Cirrus Logic CS61584A - Manual (Page 38)

CS61584A
38 DS261PP5
DS261PP5
TCK
TMS
Controller state
TDI
Parallel Input to IR
IR shift-register
Parallel output of IR
Parallel Input to TDR
TDR shift-register
Register Selected
TDO enable
TDO
= Don’t care or undefined
Parallel output of TDR
Test
-L
o
g
ic-R
es
et
Run
-T
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s
t/
Id
le
Select-
D
R-
Sca
n
Sel
e
c
t-
D
R
-Scan
C
ap
tur
e-
D
R
P
aus
e-D
R
Ex
it
2
-D
R
Sh
if
t-
D
R
Updat
e-D
R
R
un-Test
/I
dl
e
Ex
it
1-
D
R
Sh
if
t-
D
R
Exi
t1
-DR
Sel
ect
-I
R
-Scan
IDCODE Instruction
Old data
Test data register
New data
Inactive Active Inactive Inactive Active
Figure 26. JTAG Data Register update
CS61584A
38 DS261F1