at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 73

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

12.5.5.3
Figure 12-6. AMP Mictor Connector Orientation
12.5.6
12.5.6.1
6249D–ATARM–20-Dec-07
IEEE 1149.1 JTAG Boundary Scan
Application Board Restriction
JTAG Boundary-scan Register
The TCLK signal needs to be set with care, some timing parameters are required. See “ETM
Timings” for more details.
The specified target system connector is the AMP Mictor connector.
The connector must be oriented on the application board as described below in
view of the PCB is shown from above with the trace connector mounted near the edge of the
board. This allows the Trace Port Analyzer to minimize the physical intrusiveness of the inter-
connected target.
IEEE 1149.1 JTAG Boundary Scan allows pin-level access independent of the device packaging
technology.
IEEE 1149.1 JTAG Boundary Scan is enabled when JTAGSEL is high. The SAMPLE, EXTEST
and BYPASS functions are implemented. In ICE debug mode, the ARM processor responds
with a non-JTAG chip ID that identifies the processor to the ICE system. This is not IEEE 1149.1
JTAG-compliant.
It is not possible to switch directly between JTAG and ICE operations. A chip reset must be per-
formed after JTAGSEL is changed.
A Boundary-scan Descriptor Language (BSDL) file is provided to set up test.
The Boundary-scan Register (BSR) contains 664 bits that correspond to active pins and associ-
ated control signals.
Each AT91SAM9263 input/output pin corresponds to a 3-bit register in the BSR. The OUTPUT
bit contains data that can be forced on the pad. The INPUT bit facilitates the observability of data
applied to the pad. The CONTROL bit selects the direction of the pad.
Table 12-3.
Number
663
662
661
Bit
AT91SAM9263 JTAG Boundary Scan Register
38 37
2
1
Application Board
NADIA2-based
Pin 1Chamfer
Pin Name
PA19
AT91SAM9263 Preliminary
Pin Type
IN/OUT
Figure
Associated
CONTROL
BSR Cells
OUTPUT
INPUT
12-6. The
73