CHAPTER 3 FUNCTIONAL OUTLINE
PRELIMINARY
NEC confidential and Proprietary
70
(h) Packet Inserting SONET Payload on HALT mode
The
µ
PD98413 supports the HALT mode, which enables to transmit the fragmentary packet.
The data “7Dh-xxh” is terminal flag for the partial packet. If this flag is asserted, the packet insert is paused. And
insert data “7Eh” continually. Then if the
µ
PD98413 can be mapping the POS data for SONET payload, that data
is insert as the next partial packet. In default, this mode is disabled. It is enabled by the HALTM bit of the
MOPOST register.
Figure
3-24 Packet insert on HALT mode ( Transmit )
Address
Control
Partial packet
7Eh
FCS
7Dh-xxh
7Eh
7Eh
Partial packet
7Eh
7Eh
partial packet
7Dh-xxh
Flag sequence
Address
Control
Partial packet
FCS
Inserting Packet
Flag sequence
Flag sequence
Flag sequence
Terminal of Partial paket
Terminal of Partial paket
Partial packet
Partial packet
Flag sequence
Name Value
Flag sequence
7Eh
Terminal of Partial paket
7Dh-xxh
(xx is the value, which set by the STPN[7:0] bits of the HPTNT register.)
Содержание NEASCOT-P65
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