亚洲AV无码AV吞精久久,国产日韩欧美在线

您好，
買(mǎi)賣IC網(wǎng)歡迎您。
請(qǐng)登錄
免費(fèi)注冊(cè)

您現(xiàn)在的位置：買(mǎi)賣IC網(wǎng) > PDF目錄36343 > 935279245557 (NXP SEMICONDUCTORS) SPECIALTY CONSUMER CIRCUIT, PBGA456 PDF資料下載

型號(hào)：	935279245557
廠商：	NXP SEMICONDUCTORS
元件分類：	消費(fèi)家電
英文描述：	SPECIALTY CONSUMER CIRCUIT, PBGA456
封裝：	27 X 27 MM, 1.75 MM HIEGHT, PLASTIC, MS-034, BGA-456
文件頁(yè)數(shù)：	669/828頁(yè)
文件大?。?/td>	7748K
代理商：	935279245557

Philips Semiconductors

PNX15xx Series

Volume 1 of 1

Chapter 23: LAN100 — Ethernet Media Access Controller

PNX15XX_SER_3

Product data sheet

Rev. 3 — 17 March 2006

For each of the two transmit channels, the transmit descriptors are stored in an array

in memory. The base address of the non-real-time transmit descriptor array is stored

in the TxDescriptor register. Likewise for real-time transmissions, the descriptor array

base address is stored in the TxRtDescriptor register. The number of descriptors in

the array is stored in the Tx(Rt)DescriptorNumber register using minus-one encoding,

for example, if the array has 8 elements the register value should be 7.

Parallel to the descriptors, there is an array for status. For each element of the

descriptor array, there is an associated status eld in the status array. The base

address of the status array is stored in the Tx(Rt)Status register. During operation,

that is, when the Transmit Datapath is enabled, the Tx(Rt)Descriptor, Tx(Rt)Status

and Tx(Rt)DescriptorNumber registers should not be modied. The base address of

the descriptor array, as stored in the Tx(Rt)Descriptor register, must be aligned on a

16-byte address boundary. The status array base address, as stored in the

Tx(Rt)Status register, must be aligned on an 8-byte address boundary.

The TxConsumeIndex and TxProduceIndex registers are counters that start at 0 and

wrap back to 0 when they equal TxDescriptorNumber, which indicates the number of

descriptors that have been processed in the non-real-time transmit channel. The

TxRtConsumeIndex and TxRtProduceIndex perform the same function for the

real-time channel. The Tx(Rt)ProduceIndex contains the index of the next descriptor

that is going to be lled by the software driver. The Tx(Rt)ConsumeIndex contains the

index of the next descriptor that is going to be transmitted by the hardware. If

Tx(Rt)ProduceIndex == Tx(Rt)ConsumeIndex, then the transmit buffer is empty. If

Tx(Rt)ProduceIndex == Tx(Rt)ConsumeIndex – 1, then the transmit buffer is full, and

the software driver cannot add new descriptors unless the hardware has transmitted

some packets and freed up some descriptors.

As shown in Table 8, each Transmit Descriptor Structure takes four word locations (16

bytes) of memory. Likewise each Transmit Status Structure takes two words (8 bytes)

in memory. Each Transmit Descriptor Structure consists of a Packet word that points

to the data buffer containing transmit data, a Control word and a TimeStamp word

used for real-time transmission. For non-real-time transmission, the TimeStamp word

is ignored. The Pad word is always ignored and is just used to align the descriptors on

a 16-byte boundary. The Packet eld has a zero address offset, the control eld has a

4-byte address offset, the time-stamp eld has an 8 byte offset with respect to the

descriptor address.

Table 8: Transmit Descriptor Fields

Function

31:0 Base address of the data buffer containing transmit data.

31:0 Control information, see Table 9.

31:0 Time stamp for real-time transmission. This time stamp

indicates the moment when this packet is to be transmitted.

31:0 Unused word to pad to 8 byte boundary.

相關(guān)PDF資料	PDF描述
935274728557	SPECIALTY CONSUMER CIRCUIT, PBGA456
935277747557	SPECIALTY CONSUMER CIRCUIT, PBGA456
935272905557	SPECIALTY CONSUMER CIRCUIT, PBGA456
935274744557	SPECIALTY CONSUMER CIRCUIT, PBGA456
935277746557	SPECIALTY CONSUMER CIRCUIT, PBGA456

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
935280517132	制造商:NXP Semiconductors 功能描述:IC TRANSLATING BUFFER 6XSON
935281751112	制造商:NXP Semiconductors 功能描述:IC BUFFER/DVR 16BIT 3ST 48TSSOP
935281751118	制造商:NXP Semiconductors 功能描述:IC BUFFER/DVR 16BIT 3ST 48TSSOP
935281753112	制造商:NXP Semiconductors 功能描述:IC TXRX 16BIT 3.3V 3ST 48TSSOP
935281753118	制造商:NXP Semiconductors 功能描述:IC TXRX 16BIT 3.3V 3ST 48TSSOP

發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

*型號(hào)	*數(shù)量	廠商	批號(hào)	封裝

采購(gòu)需求

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

我的聯(lián)系方式

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)