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PDF AT90USB646 Data sheet ( Hoja de datos )
| Número de pieza | AT90USB646 | |
| Descripción | 8-bit Microcontroller | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• High performance, low power AVR® 8-bit Microcontroller
• Advanced RISC architecture
– 135 powerful instructions – most single clock cycle execution
– 32 × 8 general purpose working registers
– Fully static operation
– Up to 16MIPS throughput at 16MHz
– On-chip 2-cycle multiplier
• Non-volatile program and data memories
– 64/128Kbytes of in-system self-programmable flash
• Endurance: 100,000 write/erase cycles
– Optional Boot Code section with independent lock bits
• USB boot loader programmed by default in the factory
• In-system programming by on-chip boot program hardware activated after
reset
• True read-while-write operation
• All supplied parts are pre-programed with a default USB bootloader
– 2K/4K (64K/128K flash version) bytes EEPROM
• Endurance: 100,000 write/erase cycles
– 4K/8K (64K/128K flash version) bytes internal SRAM
– Up to 64Kbytes optional external memory space
– Programming lock for software security
• JTAG (IEEE std. 1149.1 compliant) interface
– Boundary-scan capabilities according to the JTAG standard
– Extensive on-chip debug support
– Programming of flash, EEPROM, fuses, and lock bits through the JTAG interface
• USB 2.0 full-speed/low-speed device and on-the-go module
– Complies fully with:
– Universal serial bus specification REV 2.0
– On-the-go supplement to the USB 2.0 specification rev 1.0
– Supports data transfer rates up to 12Mbit/s and 1.5Mbit/s
• USB full-speed/low speed device module with interrupt on transfer completion
– Endpoint 0 for control transfers: up to 64-bytes
– Six programmable endpoints with in or out directions and with bulk, interrupt or
isochronous transfers
– Configurable endpoints size up to 256bytes in double bank mode
– Fully independent 832bytes USB DPRAM for endpoint memory allocation
– Suspend/resume interrupts
– Power-on reset and USB bus reset
– 48MHz PLL for full-speed bus operation
– USB bus disconnection on microcontroller request
• USB OTG reduced host:
– Supports host negotiation protocol (HNP) and session request protocol (SRP) for
OTG dual-role devices
– Provide status and control signals for software implementation of HNP and SRP
– Provides programmable times required for HNP and SRP
• Peripheral features
– Two 8-bit timer/counters with separate prescaler and compare mode
– Two16-bit timer/counter with separate prescaler, compare- and capture mode
8-bit Atmel
Microcontroller
with
64/128Kbytes
of ISP Flash
and USB
Controller
AT90USB646
AT90USB647
AT90USB1286
AT90USB1287
7593L–AVR–09/12
1 page  
AT90USB64/128
2. Overview
The Atmel® AVR® AT90USB64/128 is a low-power CMOS 8-bit microcontroller based on the
Atmel® AVR® enhanced RISC architecture. By executing powerful instructions in a single clock
cycle, the AT90USB64/128 achieves throughputs approaching 1MIPS per MHz allowing the sys-
tem designer to optimize power consumption versus processing speed.
7593L–AVR–09/12
5
5 Page 
AT90USB64/128
5. AVR CPU core
5.1 Introduction
This section discusses the AVR core architecture in general. The main function of the CPU core
is to ensure correct program execution. The CPU must therefore be able to access memories,
perform calculations, control peripherals, and handle interrupts.
5.2 Architectural overview
Figure 5-1. Block diagram of the AVR architecture.
Data bus 8-bit
Flash
program
memory
Instruction
register
Instruction
decoder
Control lines
Program
counter
Status
and control
32 x 8
general
purpose
registrers
ALU
Interrupt
unit
SPI
unit
Watchdog
timer
Analog
comparator
Data
SRAM
EEPROM
I/O Module1
I/O Module 2
I/O Module n
I/O lines
In order to maximize performance and parallelism, the AVR uses a Harvard architecture – with
separate memories and buses for program and data. Instructions in the program memory are
executed with a single level pipelining. While one instruction is being executed, the next instruc-
tion is pre-fetched from the program memory. This concept enables instructions to be executed
in every clock cycle. The program memory is In-System Re-programmable Flash memory.
7593L–AVR–09/12
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AT90USB646.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AT90USB646 | 8-bit Microcontroller | ATMEL Corporation |
| AT90USB646 | (AT90USBxxx) 8-bit Microcontroller | ATMEL Corporation |
| AT90USB647 | 8-bit Microcontroller | ATMEL Corporation |
| AT90USB647 | (AT90USBxxx) 8-bit Microcontroller | ATMEL Corporation |
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