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AT88SCK109STK3
3.4
3.5
3.5.1
AT90USB1287 AVR Microcontroller
To use the USB interface of the AT90USB1287, the clock source should always be a crystal or an
external clock oscillator (the internal 8MHz RC oscillator cannot be used to operate the USB
interface). Only the following crystal frequencies allow proper USB operations: 2MHz, 4MHz,
6MHz, 8MHz, 12MHz, and 16MHz. The AT88Microbase comes with a default 16MHz crystal
oscillator, which is required to obtain the 230.4K USART baud rate needed for
CryptoAuthentication communication.
Serial Links
USB
The AT88Microbase is supplied with a standard USB Type-A receptacle. The AT88Microbase only
operates as an “USB device”.
Figure 6.
USB Type-A Receptacle
3.5.2
USART
The AT90USB1287 AVR comes with an on-chip USART peripheral (USART1).
asynchronous mode is supported. See section 3.6.3 for pinout details.
Only the
3.5.3
SPI / TWI Selector Switch
The SPI – TWI selector switch (K1) allows either the SPI pins (MOSI and SCLK) or the TWI pins
(SDA and SCL) to be routed to the 10 pin Interface header, J1. See section 3.6.3 for pinout details.
3-8
8699A—CRYPTO—10/09
Figure 7.
TWI – SPI Selector Switch
AT88CK109STK3 User Guide
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相关代理商/技术参数
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AT88CK109STK8-PROMO 制造商:Atmel Corporation 功能描述:CRYPTOAUTHENTICATION EE, START
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AT88CK201STK 功能描述:安全/ 验证开发工具 Modular Starter Kit for CryptoRF w/micro RoHS:否 制造商:Digi International 产品:Development Kits 工具用于评估:XEB-AW140 接口类型:SPI, USB 工作电源电压:3.1 V to 3.6 V
AT88CK301ADP 功能描述:插座和适配器 CryptoProducts 10pin header adapter kit RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x
AT88CK427GREEN 功能描述:存储器 IC 开发工具 AES Memory Demo Kit RoHS:否 制造商:STMicroelectronics 产品:Reference Boards 工具用于评估:M24LR64-R 存储容量:64 kbit 存储类型:EEPROM 工作电源电压:1.8 V to 5.5 V
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