HIPPI
S2020/S2021 SOURCE DEVICE STATE MACHINES
Figure 4. S2020 Data/FIFO Interface SM State Transition Diagram (continued)
3, 4, 5, 6, 7, 8, 9, or 11
go to 0 on "DSCN" + "RST"
FROM 4
TO 3
or go to 10 on "CNRQ"
"CON"•"NPIF"
"CON"•"NPIF"
"CON"•"NPIF"
{PENDBST}
"CON" •
{WTBST}
11001
{SRCERR}
5
9
"FLOF"
"CON"•"FLOF"
•"NPIF"
11
01001
00000
"CON"•"PKT"•"NODT"•"FLOF"
"CON"
"CON"•"PKT"•"256W"•"NODT"
{BURST}
11111
"CON"•"FLOF" •
("SBST"+"PKT"•"NODT")
6
"CON"• ("PKT" + "256W" + "NODT")
{LSTWD}
01111
7
TO 3
"CON"•"NPIF"
"CON"
"CON"•"NPIF"•"DRDY"
{LLRC}
01001
8
{STATE}
STATE #
X X X X X
"CON"•"NPIF"•"DRDY"
HIPPI REQ
LLRC ENAB.
HIPPI BURST
HIPPI PACKET
FIFO READ = (NREN)
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