参数资料
型号: ATEVK525
厂商: Atmel
文件页数: 12/30页
文件大小: 0K
描述: ADD ON KIT FOR STK525
标准包装: 1
附件类型: 大容量存储器
适用于相关产品: STK525
产品目录页面: 615 (CN2011-ZH PDF)
相关产品: ATSTK525-ND - KIT STARTER FOR AT90USB
其它名称: AT89EVK525
AT89EVK525-ND
Using the ATEVK525
2.4
2.5
LEDs
Test Points
Three LEDs are on the board:
– PWR_FAIL : orange LED that signals an overvoltage condition if the protection
circuit is mounted. This LED is optional.
– WRITE : red LED connected to PORTD7 of micro (also LED1 on STK525), that
may be driven by software when initiating a SCSI Write command
– READ : green LED connected to PORTD5 of micro (also LED3 on STK525),
that may be driven by software when initiating a SCSI Read command
Figure 2-7 . On-board SCSI signalling LEDs
Several test points are included on the board to facilitate debug during development. All
the test points are circular pads with a silk-screen printing that indicates the
corresponding signal:
– VCC: power supply voltage (should be 3.3V), taken after the power protection
circuit
– GND: power supply ground
2-12
7740B–AVR–03/08
SD_MISO: SD/MMC card MISO signal (card output)
SD_MOSI: SD/MMC card MOSI signal (card input)
SD_SCK: SD/MMC clock signal
SD_CS: SD/MMC chip select signal (active low)
NF_CLE: NAND Flash CLE signal
NF_ALE: NAND Flash ALE signal
NF_RE: NAND Flash RE# signal
NF_WE: NAND Flash WE# signal
ATEVK525 Mass Storage Board for AVR
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