AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 108

• 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

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AT43USB325
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7
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10 Ordering Information ........................................................................... 103
11 Packaging Information ........................................................................ 104
12 Errata Sheet .......................................................................................... 105
13 Change Log .......................................................................................... 106
Timer/Counters ...................................................................................... 42
I/O Ports .................................................................................................. 55
Programming the USB Module ............................................................. 63
Electrical Specification .......................................................................... 96
Table of Contents....................................................................................... i
6.1Timer/Counter Prescaler .........................................................................................42
6.28-bit Timer/Counter0 ...............................................................................................43
6.316-bit Timer/Counter1 .............................................................................................45
6.416-bit Timer/Counter1 Operation .............................................................................46
6.5Watchdog Timer ......................................................................................................53
7.1Port A ......................................................................................................................56
7.2Port B ......................................................................................................................57
7.3Port C ......................................................................................................................58
7.4Port D ......................................................................................................................59
7.5Port E ......................................................................................................................60
7.6Port F .......................................................................................................................61
8.1USB Function ..........................................................................................................63
8.2USB Registers .........................................................................................................71
8.3Endpoint Registers ..................................................................................................72
8.4USB Hub .................................................................................................................81
8.5Suspend and Resume .............................................................................................92
9.1Absolute Maximum Ratings .....................................................................................96
9.2DC Characteristics ..................................................................................................96
10.1Standard Package Options .................................................................................103
10.2Green Package Options (Pb/Halide-free/RoHS Compliant) ................................103
11.164AA – LQFP .....................................................................................................104
12.1Problem ...............................................................................................................105
12.2Fix/Workaround ...................................................................................................105
3355C–USB–4/05