TSB12LV41 Datasheet, PDF (67/195 Pages) Texas Instruments – IEEE 1394-1995 Link-Layer Controller for Consumer Applications

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
10
phy_ID
1 L n rsv pa pb pc pd pe pf pg ph r m
Logical inverse of first quadlet
PACKET # n† pa pb pc pd pe pf pg ph
1
0 p3 p4 p5 p6 p7 p8 p9 p10
2
1 p11 p12 p13 p14 p15 p16 p17 p18
3
2 p19 p20 p21 p22 p23 p24 p25 p26
† _{For n = 3 – 7, fields pa through ph are reserved.}
Figure 3–35. Phy Self-ID Packet #1, Packet #2, and Packet #3 Format
Table 3–18. Phy Self-ID Functions
FIELD NAME
DESCRIPTION
10
The 10 field is the Self-ID packet identifier.
c
When c is set and the link-active flag is set, this field indicates that the current node is a contender
for the bus or isochronous resource manager.
del
The del field contains the worst-case repeater-data delay time. The code is:
00 ≤ 144 ns ≈ (14 / Base_Rate)
01 – 11 Reserved
gap_cnt
The gap_cnt field contains the current value for the current node PHY_CONFIGURATION.gap_count
field.
i
When set, the i field indicates that the current node initiated the current bus reset (i.e., it started
sending a bus reset signal before it received one†).If this function is not implemented, i is returned
as 0.
L
When L is set, the current node has an active LLC and transaction layer.
m
When set, the m field indicates that another Self-ID packet for the current node immediately
follows (i.e. when m is set and the next Self-ID packet received has a different phy_ID, then a
Self-ID packet was lost).
† _{There is no way to ensure that exactly one node has this bit set. More than one node can be requesting a bus reset at}
the same time.
3–43