GRM1885C1H200JA01D datasheet(10/38 Pages) ATMEL

10 / 38 page

AT88SCK109STK3

3-8

AT88CK109STK3 User Guide

8699A—CRYPTO—10/09

3.4

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.

3.5

Serial Links

3.5.1

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).

Only the

asynchronous mode is supported. See section 3.6.3 for pinout details.

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.

Figure 7.

TWI – SPI Selector Switch

Similar Part No. - GRM1885C1H200JA01D

Manufacturer	Part #	Datasheet	Description
Murata Manufacturing Co...	GRM1885C1H200JA01	837Kb / 30P	Chip Monolithic Ceramic Capacitor for General

Manufacturer	Part #	Datasheet	Description
ATMEL Corporation	STK525	889Kb / 39P	AT90USBxxx TQFP device (2.7V
ATMEL Corporation	STK526	1Mb / 40P	AT90USB82/162 TQFP device (2.7V
Intersil Corporation	ISL4241E	266Kb / 14P	QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps, 2.7V to 5.5V, 10Nanoamp, 250kbps,
	ISL3232E	281Kb / 14P	QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 2.7V to 5.5V, 150nA, 250kbps, RS-232
	ISL3232EIRZ	279Kb / 14P	QFN Packaged, ±15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers May 13, 2010
	ISL4221E	415Kb / 13P	QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kBps, RS-232 Transmitters/Receivers
Renesas Technology Corp	ISL4241E	684Kb / 14P	QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/Receivers
Renesas Technology Corp	ISL3232E	661Kb / 14P	QFN Packaged, 짹15kV ESD Protected, 2.7V to 5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
Intersil Corporation	ISL4221E	401Kb / 13P	QFN Packaged, /-15kV ESD Protected, 2.7V to 5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
EHAOAN.	HS538	1Mb / 8P	2.7V or 5.5V supply voltage