Maxim Integrated MAXQ7667 - Manual (Page 197)

__________________________________________________________________________________________________________ 11-8
MAXQ7667 User’s Guide
11.4.6 TAP Communication Examples—IR-Scans and DR-Scans
Figures 11-3 and 11-4 illustrate examples of communication between the host JTAG controller and the TAP of the MAXQ7667. The host
controls the TCK and TMS signals to move through the desired TAP states while accessing the selected shift register through the TDI
input and TDO output pair.
Figure 11-3. TAP Controller Debug Mode—IR-Scan Example
NEW INSTRUCTION
INSTRUCTION REGISTER
TCK
TMS
TDI
TDO
CONTROL
STATE
IR SHIFT
REGISTER
IR PARALLEL
OUTPUT
REGISTER
SELECTED
TDO
ENABLE
BYPASS
DON'T CARE OR UNDEFINED DON'T CARE OR UNDEFINED
DON'T CARE OR UNDEFINED DON'T CARE OR UNDEFINED
T
E
S
T
-L
O
G
IC
-R
E
S
E
T
R
U
N
-T
E
S
T
/ID
L
E
S
E
L
E
C
T
-D
R
-S
C
A
N
S
E
L
E
C
T
-I
R
-S
C
A
N
C
A
P
T
U
R
E
-I
R
S
H
IF
T
-I
R
S
H
IF
T
-I
R
E
X
IT
1
-I
R
E
X
IT
1
-I
R
U
P
D
A
T
E
-I
R
R
U
N
-T
E
S
T
/ID
L
E
E
X
IT
2
-I
R
P
A
U
S
E
-I
R