mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1118

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

21.1 THE TAP CONTROLLER
The TAP controller is responsible for interpreting the sequence of logical values on the TMS
signal. It is a synchronous state machine that controls the operation of the JTAG logic. The
value shown adjacent to each bubble in the figure below represents the value of the TMS
signal sampled on the rising edge of the TCK signal.
1
0
RUN—TEST/IDLE
TEST LOGIC
RESET
0
Figure 21-2. TAP Controller State Machine
Freescale Semiconductor, Inc.
For More Information On This Product,
1
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
1
SELECT—DR_SCAN
CAPTURE—DR
UPDATE—DR
PAUSE—DR
SHIFT—DR
EXIT1—DR
EXIT2—DR
0
0
1
0
1
1
0
1
1
SELECT—IR_SCAN
IEEE 1149.1 Test Access Port
CAPTURE—IR
UPDATE—IR
PAUSE—IR
SHIFT—IR
EXIT1—IR
EXIT2—IR
0
0
1
0
1
1
0
1
21-3