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型號(hào)：	μPD98501
廠商：	NEC Corp.
英文描述：	Network Controller(網(wǎng)絡(luò)控制器)
中文描述：	網(wǎng)絡(luò)控制器（網(wǎng)絡(luò)控制器）
文件頁(yè)數(shù)：	359/671頁(yè)
文件大小：	2229K
代理商：	ΜPD98501

CHAPTER 5 ETHERNET CONTROLLER

Preliminary User’s Manual S14767EJ1V0UM00

5.2.5.4 En_TXSR-Transmit Status Register (20CH R)

Carrier lost was detected during the transmission

Back pressure occurred when the packet was received

A packet request during the PAUSE operation was transmitted

A PAUSE control frame was transmitted

A control frame was transmitted

The TPUR pin was set high and aborted.

A packet greater than the value of the En_LMAX register in length was transmitted and

Collision occurred out of the collision window and the transmission was aborted.

The number of collisions was greater than the value of the En_RETX register and the

transmission was aborted.

The transmission was deferred beyond 24888 bits time and aborted.

Transmission deferral occurred at least one time but less than an excessive deferral.

A broadcast packet was transmitted.

A multicast packet was transmitted.

The transmission was completed.

The value of the length field in the transmitted packet was over 1518 bytes.

The value of the length field in the transmitted packet didn’t match the actual data byte

The attached CRC in the data byte stream didn’t match the internal generated CRC when

the En_MACC1 register: CRCEN bit was cleared to 0.

The number of collisions for the previous transmission only.

The number of the transmitted bytes not including collided bytes.

This status is not reported if the packet requested during the PAUSE operation was a control frame

requested by TPCF pin.

This status is reported only when no collision events occurred.

This status is reported only when the En_MACC1 register: HUGEN bit is cleared.

This status is not reported if En_MACC1 register: FLCHT bit is cleared.

When the value of the length field was over 1518 bytes, it is reported only as TFLOR status, not as

TFLER status.

When the transmission was aborted, this value is not correct.

5.2.5.5 En_TXDPR-Transmit Descriptor Pointer(214H R/W)

Transmit Descriptor

Please see the Section 5.3.2.1.

Reserved for future use. Write as 0

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