Chapter 7 Transmission; Is It Possible For The Transmit Fifo To Overflow And For Cells To Be Discarded; Is There A Limit To The Size Of The Transmit Queue Of Each Vc Configured With A Transmit Packet Descriptor; How Is Transmission Performed If Size = 0 Is Set For An Aal-5 Transmit Packet Descriptor - NEC mPD98409 Q&A

Q.7.1

Is it possible for the transmit FIFO to overflow and for cells to be discarded?

A.7.1
No. If the transmit FIFO has become full because the UTOPIA interface cannot transmit any more cells, cell data
is not read. When the transmit FIFO has a vacancy, reading data is resumed.
Reference: µ PD98409 User's Manual 5.4.5 Transmit operation
Q.7.2

Is there a limit to the size of the transmit queue of each VC configured with a transmit packet descriptor?

A.7.2
No.
Reference: µ PD98409 User's Manual 5.4.2 Structure of transmit data
Q.7.3

How is transmission performed if SIZE = 0 is set for an AAL-5 transmit packet descriptor?

A.7.3
Transmission is performed normally. Only one last cell of padding + trailer is transmitted.
Reference: µ PD98409 User's Manual 5.4.2 Structure of transmit data

CHAPTER 7 TRANSMISSION

Information S14769EJ1V0IF00
23