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Рыбницкий Филиал Приднестровского Государственного Университета им.Т.Г.Шевченко

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AVR / datasheets / AT90USB82_162.pdf

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Ordering

Information

Part Number	Temp. Range	Flash Memory Size	Package	Product Marking

90USB82-16MU	Industrial Green	8K	QFN32	90USB82-16MU

90USB162-16MU	Industrial Green	16K	QFN32	90USB162-16MU

90USB162-16AU	Industrial Green	16K	TQFP32	90USB162-16AU

Packaging Information

Package Type

QFN32 Exposed Pad Dim. 3.6 x 3.6mm

268

7707A–AVR–01/07

QFN32

* * * * * *

* See package information

269

7707A–AVR–01/07

TQFP32

270

7707A–AVR–01/07

Table of Contents

Features................................................................................................	1
Pin Configurations...............................................................................	2
Disclaimer .............................................................................................................	2
Block Diagram ......................................................................................................	3
Pin Descriptions....................................................................................................	5
About Code Examples.........................................................................	6
AVR CPU Core .....................................................................................	7
Introduction ...........................................................................................................	7
Architectural Overview..........................................................................................	7
ALU – Arithmetic Logic Unit..................................................................................	8
Status Register .....................................................................................................	8
General Purpose Register File .............................................................................	9
Stack Pointer ......................................................................................................	11
Instruction Execution Timing...............................................................................	11
Reset and Interrupt Handling..............................................................................	12
AVR AT90USB82/162 Memories.......................................................	15
In-System Reprogrammable Flash Program Memory ........................................	15
SRAM Data Memory...........................................................................................	16
EEPROM Data Memory......................................................................................	18
I/O Memory .........................................................................................................	23
System Clock and Clock Options ....................................................	25
Clock Systems and their Distribution ..................................................................	25
Clock Switch .......................................................................................................	26
Clock Sources.....................................................................................................	29
Low Power Crystal Oscillator..............................................................................	30
Calibrated Internal RC Oscillator ........................................................................	31
External Clock.....................................................................................................	33
Clock Output Buffer ............................................................................................	33
System Clock Prescaler......................................................................................	33
PLL .....................................................................................................................	36
Power Distribution.............................................................................	38
Power Management and Sleep Modes.............................................	40
Idle Mode ............................................................................................................	41
Power-down Mode..............................................................................................	41
Power-save Mode...............................................................................................	41

Standby Mode.....................................................................................................	41
Extended Standby Mode ....................................................................................	41
Power Reduction Register ..................................................................................	43
Minimizing Power Consumption .........................................................................	44
System Control and Reset................................................................	46
Internal Voltage Reference .................................................................................	51
Watchdog Timer .................................................................................................	52
Interrupts............................................................................................	61
Interrupt Vectors in AT90USB82/162 .................................................................	61
I/O-Ports..............................................................................................	64
Introduction .........................................................................................................	64
Ports as General Digital I/O ................................................................................	65
Alternate Port Functions .....................................................................................	69
External Interrupts.............................................................................	81
Timer/Counter0 and Timer/Counter1 Prescalers ............................	85
8-bit Timer/Counter0 with PWM........................................................	87
Overview.............................................................................................................	87
Timer/Counter Clock Sources.............................................................................	88
Counter Unit........................................................................................................	88
Output Compare Unit..........................................................................................	89
Compare Match Output Unit ...............................................................................	90
Modes of Operation ............................................................................................	91
Timer/Counter Timing Diagrams.........................................................................	96
8-bit Timer/Counter Register Description ...........................................................	98
16-bit Timer/Counter (Timer/Counter1)..........................................	104
Overview...........................................................................................................	104
Accessing 16-bit Registers ...............................................................................	106
Timer/Counter Clock Sources...........................................................................	110
Counter Unit......................................................................................................	110
Input Capture Unit.............................................................................................	111
Output Compare Units ......................................................................................	112
Compare Match Output Unit .............................................................................	115
Modes of Operation ..........................................................................................	116
Timer/Counter Timing Diagrams.......................................................................	123
16-bit Timer/Counter Register Description .......................................................	126

