Atmel STK526, Руководство пользователя, Страница: 17 / 38

Using the STK526
STK526 rev. B Hardware User Guide 2-17
7709B–AVR–05/07
Figure 2-14 . LEDs Implementation Schematic
2.6.3 Data Flash Memory
For USB Mass-storage class demonstration purposes, the STK526 provides an on-chip
serial Flash memory (AT45DB642x) connected to the AT90USB82/162 Serial Port
Interface (SPI).
The data-flash chip select signal is connected to PortC bit 2 of the AT90USB82/162
(See Figure 2-15).
Figure 2-15 . On-board data flash schematic
Although the dataflash is 3.3V powered, it withstands without problem 5V level signals.
In-line Grouped LEDs
D2 TOPLED LP M676
LED 0 (green)
D3 TOPLED LP M676
LED 1 (green)
D4 TOPLED LP M676
LED 2 (green)
D5 TOPLED LP M676
LED 3 (green)
R15 1k
R16 1k
R17 1k
R18 1k
PD0
PD1
PD3
PD[7..0
PD2
3.3V
SI
1
SCK
2
RESET
3
CS
4
WP
5
VCC
6
GND
7
SO
8
U4
AT45DB642D CASON8
R13
47k
PC2
C16
100nF
C12
100nF
PB[7..0]
R14 47k
3.3V
PB3
R12
47k
PB2
PB1