PDF AT43USB321 Data sheet ( Hoja de datos )

Número de pieza AT43USB321
Descripción Full-speed USB Hub/Function Microcontroller
Fabricantes ATMEL Corporation 
Logotipo ATMEL Corporation Logotipo

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No Preview Available ! AT43USB321 Hoja de datos, Descripción, Manual
8-bit AVR® Core with 83 ns Instruction Cycle Time
16K Bytes ROM Program Memory
512 Bytes SRAM
32 x 8 General Purpose Working Registers
20 Programmable I/O Port Pins
Programmable Serial UART
SPI Serial Interface
One 8-bit Timer/Counter with Separate Prescaler
One 16-bit Timer/Counter with Separate Prescaler
External and Internal Interrupt Sources
Programmable Watchdog Timer with On-chip Oscillator
Bus-or Self-powered USB Hub with Four Downstream Ports
One Attached Function Port with Three Endpoints
Programmable 6/12 MHz Oscillator with PLL
On-chip 3.3V Supply for USB
42-pin SDIP and 48-lead TQFP Packages
The Atmel AT43USB321 is a single-chip microcontroller based USB hub with an
embedded function and a 16K byte masked ROM. The USB hub has five downstream
ports, one of which is permanently attached. Internally the AT43320 consists of a USB
hub and function interface, a hub repeater, and a high-performance, efficient 8-bit
RISC microcontroller. The hub and peripheral device controller function is imple-
mented in the microcontoller’s firmware. To the USB host, the embedded function
appears as an attached port of the hub with its own device address and endpoints.
The AT43USB321 can also be configured as a USB function without the hub.
The USB hardware block consists of a USB transceiver, SIE, hub repeater, endpoint
controllers, and an interface to the microcontroller. The USB hardware interfaces to
the USB host at the transaction level. The CPU of the microcontroller is based on the
Atmel AVR microcontroller. The AVR architecture was developed to be programmed
in C efficiently and with maximum performance.
Full-speed USB
Rev. 1442A–08/99

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