Table of Contents

Serial Peripheral Interface – SPI.....................................................	135
SS Pin Functionality..........................................................................................	140
Data Modes ......................................................................................................	142
USART ..............................................................................................	144
Overview...........................................................................................................	144
Clock Generation ..............................................................................................	146
Frame Formats .................................................................................................	148
USART Initialization..........................................................................................	149
Data Transmission – The USART Transmitter .................................................	150
Data Reception – The USART Receiver ..........................................................	153
Asynchronous Data Reception .........................................................................	157
Multi-processor Communication Mode .............................................................	160
USART Register Description ............................................................................	162
Examples of Baud Rate Setting........................................................................	167
USART in SPI Mode.........................................................................	171
Overview...........................................................................................................	171
Clock Generation ..............................................................................................	171
SPI Data Modes and Timing.............................................................................	172
Frame Formats .................................................................................................	172
Data Transfer....................................................................................................	174
USART MSPIM Register Description ...............................................................	176
AVR USART MSPIM vs.
AVR SPI............................................................................................................	178
Features............................................................................................................	179
Block Diagram ..................................................................................................	179
Typical Application Implementation ..................................................................	180
General Operating Modes ................................................................................	182
Power modes....................................................................................................	185
Memory access capability.................................................................................	185
Memory management.......................................................................................	186
PAD suspend....................................................................................................	187
D+/D- Read/write ..............................................................................................	188
Registers description ........................................................................................	188
USB Software Operating modes.......................................................................	191
Introduction .......................................................................................................	192
Power-on and reset ..........................................................................................	192
Endpoint reset...................................................................................................	192
USB reset .........................................................................................................	193
Endpoint selection ............................................................................................	193
Endpoint activation ...........................................................................................	193

Table of Contents

Address Setup ..................................................................................................	194
Suspend, Wake-up and Resume......................................................................	194
Detach ..............................................................................................................	194
Remote Wake-up..............................................................................................	195
STALL request..................................................................................................	195
CONTROL endpoint management ...................................................................	196
OUT endpoint management .............................................................................	197
IN endpoint management .................................................................................	198
Isochronous mode ............................................................................................	200
Overflow............................................................................................................	200
Interrupts...........................................................................................................	201
Registers...........................................................................................................	202
PS/2...................................................................................................	213
Characteristics ..................................................................................................	213
Analog Comparator .........................................................................	215
Boot Loader Support – Read-While-Write Self-Programming.....	217
Boot Loader Features .......................................................................................	217
Application and Boot Loader Flash Sections ....................................................	217
Read-While-Write and No Read-While-Write Flash Sections...........................	217
Boot Loader Lock Bits.......................................................................................	219
Entering the Boot Loader Program ...................................................................	220
Addressing the Flash During Self-Programming ..............................................	223
Self-Programming the Flash .............................................................................	224
Features............................................................................................................	231
Overview...........................................................................................................	231
Physical Interface .............................................................................................	231
Software Break Points ......................................................................................	232
Limitations of debugWIRE ................................................................................	232
debugWIRE Related Register in I/O Memory ...................................................	232
Memory Programming.....................................................................	233
Program And Data Memory Lock Bits ..............................................................	233
Fuse Bits...........................................................................................................	234
Signature Bytes ................................................................................................	236
Calibration Byte ................................................................................................	236
Parallel Programming Parameters, Pin Mapping, and Commands ..................	236
Parallel Programming .......................................................................................	240
Serial Downloading...........................................................................................	248
Serial Programming Pin Mapping .....................................................................	248

Absolute Maximum Ratings*.............................................................................	253
DC Characteristics............................................................................................	253
External Clock Drive Waveforms ......................................................................	255
External Clock Drive .........................................................................................	255
Maximum speed vs. VCC .........................................................................................................................	256
SPI Timing Characteristics ...............................................................................	257
Hardware Boot EntranceTiming Characteristics...............................................	258
AT90USB82/162 Typical Characteristics – Preliminary Data.......	259
Supply Current of IO modules ..........................................................................	259
Register Summary ...........................................................................	261
Ordering Information.......................................................................	268
Packaging Information....................................................................	268
QFN32 ..............................................................................................................	269
TQFP32 ............................................................................................................	270

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