Atmel STK526, Руководство пользователя, Страница: 19 / 38

Using the STK526
STK526 rev. B Hardware User Guide 2-19
7709B–AVR–05/07
Figure 2-17 . EXP.CON 0 and EXP.CON 1 Connectors
2.7.3 Main Clock from STK500
The AVR clock frequency (external) coming from STK500 (XT1/XT2) can also be
controlled from AVR Studio®.
“STKX1” and ”STKX2” jumpers should be closed
2.7.4 RESET from STK500
The AVR RESET coming from STK500 (NRST - EXP.CON 0) can also control the
STK526.
2.8 In-System Programming
2.8.1 Programming with USB bootloader: DFU (Device Firmware Upgrade)
AT90USB82/162 part comes with a default factory pre-programmed USB bootloader
located in the on-chip boot section of the AT90USB82/162. This is the easiest and
fastest way to reprogram the device directly over the USB interface. The “Flip” PC-side
application available for free on Atmel website offers a flexible and user friendly
interface to reprogram the application over the USB bus.
The HWB pin of the AT90USB82/162 allows to force the bootloader section execution
after reset. (Refer to AT90USB82/162 datasheet section “Bootloader support”). To force
bootloader execution, operate as follows:
Press both “RST” and “HWB” push buttons
First release the “RST” push button
Then release the “HWB” push button
EXP. CON 1
GND GND 1 2
n.c. ( AUXI0 ) n.c. ( AUXO0 ) 3 4
n.c. ( CT7 ) n.c. ( CT6 ) 5 6
n.c. ( CT5 ) n.c. ( CT4 ) 7 8
n.c. ( CT3 ) n.c. ( CT2 ) 9 10
n.c. (
CT1
) n.c. (
BSEL2
) 11 12
n.c. REF 13 14
NRST PG2 15 16
PG1 PG0 17 18
GND GND 19 20
PC7 PC6 23 24
VTG VTG 21 22
PC5 PC4 25 26
PC3 PC2 27 28
PC1 PC0 29 30
PA7 PA6 31 32
PA5 PA4 33 34
PA3 PA2 35 36
PA1 PA0 37 38
GND GND 39 40
GND GND 1 2
n.c. ( AUXI1 ) n.c. ( AUXO1 ) 3 4
n.c. ( DATA7 ) n.c. ( DATA6 ) 5 6
n.c. ( DATA5 ) n.c. ( DATA4 ) 7 8
n.c. ( DATA3 ) n.c. ( DATA2 ) 9 10
n.c. (
DATA1
) n.c. (
DATA0
) 11 12
n.c. ( SI ) n.c. ( SO ) 13 14
n.c. (
SCK
) n.c. (
CS
) 15 16
XT1 XT2 17 18
VTG VTG 19 20
PB7 PB6 23 24
GND GND 21 22
PB5 PB4 25 26
PB3 PB2 27 28
PB1 PB0 29 30
PD7 PD6 31 32
PD5 PD4 33 34
PD3 PD2 35 36
PD1 PD0 37 38
GND GND 39 40
EXP. CON 0
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