Maxim Integrated MAXQ7666 - Manual (Page 295)

MAXQ7665/MAXQ7666 User’s Guide
10-9
Figure 10-3. 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
TEST-LOGIC-RESET
RUN-TEST/IDLE SELECT-DR-SCAN SELECT-IR-SCAN
CAPTURE-IR
SHIFT-IR SHIFT-IR EXIT1-IR EXIT1-IR
UPDATE-IR RUN-TEST/IDLE
EXIT2-IR PAUSE-IR
10.4.5.1 TAP Communication Examples IR-Scans and DR-Scans
Figures 10-3 and 10-4 illustrate examples of communication between the host JTAG controller and the TAP of the MAXQ7665/
MAXQ7666. The host controls the TCK and TMS signals to move through the desired TAP states while accessing the selected shift reg-
ister through the TDI input and TDO output pair.
Maxim Integrated