Is There A Limit To The Number Of Batches In The Receive Pool; Is It Possible To Temporarily Stop Reception For Each Vc; Are There Cases In Which A Receive Batch Is Consumed Even If A Receive Indication That Includes Error Information Has Been Reported; Is Only The User Data Of Aal-5 Cpcs-Pdu Stored In The Receive Buffer When An Aal-5 Packet Is Received - NEC mPD98409 Q&A

Q.8.3

Is there a limit to the number of batches in the receive pool?

A.8.3
Yes. Up to 64K, equal to the number of bits in the Remaining number of batches field of a receive pool descriptor.
Reference: µ PD98409 User's Manual 5.5.2 Structure of receive data
Q.8.4

Is it possible to temporarily stop reception for each VC?

A.8.4
Yes. To stop reception, clear the entry and enable bits of the receive look-up table for each VC. To resume
reception, set the entry and enable bits again.
Reference: µ PD98409 User's Manual 5.5.4 Setting of receive look-up table
Q.8.5
Are there cases in which a receive batch is consumed even if a receive indication that includes error information
has been reported?
A.8.5
Yes. The batches consumed until the error occurs can be recognized from the Packet size and Packet start
address fields in the receive indication. If a receive FIFO overrun error occurs while the first cell of a packet is
being received, all the cells of that packet are internally discarded and no receive batch is consumed at this time.
This is reported as Packet size = 0.
Reference: µ PD98409 User's Manual 5.5.5 (4) AAL-5 packet reception error detection
Q.8.6

Is only the user data of AAL-5 CPCS-PDU stored in the receive buffer when an AAL-5 packet is received?

A.8.6
The entire AAL-5 CPCS-PDU including the user data, padding, and trailer is stored in the receive buffer.
Reference: µ PD98409 User's Manual 3.2 AAL-5 SAR Sublayer Function
CHAPTER 8 RECEPTION
Information S14769EJ1V0IF00
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