AVR454
Figure 2-2. SB100 with connectors highlighted
A – JB3
B – CONN2
C – CONN1
D – J1
E – JB1
F – HDR2
G – JB4
H – HDR1
I – JB2
2.1.1 Programming and debugging (HDR2)
HDR2 provides access to the JTAG interface of the ATmega406, which is used for
programming and debugging using the JTAGICE mkII. The use of JTAGICE mkII is
described in the AVR Studio ? online Users Guide and on the Atmel web. Note that
the older JTAGICE does not work with this board.
If the emulator is not required, the I/O signals present here can be used for other
purposes.
Table 2-1. HDR2: JTAG Port
Pin
1
2
3
4
5
6
7
8
9
10
Name
PB3 / TCK
GND
PB0 / TDO
VTref
PB2 / TMS
/RESET
Vsupply
n/c
PB1 / TDI
GND
Direction
I/O
I/O
Output
I/O
Input
Output
I/O
Usage
TCK JTAG signal
TDO JTAG signal
+3.3V reference
TMS JTAG signal
Reset signal
+3.3V
TDI JTAG signal
3
2598C-AVR-06/06
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