Atmel AT91SAM7L-STK - Manual (Page 23)

Board Description
AT91SAM7L-STK Rev. B Starter Kit User Guide 4-9
6414A–ATARM–12-Sep-08
4.9 DBGU
There is one serial debug port on the AT91SAM7L-STK for PC COM port connection for SAM-BA and
serial communication through TXD and RXD signals. An auto-power-down RS232 transceiver,
MAX3318E, is used on this board. When the board is powered on, SAM7L is in OFF mode and the
FORCEOFF pin is pull-down by default so that the MAX3318E is in power down mode. Waking-up the
SAM7L will immediately turn the MAX3318E back on (FORCEON=1, /FORCEOFF=1), thanks to the
default enabled pull-ups of SAM7L PIOs.
Figure 4-8. Serial Debug Interface
4.10 JTAG/ICE
There is a standard 20-pin JTAG/ICE connector on the AT91SAM7L-STK for any ARM JTAG emulator
connection, such as SAM-ICE.
Figure 4-9. JTAG/ICE Interface