Cirrus Logic CS61583 - Manual (Page 22)

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
T
est
-Lo
g
ic
-Re
set
Run
-T
est
/I
dl
e
S
e
le
ct-
D
R
-Sc
an
S
e
le
ct-
D
R
-Sc
an
Cap
ture-D
R
P
ouse-
DR
Ex
it
2
-DR
Shi
ft
-D
R
Upd
a
te
-D
R
Run
-T
est
/I
dl
e
Ex
it
1
-DR
Shi
ft
-D
R
Ex
it
1
-DR
Se
le
ct
-I
R
-Sc
an
IDCODE Instruction
Old data
Test data register
New data
Inactive Active Inactive Inactive Active
Figure 14. JTAG Data Register Update
CS61583
22 DS172PP5