at43usb320a ATMEL Corporation, at43usb320a Datasheet - Page 113

• Manufacturer Part Number: at43usb320a
• Description: Full-speed Usb Microcontroller With An Embedded Hub
• Manufacturer: ATMEL Corporation

Table of
Contents
Features ................................................................................................. 1
Description ............................................................................................ 1
Hub/Monitor/IR Chip Application......................................................... 2
Pin Configurations................................................................................ 2
Pin Assignment ................................................................................... 3
Architectural Overview......................................................................... 7
The General-purpose Register File ..................................................... 8
Functional Description ....................................................................... 19
AVR Register Set ................................................................................ 36
Timer/Counters ................................................................................... 38
Signal Description ................................................................................................ 5
X-, Y- and Z- Registers......................................................................................... 9
ALU – Arithmetic Logic Unit ................................................................................. 9
Program Memory.................................................................................................. 9
SRAM Data Memory .......................................................................................... 10
I/O Memory......................................................................................................... 16
USB Hub ............................................................................................................ 17
On-chip Power Supply........................................................................................ 19
I/O Pin Characteristics........................................................................................ 19
Oscillator and PLL .............................................................................................. 19
Reset and Interrupt Handling ............................................................................. 20
Reset Sources.................................................................................................... 22
Power-on Reset.................................................................................................. 23
External Reset.................................................................................................... 24
Watchdog Timer Reset....................................................................................... 24
Non-USB Related Interrupt Handling ................................................................. 24
External Interrupts .............................................................................................. 29
Interrupt Response Time .................................................................................... 29
USB Interrupt Sources ....................................................................................... 31
USB Endpoint Interrupt Sources ........................................................................ 32
Status Register and Stack Pointer ..................................................................... 36
Sleep Modes ...................................................................................................... 37
Timer/Counter Prescaler .................................................................................... 38
Table of Contents
i