SAM9-L9261 Olimex Ltd., SAM9-L9261 Datasheet - Page 9

• Manufacturer Part Number: SAM9-L9261
• Description: MCU, MPU & DSP Development Tools DEV BRD FOR AT91SAM9260
• Manufacturer: Olimex Ltd.

Specifications of SAM9-L9261

• Processor To Be Evaluated: AT91SAM9260
• Data Bus Width: 16 bit, 32 bit
• Interface Type: RS-232, Ethernet, USB, JTAG
• Dimensions: 100 mm x 80 mm
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1776345 52R3721

JTAG PORT
setup the pin correspondingly as an output with initial high value, output
with initial low value, output or input. Example:
Outputs can be controlled by writing to the value file like this:
Pin sense value can be read regardless of its direction by reading the value
file:
Of course user is free to write a C program to access these files instead of
using the shell examples above.
The JTAG connector allows a debugger to talk via a JTAG (Joint Test Action
Group) port directly to the core. Instructions may be inserted and executed
by the core thus allowing SAM9261 memory to be programmed with code
and executed step by step by the host software.
For more details refer to IEEE Standard 1149.1 - 1990 Standard Test
Access Port and Boundary Scan Architecture and SAM9261 datasheet.
echo high > /sys/class/gpio/gpio39/direction
echo in > /sys/class/gpio/gpio40/direction
echo 0 > /sys/class/gpio/gpio39/value
echo 1 > /sys/class/gpio/gpio39/value
cat /sys/class/gpio/gpio39/value
cat /sys/class/gpio/gpio40/value
1
3
5
7
9
11
13
15
Pin #
VCC
ICE_NTRST
TDI
TMS
TCK
RTCK
TDO
ICE_NRST
Signal Name
2
4
6
8
10
12
14
16
Pin #
VCC
GND
GND
GND
GND
GND
GND
GND
Signal Name