参数资料
型号: AT88CK109STK3
厂商: Atmel
文件页数: 10/38页
文件大小: 0K
描述: KIT JAVAN BASE/SCKT BD/IC SAMPLE
标准包装: 1
系列: CryptoAuthentication™
主要目的: 接口,防拆与安全性
嵌入式: 是,MCU,8 位
已用 IC / 零件: ATSHA204
主要属性: SWI(单线接口)
次要属性: USB 接口
已供物品: 2 板,电缆,样品
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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