Cirrus Logic CS61583 - Manual (Page 21)

TCK
TMS
Controller state
TDI
IR shift-register
Parallel output of IR
Parallel Input to TDR
TDR shift-register
Parallel output of TDR
Register selected
TDO enable
TDO
Act
IDCODE New Instruction
Old data
Instruction register
Inactive Active Inactive Inactive
= Don't care or undefined
Parallel Input to IR
T
est-
L
o
g
ic
-R
eset
R
un-T
est/
Id
le
S
e
lect
-DR-S
can
S
e
le
ct-I
R-Sc
an
Cap
ture-I
R
P
o
u
se-I
R
Ex
it
2-
IR
S
h
if
t-
IR
Ex
it
1-
IR
Upd
a
te
-I
R
R
un-T
est/
Id
le
Ex
it
1-
IR
S
h
if
t-
IR
Figure 13. JTAG Instruction Register Update
CS61583
DS172PP5 21