Datasheet

1.7 Extended Link Service
C141-C008 1-39
(1) R_CTL.. (Routing Control)
The high order four bits (2h) represent Extended Link Service, and the low
order four bits each Extended Link Service.
(2) D_ID.. (Destination Identifier)
− Destination address for the frame.
(3) S_ID.. (Source Identifier)
− Source address for the frame.
(4) Type
The Extended Link Service uses 01h.
(5) F_CTL.. (Frame Control)
− Set 290000h for the Extended Link Service Command.
(Originator of Exchange, First Sequence of Exchange, Last Data Frame
of Sequence, Transfer Sequence Initiative)
− Set 980000h for a response to the Extended Link Service Command.
(Responder of Exchange, Last Sequence of Exchange)
(6) SEQ_ID.. (Sequence Identifier)
− The drive does not check this item.
− The drive responds with FFh.
(7) DF_CTL.. (Data Field Control)
Set 00h because no optional header is used.
(8) SEQ_CNT.. (Sequence Count)
− The drive does not check this item.
− The drive responds with 0000h.
(9) OX_ID.. (Originator Exchange Identifier)
− The drive responds with OX_ID received from the initiator.
(10) RX_ID.. (Responder Identifier)
Set FFFFh to indicate that RX_ID is unused.
(11) Parameter
Unused in the Extended Link Service.