AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 107

• Manufacturer Part Number: AT43USB325E-AU
• Description: IC USB KEYBOARD CTRLR 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
3355C–USB–4/05
1
2
3
4
5
Features ..................................................................................................... 1
Description ............................................................................................... 1
Architectural Overview ............................................................................ 7
General-purpose Register File ................................................................ 9
Functional Description .......................................................................... 20
AVR Register Set ................................................................................... 40
1.1Pin Configuration .......................................................................................................2
1.2Pin Assignment .........................................................................................................3
1.3Signal Description .....................................................................................................4
3.1X-, Y- and Z- Registers ............................................................................................10
3.2Arithmetic Logic Unit (ALU) .....................................................................................10
3.3Program Memory .....................................................................................................10
3.4SPI Serial EEPROM Interface (AT43USB325E Only) .............................................11
3.5SRAM Data Memory ...............................................................................................12
3.6I/O Memory ..............................................................................................................17
3.7USB Hub .................................................................................................................18
4.1On-chip Power Supply .............................................................................................20
4.2I/O Pin Characteristics .............................................................................................20
4.3Oscillator and PLL ...................................................................................................20
4.4Reset and Interrupt Handling ..................................................................................21
4.5Reset Sources .........................................................................................................23
4.6Power-on Reset .......................................................................................................24
4.7External Reset .........................................................................................................25
4.8Watchdog Timer Reset ............................................................................................25
4.9Non-USB Related Interrupt Handling ......................................................................26
4.10External Interrupts .................................................................................................29
4.11Interrupt Response Time .......................................................................................29
4.12USB Interrupt Sources ..........................................................................................31
4.13USB Endpoint Interrupt Sources ...........................................................................32
5.1Status Register and Stack Pointer ..........................................................................40
5.2Sleep Modes ...........................................................................................................41
AT43USB325
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