NEC UPD98413 User Manual page 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.
Flag sequence
7Eh
Name
Flag sequence
Terminal of Partial paket
70
CHAPTER 3 FUNCTIONAL OUTLINE
Figure 3-24
Packet insert on HALT mode ( Transmit )
Address Control Partial packet
Inserting Packet
Terminal of Partial paket
Address Control Partial packet
7Eh Partial packet 7Dh-xxh
Terminal of Partial paket
Flag sequence
Value
7Eh
7Dh-xxh
(xx is the value, which set by the STPN[7:0] bits of the HPTNT register.)
PRELIMINARY
Partial packet Partial packet
Flag sequence
7Dh-xxh 7Eh
7Eh partial packet
Flag sequence
NEC confidential and Proprietary
FCS
FCS 7Eh
Flag sequence