Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet
Product codes
AT32UC3A3-XPLD
947
32072H–AVR32–10/2012
AT32UC3A3
35.5.2.4
INTEST
This instruction selects the boundary-scan chain as Data Register for testing internal logic in the
device. The logic inputs are determined by the boundary-scan chain, and the logic outputs are
captured by the boundary-scan chain. The device output pins are driven from the boundary-scan
chain.
device. The logic inputs are determined by the boundary-scan chain, and the logic outputs are
captured by the boundary-scan chain. The device output pins are driven from the boundary-scan
chain.
Starting in Run-Test/Idle, the INTEST instruction is accessed the following way:
1.
Select the IR Scan path.
2.
In Capture-IR: The IR output value is latched into the shift register.
3.
In Shift-IR: The instruction register is shifted by the TCK input.
4.
In Update-IR: The data from the boundary-scan chain is applied to the internal logic
inputs.
inputs.
5.
Return to Run-Test/Idle.
6.
Select the DR Scan path.
7.
In Capture-DR: The data on the internal logic is sampled into the boundary-scan chain.
8.
In Shift-DR: The boundary-scan chain is shifted by the TCK input.
9.
In Update-DR: The data from the boundary-scan chain is applied to internal logic
inputs.
inputs.
10. Return to Run-Test/Idle.
35.5.2.5
CLAMP
This instruction selects the Bypass register as Data Register. The device output pins are driven
from the boundary-scan chain.
from the boundary-scan chain.
Starting in Run-Test/Idle, the CLAMP instruction is accessed the following way:
1.
Select the IR Scan path.
2.
In Capture-IR: The IR output value is latched into the shift register.
3.
In Shift-IR: The instruction register is shifted by the TCK input.
4.
In Update-IR: The data from the boundary-scan chain is applied to the output pins.
5.
Return to Run-Test/Idle.
6.
Select the DR Scan path.
7.
In Capture-DR: A logic ‘0’ is loaded into the Bypass Register.
8.
In Shift-DR: Data is scanned from TDI to TDO through the Bypass register.
Table 35-13. INTEST Details
Instructions
Details
IR input value
00100 (0x04)
IR output value
p0001
DR Size
Depending on boundary-scan chain, see BSDL-file.
DR input value
Depending on boundary-scan chain, see BSDL-file.
DR output value
Depending on boundary-scan chain, see BSDL-file.